{"id":22527,"date":"2025-10-18T14:06:49","date_gmt":"2025-10-18T12:06:49","guid":{"rendered":"https:\/\/www.jgclassics.com\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/"},"modified":"2025-10-28T16:46:56","modified_gmt":"2025-10-28T15:46:56","slug":"my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems","status":"publish","type":"post","link":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/","title":{"rendered":"My classic car is leaking oil (V) &#8211; Engine breather and crankcase ventilation problems"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"22527\" class=\"elementor elementor-22527 elementor-22449\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-5753eadc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5753eadc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7bf7cc12\" data-id=\"7bf7cc12\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5e1bd317 elementor-widget elementor-widget-wpml-language-switcher\" data-id=\"5e1bd317\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"wpml-language-switcher.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"wpml-elementor-ls\">\n<div role=\"navigation\" aria-label=\"Language Switcher\" class=\"wpml-ls-statics-shortcode_actions wpml-ls wpml-ls-legacy-list-horizontal\">\n\t<ul><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-es wpml-ls-first-item wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/\" hreflang=\"es\" lang=\"es\" class=\"wpml-ls-link\" aria-label=\"Switch to Spanish (Espa\u00f1ol)\" title=\"Switch to Spanish (Espa\u00f1ol)\">\n\t\t\t\t\t                                    <img decoding=\"async\"\n            class=\"wpml-ls-flag\"\n            src=\"https:\/\/www.jgclassics.com\/wp-content\/plugins\/sitepress-multilingual-cms\/res\/flags\/es.svg\"\n            alt=\"\"\n            loading=\"lazy\"\n            width=18\n            height=12\n    \/><span class=\"wpml-ls-native\">Espa\u00f1ol<\/span><span class=\"wpml-ls-display\"><span class=\"wpml-ls-bracket\"> (<\/span>Spanish<span class=\"wpml-ls-bracket\">)<\/span><\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-ca wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/ca\/\" hreflang=\"ca\" lang=\"ca\" class=\"wpml-ls-link\" aria-label=\"Switch to Catalan (Catal\u00e0)\" title=\"Switch to Catalan (Catal\u00e0)\">\n\t\t\t\t\t                                    <img decoding=\"async\"\n            class=\"wpml-ls-flag\"\n            src=\"https:\/\/www.jgclassics.com\/wp-content\/plugins\/sitepress-multilingual-cms\/res\/flags\/ca.svg\"\n            alt=\"\"\n            loading=\"lazy\"\n            width=18\n            height=12\n    \/><span class=\"wpml-ls-native\">Catal\u00e0<\/span><span class=\"wpml-ls-display\"><span class=\"wpml-ls-bracket\"> (<\/span>Catalan<span class=\"wpml-ls-bracket\">)<\/span><\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-en wpml-ls-current-language wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/en\/\" hreflang=\"en\" lang=\"en\" class=\"wpml-ls-link\" aria-current=\"page\" aria-label=\"Switch to English (English)\" title=\"Switch to English (English)\">\n\t\t\t\t\t                                    <img decoding=\"async\"\n            class=\"wpml-ls-flag\"\n            src=\"https:\/\/www.jgclassics.com\/wp-content\/plugins\/sitepress-multilingual-cms\/res\/flags\/en.svg\"\n            alt=\"\"\n            loading=\"lazy\"\n            width=18\n            height=12\n    \/><span class=\"wpml-ls-native\">English<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-fr wpml-ls-last-item wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/fr\/\" hreflang=\"fr\" lang=\"fr\" class=\"wpml-ls-link\" aria-label=\"Switch to French (Fran\u00e7ais)\" title=\"Switch to French (Fran\u00e7ais)\">\n\t\t\t\t\t                                    <img decoding=\"async\"\n            class=\"wpml-ls-flag\"\n            src=\"https:\/\/www.jgclassics.com\/wp-content\/plugins\/sitepress-multilingual-cms\/res\/flags\/fr.svg\"\n            alt=\"\"\n            loading=\"lazy\"\n            width=18\n            height=12\n    \/><span class=\"wpml-ls-native\">Fran\u00e7ais<\/span><span class=\"wpml-ls-display\"><span class=\"wpml-ls-bracket\"> (<\/span>French<span class=\"wpml-ls-bracket\">)<\/span><\/span><\/a>\n\t\t\t<\/li><\/ul>\n<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-623d7706 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"623d7706\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b0be77e\" data-id=\"b0be77e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-68fd80a1\" data-id=\"68fd80a1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-46663c2a elementor-share-buttons--view-icon elementor-share-buttons--skin-gradient elementor-share-buttons--shape-square elementor-grid-0 elementor-share-buttons--color-official elementor-widget elementor-widget-share-buttons\" data-id=\"46663c2a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"share-buttons.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_facebook\" role=\"button\" tabindex=\"0\" aria-label=\"Share on facebook\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fab fa-facebook\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_whatsapp\" role=\"button\" tabindex=\"0\" aria-label=\"Share on whatsapp\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fab fa-whatsapp\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_email\" role=\"button\" tabindex=\"0\" aria-label=\"Share on email\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fas fa-envelope\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_pinterest\" role=\"button\" tabindex=\"0\" aria-label=\"Share on pinterest\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fab fa-pinterest\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-138c4407 elementor-section-full_width elementor-section-height-min-height elementor-section-stretched elementor-section-height-default elementor-section-items-middle\" data-id=\"138c4407\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3bd6d333\" data-id=\"3bd6d333\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7ad34c86 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"7ad34c86\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"864\" height=\"1536\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-864x1536.jpg\" class=\"attachment-1536x1536 size-1536x1536 wp-image-22509\" alt=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini). Installed\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-864x1536.jpg 864w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-169x300.jpg 169w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-576x1024.jpg 576w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-768x1365.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-1153x2048.jpg 1153w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-scaled.jpg 1441w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6882606a elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"6882606a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInDown&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">My classic car is leaking oil (V) - Engine breather problems preventing proper crankcase ventilation<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42e091c elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"42e091c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInDown&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">When it is essential to solve the cause and not to alleviate the consequence<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f6bcab6 elementor-widget elementor-widget-post-info\" data-id=\"4f6bcab6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-6869cb2 elementor-inline-item\" itemprop=\"author\">\n\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/en\/author\/jgclassics_hikp0z\/\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"far fa-user-circle\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-author\">\n\t\t\t\t\t\t\t\t\t\tJG Classics Administrator\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-a911f47 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-calendar\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>October 18, 2025<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-5aa2e53 elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"far fa-clock\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-time\">\n\t\t\t\t\t\t\t\t\t\t<time>2:06 pm<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-11d7b4e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"11d7b4e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-742acb2\" data-id=\"742acb2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6024b31 elementor-widget elementor-widget-text-editor\" data-id=\"6024b31\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In the world of classic cars, a small oil stain under the car is often accepted almost as a medal of authenticity or at least as an unavoidable evil. In many cases, it certainly is, and fortunately they are minor evils that we can alleviate. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-438693c elementor-widget elementor-widget-text-editor\" data-id=\"438693c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>But there are nuances, as I mentioned in the previous parts of this article, where the cause must be sought.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-0759a5c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0759a5c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7fc11af\" data-id=\"7fc11af\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c3ec336 elementor-widget elementor-widget-heading\" data-id=\"c3ec336\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Phantom\" oil level drops - where can they come from? <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-d180327 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d180327\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6b3535e\" data-id=\"6b3535e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b8fe71f elementor-widget elementor-widget-image\" data-id=\"b8fe71f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Renault 4CV: Engine Compartment\" data-elementor-lightbox-description=\"Renault 4CV: Available for rental, photos, filming, footage\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTI4NTYsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjNcLzAzXC8yMDIzMDMwNV8xMzA2MzgtY29waWEtc2NhbGVkLmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"576\" height=\"1024\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-576x1024.jpg\" class=\"attachment-large size-large wp-image-12856\" alt=\"Renault 4CV: Engine compartment - detail\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-576x1024.jpg 576w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-169x300.jpg 169w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-768x1365.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-864x1536.jpg 864w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-1152x2048.jpg 1152w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/03\/20230305_130638-copia-scaled.jpg 1440w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-93a3591\" data-id=\"93a3591\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6a96fb4 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"6a96fb4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>When leaks or oil level drops start to be more than symbolic, they have to be checked in detail. The usual investigation usually focuses on seals, gaskets or loose screws, once the possibility of an internal problem (such as poor cylinder sealing or other anomalies that require the engine to be opened) has been ruled out. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c3a087 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"2c3a087\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>And in these investigations where the origin of the oil level drop is difficult to identify, and becomes almost &#8220;phantom drop&#8221;, what is rarely considered is that the problem lies in <strong>how the engine breathes<\/strong> and the <strong>evacuation of internal oil vapors<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f7508d elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"1f7508d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The <strong>crankcase ventilation<\/strong> is that discreet system that hardly anyone checks, and yet it can be the <strong>silent culprit of persistent leaks<\/strong>, abnormal oil consumption or curious situations in which, for example, the oil dipstick &#8220;jumps&#8221; without anyone knowing why. Many owners then believe that the problem is in the dipstick, thinking that it is defective, when in fact this <strong>is not the cause, but the consequence<\/strong> of an engine that literally tries to expel pressure wherever it can. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-f1aea6f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f1aea6f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0c12856\" data-id=\"0c12856\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cd18314 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"cd18314\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In a combustion engine, a small part of the gases in the chamber pass between the piston rings and down into the crankcase: this is known as <em>blow-by<\/em>. You can <strong><a href=\"https:\/\/diverepairs.com\/articles-resources\/compressor-blow-by-explained\/\" target=\"_blank\" rel=\"noopener\">take a look at this link<\/a><\/strong> where you can see it very well schematically. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9157595 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"9157595\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This mixture of gases and steam from the hot oil increases the internal pressure, and if not properly evacuated, ends up pushing the oil through any weak point: seals, oil seals or even the dipstick.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d346506 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"d346506\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The mission of the crankcase ventilation system is as simple as it is vital: to <strong>keep the internal pressure balanced<\/strong> and allow these gases to escape without entraining oil.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-78e898e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"78e898e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c66ce86\" data-id=\"c66ce86\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-568d5dd elementor-widget elementor-widget-heading\" data-id=\"568d5dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The problem of the oil level control of our Renault Dauphine Gordini<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-9e776c4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9e776c4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-ebb569d\" data-id=\"ebb569d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-72b889c elementor-widget elementor-widget-text-editor\" data-id=\"72b889c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>That problem of lack of ventilation was what happened to our Renault Dauphine Gordini: A freshly rebuilt engine -reground block, new crankshaft, new liners, pistons, oil pump, crank and main bearings, new cylinder head, new crankcase- everything new, everything perfect on the bench&#8230; until a freeway trip started to show the problem of &#8220;external&#8221; oil leaks. Only on the highway. Problem that had already happened in the past-.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-3555430\" data-id=\"3555430\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a0e0aaf elementor-widget elementor-widget-image\" data-id=\"a0e0aaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"684\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/11\/IMG_3814-1024x684.jpg\" class=\"attachment-large size-large wp-image-12357\" alt=\"Renault Dauphine Gordini engine\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/11\/IMG_3814-1024x684.jpg 1024w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/11\/IMG_3814-300x200.jpg 300w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/11\/IMG_3814-768x513.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/11\/IMG_3814-1536x1025.jpg 1536w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/11\/IMG_3814-2048x1367.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-78209c8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"78209c8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0144428\" data-id=\"0144428\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d3faab5 elementor-widget elementor-widget-heading\" data-id=\"d3faab5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why had the engine had to be rebuilt?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-7501f80 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7501f80\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6bcf845\" data-id=\"6bcf845\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e79cca8 elementor-widget elementor-widget-image\" data-id=\"e79cca8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuild: Crankshaft mounted with bushings. Checking that it turns freely. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTAsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC9kYXVwaGluZV9yZXBhaXIwMS5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"607\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01-1024x607.jpg\" class=\"attachment-large size-large wp-image-22510\" alt=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01-1024x607.jpg 1024w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01-300x178.jpg 300w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01-768x455.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01.jpg 1371w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-daa20a8\" data-id=\"daa20a8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ec94448 elementor-widget elementor-widget-text-editor\" data-id=\"ec94448\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Because there was a catastrophic breakdown caused by a massive oil leak during a freeway journey.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1c19874 elementor-widget elementor-widget-text-editor\" data-id=\"1c19874\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>But before that, there had already been a previous breakdown &#8211; not catastrophic, because it was detected in time &#8211; in which the car broke the crankshaft pulley seal.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-665964c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"665964c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c216c64\" data-id=\"c216c64\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e22a56e elementor-widget elementor-widget-text-editor\" data-id=\"e22a56e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>So making a chronological summary, this is what happened:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3db49d4 elementor-widget elementor-widget-text-editor\" data-id=\"3db49d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"text-decoration: underline;\"><strong>First failure:<\/strong><\/span><\/p><ul><li>After about 100 km on the highway: oil leakage due to a broken crankshaft pulley seal. Not a catastrophic failure because it became visible when the car was stationary. <\/li><li>Assuming an old oil seal as the cause, it was replaced (and we also took the opportunity to change the timing pinion).<\/li><li>A few tests, no leakage problems and we considered the failure resolved.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c4aaf3 elementor-widget elementor-widget-text-editor\" data-id=\"9c4aaf3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong><span style=\"text-decoration: underline;\">Second failure:<\/span><\/strong><\/p><ul><li>New exit to the highway after a couple of weeks for a long transfer of the vehicle. Apparently everything normal on the road. <\/li><li>Suddenly, after about 200 km, the oil pressure suddenly dropped to zero, and you could hear the rattling noise in the engine that indicates that something very bad has happened inside the engine. It stopped immediately, but the damage was done. <\/li><li>The crankcase was almost completely emptied. Causing very serious damage to the engine (destroyed crankshaft crankpins, melted connecting rod bushings). Destruction of the lower part of the engine.  <\/li><li>But the curious thing is that the oil had not come out of a specific point, neither through a broken crankcase nor through any visible gasket: there was oil literally everywhere. In other words, the rear part of the engine was simply soaked, as if it had been sprayed: the engine literally seemed to have &#8220;blown&#8221; its own oil out. <\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-3974641 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3974641\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-83b6696\" data-id=\"83b6696\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f516289 elementor-widget-divider--view-line_icon elementor-view-default elementor-widget-divider--element-align-center elementor-widget elementor-widget-divider\" data-id=\"f516289\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon elementor-divider__element\">\n\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-info-circle\"><\/i><\/div>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-c02fbd4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c02fbd4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-06b6614\" data-id=\"06b6614\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3825d1f elementor-widget elementor-widget-heading\" data-id=\"3825d1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What could have happened? Hypothesis of the moment. <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-03fa6f8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"03fa6f8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-08bb943\" data-id=\"08bb943\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-49eee68 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"49eee68\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>At the time it was attributed to a possible crack in the crankcase, deteriorated seals or even to an additive that had been added days before to &#8220;clean&#8221; the lubrication circuit.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2574c2b elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"2574c2b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Be that as it may, as the engine had to be completely disassembled for repair, the reason for the ultimate cause was put on the back burner, assuming that the total rebuild would eliminate it, whatever it might have been.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe8b1f7 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"fe8b1f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-b181e11 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b181e11\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a53da45\" data-id=\"a53da45\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e50803e elementor-widget elementor-widget-heading\" data-id=\"e50803e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Renault Dauphine Gordini engine rebuilding<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-670dafb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"670dafb\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-def2fff\" data-id=\"def2fff\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f644b69 elementor-widget elementor-widget-text-editor\" data-id=\"f644b69\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The second failure led to the need to rebuild the engine. We changed crankshaft (for a completely new one from old stock, a real unicorn found), bushings, liners, pistons, rings, oil pump, water pump, crankcase, block and cylinder head went through a rectifier, and a lot of auxiliary elements. I leave below a few photos, as a small sample of the process.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0338f64 elementor-widget elementor-widget-text-editor\" data-id=\"0338f64\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>If you are in the process of repairing or rebuilding a Ventoux engine and there is anything we can help you with (technical information, any documentation, return of experience, anything), you can <a href=\"https:\/\/www.jgclassics.com\/en\/contact\/\" target=\"_blank\" rel=\"noopener\">contact us<\/a> or send us an email to info@jgclassics.com where I will be happy to share any information that can help you.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-fc0bc15 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fc0bc15\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6bd949c\" data-id=\"6bd949c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6e1747e elementor-widget elementor-widget-gallery\" data-id=\"6e1747e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ideal_row_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:159,&quot;sizes&quot;:[]},&quot;gallery_layout&quot;:&quot;justified&quot;,&quot;ideal_row_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:139,&quot;sizes&quot;:[]},&quot;ideal_row_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:110,&quot;sizes&quot;:[]},&quot;lazyload&quot;:&quot;yes&quot;,&quot;gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;link_to&quot;:&quot;file&quot;,&quot;overlay_background&quot;:&quot;yes&quot;,&quot;content_hover_animation&quot;:&quot;fade-in&quot;}\" data-widget_type=\"gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-gallery__container\">\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair02.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuilding: Assembly of cylinder liners and verification of the height with respect to the plane of the block.\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTEsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC9kYXVwaGluZV9yZXBhaXIwMi5qcGciLCJzbGlkZXNob3ciOiI2ZTE3NDdlIn0%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair02-300x205.jpg\" data-width=\"300\" data-height=\"205\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuild: Crankshaft mounted with bushings. Checking that it turns freely. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTAsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC9kYXVwaGluZV9yZXBhaXIwMS5qcGciLCJzbGlkZXNob3ciOiI2ZTE3NDdlIn0%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/dauphine_repair01-300x178.jpg\" data-width=\"300\" data-height=\"178\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250403_120306-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuild: Cylinder head gasket presented. Verifying correct side of assembly. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTIsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDQwM18xMjAzMDYtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250403_120306-169x300.jpg\" data-width=\"169\" data-height=\"300\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250330_173838-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuild: About to assemble the cylinder head. Use of threaded studs to guide gasket and cylinder head position. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTMsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDMzMF8xNzM4Mzgtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250330_173838-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250330_180923-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: Engine rebuild: Cylinder head assembled\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTQsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDMzMF8xODA5MjMtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250330_180923-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250331_071857-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuild: Checking timing alignment\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTUsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDMzMV8wNzE4NTctc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250331_071857-169x300.jpg\" data-width=\"169\" data-height=\"300\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250404_160655-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: engine rebuild: Almost ready for initial start-up.\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTYsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDQwNF8xNjA2NTUtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250404_160655-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250403_120241-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"Renault Dauphine Gordini: engine rebuilding\" data-elementor-lightbox-description=\"Renault Dauphine Gordini: Engine rebuilding: Cylinder head gasket presented\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTcsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDQwM18xMjAyNDEtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250403_120241-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault Dauphine Gordini. 670-05 engine rebuilding process.\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2024\/07\/08_20240627_175200-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"08_20240627_175200\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjAzNzcsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjRcLzA3XC8wOF8yMDI0MDYyN18xNzUyMDAtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2024\/07\/08_20240627_175200-169x300.jpg\" data-width=\"169\" data-height=\"300\" aria-label=\"\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2024\/07\/08_20240627_175156-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"08_20240627_175156\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjAzNzMsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjRcLzA3XC8wOF8yMDI0MDYyN18xNzUxNTYtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2024\/07\/08_20240627_175156-169x300.jpg\" data-width=\"169\" data-height=\"300\" aria-label=\"\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2024\/07\/11_20240701_120831-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"6e1747e\" data-elementor-lightbox-title=\"11_20240701_120831\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjA0MjksInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjRcLzA3XC8xMV8yMDI0MDcwMV8xMjA4MzEtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjZlMTc0N2UifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2024\/07\/11_20240701_120831-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-3c61edf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3c61edf\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8733ed6\" data-id=\"8733ed6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9f3230f elementor-widget elementor-widget-text-editor\" data-id=\"9f3230f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"text-decoration: underline;\"><strong>Third anomaly (this time not a malfunction, but an anomaly):<\/strong><\/span><\/p><p>Once the engine was rebuilt &#8211; with about 90% of its components new or repaired &#8211; everything seemed normal. Bench tests for a month and about 400 km of running-in on the road with no problems, no leaks, no fluid or compression losses. Everything seemed fine. We were happy with the result of the assembly. Until, in a new trip to the highway, appeared exactly the same symptom: oil level drop, it seemed to be coming out to the outside, and it seemed to come out &#8220;everywhere and nowhere&#8221; at the same time. No gasket was broken or badly assembled. And only on the highway. As if this car dragged the &#8220;curse of the fast lanes&#8221;.       <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e261e2a elementor-widget elementor-widget-text-editor\" data-id=\"e261e2a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Fortunately, this time as the engine was being tested, we were following up very meticulously and observing values and engine status at very short intervals, so nothing happened beyond the realization that the oil level had dropped more than expected -even for a running engine-, and the simple replenishment to the right level: but knowing that it was evident that there was something to finish adjusting.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-076589a elementor-widget elementor-widget-text-editor\" data-id=\"076589a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The clean and new engine made it possible to identify the source of the &#8220;oil spray&#8221;: the drain hole of the clutch bell. That is, the rear exit of the crankshaft towards the gearbox, where there is no oil seal on Ventoux engines. So the oil was coming out of the part of the crankshaft that faces the gearbox. And we saw that oil was coming out of there when we maintained a high and constant engine speed. In order for the &#8220;spray&#8221; or &#8220;airbrush&#8221; effect to happen, the driving wind did the rest.    <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1062515 elementor-widget elementor-widget-text-editor\" data-id=\"1062515\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In any case it seemed impossible that, with everything new in the engine, the same symptom would repeat itself before and after the rebuild. With everything changed, it could be said that the engine was literally &#8220;another&#8221; engine than before. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a984926 elementor-widget elementor-widget-text-editor\" data-id=\"a984926\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>But it was obvious that there had to be a common factor between the &#8220;before&#8221; and the &#8220;now&#8221;.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75b921b elementor-widget elementor-widget-heading\" data-id=\"75b921b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">And then the question came up, \"Has anyone looked at the breather tube on this engine?\"<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-273eb72 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"273eb72\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-bda190a\" data-id=\"bda190a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b39ab27 elementor-widget elementor-widget-image\" data-id=\"b39ab27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Renault Dauphine Gordini. : Engine\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTM2ODQsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjNcLzA0XC8yMDIyMDUxNl8wMDU4MTYtc2NhbGVkLmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-1024x576.jpg\" class=\"attachment-large size-large wp-image-13684\" alt=\"Renault Dauphine Gordini. : Engine\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-1024x576.jpg 1024w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-300x169.jpg 300w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-768x432.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-1536x864.jpg 1536w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2023\/04\/20220516_005816-2048x1152.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b01b053\" data-id=\"b01b053\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9250539 elementor-widget elementor-widget-text-editor\" data-id=\"9250539\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>That tube, on the Ventoux 670-05, is in the rocker cover (on the right in the area closest to the rear of the vehicle). But what had been done with that cover during the rebuild? Simply nothing: it had been stored on a shelf, to be reassembled months later as it was.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-2cb1d04 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2cb1d04\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ec5473e\" data-id=\"ec5473e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44e32dd elementor-widget elementor-widget-text-editor\" data-id=\"44e32dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Upon removal and close examination, the culprit was revealed: The inner area that acts as a &#8220;stilling chamber&#8221; &#8211; so that only gases and no oil escape &#8211; was completely clogged by a thick mass of dried oil and carbon build-up accumulated over 60 years.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-659b838 elementor-widget elementor-widget-gallery\" data-id=\"659b838\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;columns&quot;:3,&quot;columns_tablet&quot;:3,&quot;columns_mobile&quot;:3,&quot;lazyload&quot;:&quot;yes&quot;,&quot;gallery_layout&quot;:&quot;grid&quot;,&quot;gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;link_to&quot;:&quot;file&quot;,&quot;aspect_ratio&quot;:&quot;3:2&quot;,&quot;overlay_background&quot;:&quot;yes&quot;,&quot;content_hover_animation&quot;:&quot;fade-in&quot;}\" data-widget_type=\"gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-gallery__container\">\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250929_220123-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"659b838\" data-elementor-lightbox-title=\"Renault Dauphine 670-05.Rocker cover inner face\" data-elementor-lightbox-description=\"Renault Dauphine 670-05.Rocker cover inner side. In process of cleaning breather (using industrial degreaser for engines). \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTgsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDkyOV8yMjAxMjMtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjY1OWI4MzgifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250929_220123-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault Dauphine 670-05.Rocker cover inner face\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250929_215452-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"659b838\" data-elementor-lightbox-title=\"Renault Dauphine 670-05.Rocker cover inner face\" data-elementor-lightbox-description=\"Renault Dauphine 670-05.Rocker cover inner side. In process of cleaning breather (using industrial degreaser for engines). \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MTksInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDkyOV8yMTU0NTItc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjY1OWI4MzgifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250929_215452-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault Dauphine 670-05.Rocker cover inner face\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250929_215033-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"659b838\" data-elementor-lightbox-title=\"Renault Dauphine 670-05.Rocker cover inner face\" data-elementor-lightbox-description=\"Renault Dauphine 670-05.Rocker cover inner side. In process of cleaning breather from the inside. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MjAsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC8yMDI1MDkyOV8yMTUwMzMtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjY1OWI4MzgifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/20250929_215033-169x300.jpg\" data-width=\"169\" data-height=\"300\" aria-label=\"Renault Dauphine 670-05.Rocker cover inner face\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ca353cd elementor-widget elementor-widget-text-editor\" data-id=\"ca353cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The engine breather was literally clogged. In the three photos above you can see the process of cleaning the rocker cover (using gasoline and then an industrial water-based engine degreaser).   <strong><a href=\"https:\/\/www.quimica-pequinsa.com\/es\/productos.asp?IdContenido=3&amp;IdTipoProducto=11&amp;IdProducto=96#Productos2\" target=\"_blank\" rel=\"noopener\">Pequinsa&#8217;s. You have it in this link <\/a><\/strong>)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-f43a62f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f43a62f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1ea900f\" data-id=\"1ea900f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b973218 elementor-widget elementor-widget-heading\" data-id=\"b973218\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">After cleaning of the rocker cover breather<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9bb3e99 elementor-widget elementor-widget-text-editor\" data-id=\"9bb3e99\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Cleaning the breather alleviated the problem, and for the first time in years on this engine, we could perceive &#8211; at last! \ud83d\ude0a &#8211; how gases were coming out of the breather (you can feel it by simply bringing your hand closer with the engine idling). <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-abd1cae elementor-widget elementor-widget-text-editor\" data-id=\"abd1cae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>But this did not completely eliminate the problem. Although we saw that we were on the right track, we were still seeing some oil coming out of the crankshaft in the clutch bell. Less than before, but some. So it seemed that in our engine the rocker cover breather was insufficient. In our <strong>particular case<\/strong> &#8211; and<strong>only certainly in our case &#8211;<\/strong> it was necessary to replace the closed rocker cover oil plug with a vented one, of the type used on some Ventoux engines (such as the 670-04 the Renault 4CV and or the Renault Juvaquatre). I will explain why later.     <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-b9a0987 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b9a0987\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cd5c51f\" data-id=\"cd5c51f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-37e568d elementor-widget elementor-widget-gallery\" data-id=\"37e568d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;gallery_layout&quot;:&quot;justified&quot;,&quot;ideal_row_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:271,&quot;sizes&quot;:[]},&quot;lazyload&quot;:&quot;yes&quot;,&quot;ideal_row_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:150,&quot;sizes&quot;:[]},&quot;ideal_row_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:150,&quot;sizes&quot;:[]},&quot;gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;link_to&quot;:&quot;file&quot;,&quot;overlay_background&quot;:&quot;yes&quot;,&quot;content_hover_animation&quot;:&quot;fade-in&quot;}\" data-widget_type=\"gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-gallery__container\">\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"37e568d\" data-elementor-lightbox-title=\"vent_plug installed\" data-elementor-lightbox-description=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MDksInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC90YXBvbl92ZW50aWxhZG8tc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjM3ZTU2OGQifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado-169x300.jpg\" data-width=\"169\" data-height=\"300\" aria-label=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini). Installed \" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/Tapon_ventilado_interior-02-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"37e568d\" data-elementor-lightbox-title=\"Inner_ventilated_plug-02\" data-elementor-lightbox-description=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini). Note the peripheral holes to allow the gases to escape. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MjEsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC9UYXBvbl92ZW50aWxhZG9faW50ZXJpb3ItMDItc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjM3ZTU2OGQifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/Tapon_ventilado_interior-02-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini)\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<a class=\"e-gallery-item elementor-gallery-item elementor-animated-content\" href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado_interior-01-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-slideshow=\"37e568d\" data-elementor-lightbox-title=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini)\" data-elementor-lightbox-description=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini). Note the peripheral holes to allow the gases to escape. \" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MjIsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC90YXBvbl92ZW50aWxhZG9faW50ZXJpb3ItMDEtc2NhbGVkLmpwZyIsInNsaWRlc2hvdyI6IjM3ZTU2OGQifQ%3D%3D\">\n\t\t\t\t\t<div class=\"e-gallery-image elementor-gallery-item__image\" data-thumbnail=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/tapon_ventilado_interior-01-300x169.jpg\" data-width=\"300\" data-height=\"169\" aria-label=\"Renault vent plug (valid for all series 4CV, Dauphine, Gordini)\" role=\"img\" ><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-gallery-item__overlay\"><\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-460aa53 elementor-widget elementor-widget-text-editor\" data-id=\"460aa53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>And with this the problem disappeared. Completely. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-b450e1e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b450e1e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-90099ca\" data-id=\"90099ca\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b4de6a4 elementor-widget elementor-widget-heading\" data-id=\"b4de6a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Our particular case. Why (surely) our Renault dauphine needed a vented plug instead of the usual closed one. <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-808ff04 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"808ff04\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4107aac\" data-id=\"4107aac\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3c96e98 elementor-widget elementor-widget-text-editor\" data-id=\"3c96e98\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The reason &#8211; in our particular case &#8211; probably lies in the fact that the new crankshaft installed &#8211; coming from old stock &#8211; is of the &#8220;fine spline&#8221; type, and not of the &#8220;pigtail&#8221; type of the original Gordini (670-05 engine). This is the machining on the crankshaft outlet that keeps the oil from flowing out of it (just as a drill bit displaces the drilled material backwards). <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0d17312 elementor-widget elementor-widget-text-editor\" data-id=\"0d17312\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The fine spline crankshaft is somewhat less effective at retaining oil and possibly requires additional venting, like the 670-04 engines to ensure that there is no overpressure causing oil to leak out of its splines. We fitted that crankshaft because of material availability, and because although it was not exactly the same as the 670-05 Gordini engine it is technically usable and above all it was NEW unused (a real unicorn \ud83d\ude0a) . <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-c910b02 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c910b02\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b408bb9\" data-id=\"b408bb9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-643336f elementor-widget elementor-widget-image\" data-id=\"643336f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-scaled.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pigtail crankshaft\" data-elementor-lightbox-description=\"Renault Dauphine engine - Pigtail crankshaft for oil control (new version)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MjMsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC9jaWd1ZW5hbC1jb2xhLWRlLWNlcmRvLXNjYWxlZC5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"652\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-1024x652.jpg\" class=\"attachment-large size-large wp-image-22523\" alt=\"Renault Dauphine engine - Pigtail crankshaft for oil control (new version)\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-1024x652.jpg 1024w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-300x191.jpg 300w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-768x489.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-1536x978.jpg 1536w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-cola-de-cerdo-2048x1305.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Renault Dauphine engine - Pigtail crankshaft for oil control (new version)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-c9e9edb\" data-id=\"c9e9edb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c98f498 elementor-widget elementor-widget-image\" data-id=\"c98f498\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"crankshaft splines\" data-elementor-lightbox-description=\"Renault Dauphine engine - &quot;Straight spline&quot; crankshaft for oil control (old version)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MjI1MjQsInVybCI6Imh0dHBzOlwvXC93d3cuamdjbGFzc2ljcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzEwXC9jaWd1ZW5hbC1lc3RyaWFzLmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"725\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias-1024x725.jpg\" class=\"attachment-large size-large wp-image-22524\" alt=\"Renault Dauphine engine - &quot;Straight spline&quot; crankshaft for oil control (old version)\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias-1024x725.jpg 1024w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias-300x212.jpg 300w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias-768x544.jpg 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias-1536x1087.jpg 1536w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/ciguenal-estrias-2048x1449.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Renault Dauphine engine - \"Straight spline\" crankshaft for oil control (old version)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-6719e3d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6719e3d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7488568\" data-id=\"7488568\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f5329a4 elementor-widget elementor-widget-text-editor\" data-id=\"f5329a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This is certainly a hypothesis, but the facts support it: Now, with the cap vent clean and the vented cap installed, the problem disappeared completely, confirmed after a route of more than 400 km in all kinds of conditions (car loaded with three people and luggage, highway, mountain pass at 1500 m, altitude, etc.).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9af891 elementor-widget elementor-widget-text-editor\" data-id=\"c9af891\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"text-decoration: underline;\"><strong>Summary<\/strong><\/span><\/p><ul><li>In the first failure (breakage of the front crankshaft seal), the seal was not the cause, but the victim of the overpressure.<\/li><li>En la segunda aver\u00eda (la catastr\u00f3fica), el aceite probablemente escap\u00f3 por la parte trasera del cig\u00fce\u00f1al, a trav\u00e9s de la estr\u00eda tipo \u201ccola de cerdo\u201d. Reparado el ret\u00e9n de la polea de cig\u00fce\u00f1al, la \u00fanica v\u00eda de salida a la brutal presi\u00f3n interior -debido a que el \u00fanico respiradero disponible estaba completamente obstruido- eran las mencionadas estr\u00edas.  <\/li><li>In the third anomaly, and working only with the rocker cover breather -once it was cleaned- and non-vented cap version, the oil came out again from the rear of the crankshaft (clutch-gearbox side), due to internal pressure in the crankcase. Perhaps manageable with the original &#8220;pigtail&#8221; crankshaft of the 607-05 Gordini engine (more modern and effective in retaining oil) but still too much pressure for the less effective &#8220;smooth spline&#8221; crankshaft to contain the oil leakage and therefore more sensitive to the slightest overpressure. Overpressure which, eliminated by the vented plug of the 670-04, led to the complete solution of the problem.  <\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c440267 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"c440267\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-b9fde3f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b9fde3f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3bc99e0\" data-id=\"3bc99e0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3d7a737 elementor-widget elementor-widget-heading\" data-id=\"3d7a737\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-f321db8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f321db8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-15a301d\" data-id=\"15a301d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f97c851 elementor-widget elementor-widget-text-editor\" data-id=\"f97c851\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The correct ventilation of the crankcase in Ventoux engines is a critical point to check, especially in these vehicles (Renault 4CV, Dauphine, Gordini), all of them with more than 60 years of experience, where it is easy to find partial or total obstructions in the ventilation ducts that also trust all their efficiency to the simple direct exit to the atmosphere.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01de84a elementor-widget elementor-widget-text-editor\" data-id=\"01de84a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>If you notice that your engine is leaking oil that you cannot explain due to an internal engine problem or you observe leaks that seem to have no logic as to the exit point, check the crankcase ventilation because you may be in for a surprise and you may be able to solve your problem relatively easily.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c64e436 elementor-widget elementor-widget-text-editor\" data-id=\"c64e436\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In the next installment, I&#8217;ll give you more details of the<strong><a href=\"https:\/\/www.jgclassics.com\/en\/2025\/10\/22\/crankcase-ventilation-systems-on-ventoux-engines\/\" target=\"_blank\" rel=\"noopener\"> crankcase ventilation and breathing system of the Ventoux engines and what solutions Renault adopted<\/a><\/strong> and what solutions Renault adopted during the different stages of its life.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-92a99b8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"92a99b8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8a21f9a\" data-id=\"8a21f9a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-353d172 elementor-widget elementor-widget-image\" data-id=\"353d172\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.jgclassics.com\/en\/2025\/10\/22\/crankcase-ventilation-systems-on-ventoux-engines\/\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"658\" src=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-1024x658.png\" class=\"attachment-large size-large wp-image-22525\" alt=\"Renault Dauphine rocker cover. Ventoux engine\" srcset=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-1024x658.png 1024w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-300x193.png 300w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-768x494.png 768w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-1536x987.png 1536w, https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina.png 1792w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-482aae8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"482aae8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9a2409d\" data-id=\"9a2409d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-e3f2de0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e3f2de0\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bf85223\" data-id=\"bf85223\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>A problem in the engine breather is often the cause of oil leaks, excessive apparent consumption, or unexplained drops in oil level. And it is often overlooked. <\/p>\n","protected":false},"author":1,"featured_media":22525,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[496],"tags":[],"class_list":["post-22527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>My car leaks oil (V) - Engine breather problems. Crankcase ventilation<\/title>\n<meta name=\"description\" content=\"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"My classic car is leaking oil (V) - Engine breather and crankcase ventilation problems\" \/>\n<meta property=\"og:description\" content=\"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/\" \/>\n<meta property=\"og:site_name\" content=\"JG Classics : The thrill of time travel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=100086454427345\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-18T12:06:49+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-28T15:46:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-1024x658.png\" \/>\n<meta name=\"author\" content=\"JG Classics Administrator\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" content=\"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"JG Classics Administrator\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/\"},\"author\":{\"name\":\"JG Classics Administrator\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#\\\/schema\\\/person\\\/c90c7d27489a18da844c6085e5641f8d\"},\"headline\":\"My classic car is leaking oil (V) &#8211; Engine breather and crankcase ventilation problems\",\"datePublished\":\"2025-10-18T12:06:49+00:00\",\"dateModified\":\"2025-10-28T15:46:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/\"},\"wordCount\":2222,\"publisher\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.jgclassics.com\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/pie-pagina.png\",\"articleSection\":[\"News\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/\",\"url\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/\",\"name\":\"My car leaks oil (V) - Engine breather problems. Crankcase ventilation\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.jgclassics.com\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/pie-pagina.png\",\"datePublished\":\"2025-10-18T12:06:49+00:00\",\"dateModified\":\"2025-10-28T15:46:56+00:00\",\"description\":\"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.jgclassics.com\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/pie-pagina.png\",\"contentUrl\":\"https:\\\/\\\/www.jgclassics.com\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/pie-pagina.png\",\"width\":1792,\"height\":1152,\"caption\":\"Renault Dauphine rocker cover. Ventoux engine\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/2025\\\/10\\\/18\\\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Inicio\",\"item\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/jg-classics-classic-and-historic-cars-to-travel-back-in-time\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"My classic car is leaking oil (V) &#8211; Engine breather and crankcase ventilation problems\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/\",\"name\":\"JG Classics : The thrill of time travel\",\"description\":\"Classic cars, historic cars: Rental, support for restorations, technical information and purchase of material\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#organization\"},\"alternateName\":\"JG Classics - Coches cl\u00e1sicos e hist\u00f3ricos - Alquiler, blogs, informaci\u00f3n, art\u00edculos\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#organization\",\"name\":\"JG Classics : The thrill of time travel\",\"alternateName\":\"JG Classics\",\"url\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.jgclassics.com\\\/wp-content\\\/uploads\\\/2022\\\/10\\\/Color-logo-with-background.svg\",\"contentUrl\":\"https:\\\/\\\/www.jgclassics.com\\\/wp-content\\\/uploads\\\/2022\\\/10\\\/Color-logo-with-background.svg\",\"width\":3171,\"height\":2303,\"caption\":\"JG Classics : The thrill of time travel\"},\"image\":{\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=100086454427345\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/#\\\/schema\\\/person\\\/c90c7d27489a18da844c6085e5641f8d\",\"name\":\"JG Classics Administrator\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ededfcc22765048d597870dfa6024bcb30f5c6fa35cd8cf28a5f1ac6e0067a31?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ededfcc22765048d597870dfa6024bcb30f5c6fa35cd8cf28a5f1ac6e0067a31?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ededfcc22765048d597870dfa6024bcb30f5c6fa35cd8cf28a5f1ac6e0067a31?s=96&d=mm&r=g\",\"caption\":\"JG Classics Administrator\"},\"sameAs\":[\"https:\\\/\\\/www.jgclassics.com\"],\"url\":\"https:\\\/\\\/www.jgclassics.com\\\/en\\\/author\\\/jgclassics_hikp0z\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"My car leaks oil (V) - Engine breather problems. Crankcase ventilation","description":"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/","og_locale":"en_US","og_type":"article","og_title":"My classic car is leaking oil (V) - Engine breather and crankcase ventilation problems","og_description":"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent","og_url":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/","og_site_name":"JG Classics : The thrill of time travel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=100086454427345","article_published_time":"2025-10-18T12:06:49+00:00","article_modified_time":"2025-10-28T15:46:56+00:00","og_image":[{"url":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina-1024x658.png","type":"","width":"","height":""}],"author":"JG Classics Administrator","twitter_card":"summary_large_image","twitter_description":"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent","twitter_misc":{"Written by":"JG Classics Administrator","Est. reading time":"11 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#article","isPartOf":{"@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/"},"author":{"name":"JG Classics Administrator","@id":"https:\/\/www.jgclassics.com\/en\/#\/schema\/person\/c90c7d27489a18da844c6085e5641f8d"},"headline":"My classic car is leaking oil (V) &#8211; Engine breather and crankcase ventilation problems","datePublished":"2025-10-18T12:06:49+00:00","dateModified":"2025-10-28T15:46:56+00:00","mainEntityOfPage":{"@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/"},"wordCount":2222,"publisher":{"@id":"https:\/\/www.jgclassics.com\/en\/#organization"},"image":{"@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#primaryimage"},"thumbnailUrl":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina.png","articleSection":["News"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/","url":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/","name":"My car leaks oil (V) - Engine breather problems. Crankcase ventilation","isPartOf":{"@id":"https:\/\/www.jgclassics.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#primaryimage"},"image":{"@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#primaryimage"},"thumbnailUrl":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina.png","datePublished":"2025-10-18T12:06:49+00:00","dateModified":"2025-10-28T15:46:56+00:00","description":"When oil leakage or apparent oil consumption problems occur, we often forget one item to check: The crankcase gas vent","breadcrumb":{"@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#primaryimage","url":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina.png","contentUrl":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2025\/10\/pie-pagina.png","width":1792,"height":1152,"caption":"Renault Dauphine rocker cover. Ventoux engine"},{"@type":"BreadcrumbList","@id":"https:\/\/www.jgclassics.com\/en\/2025\/10\/18\/my-classic-car-is-leaking-oil-v-engine-breather-and-crankcase-ventilation-problems\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Inicio","item":"https:\/\/www.jgclassics.com\/en\/jg-classics-classic-and-historic-cars-to-travel-back-in-time\/"},{"@type":"ListItem","position":2,"name":"My classic car is leaking oil (V) &#8211; Engine breather and crankcase ventilation problems"}]},{"@type":"WebSite","@id":"https:\/\/www.jgclassics.com\/en\/#website","url":"https:\/\/www.jgclassics.com\/en\/","name":"JG Classics : The thrill of time travel","description":"Classic cars, historic cars: Rental, support for restorations, technical information and purchase of material","publisher":{"@id":"https:\/\/www.jgclassics.com\/en\/#organization"},"alternateName":"JG Classics - Coches cl\u00e1sicos e hist\u00f3ricos - Alquiler, blogs, informaci\u00f3n, art\u00edculos","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.jgclassics.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.jgclassics.com\/en\/#organization","name":"JG Classics : The thrill of time travel","alternateName":"JG Classics","url":"https:\/\/www.jgclassics.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.jgclassics.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/10\/Color-logo-with-background.svg","contentUrl":"https:\/\/www.jgclassics.com\/wp-content\/uploads\/2022\/10\/Color-logo-with-background.svg","width":3171,"height":2303,"caption":"JG Classics : The thrill of time travel"},"image":{"@id":"https:\/\/www.jgclassics.com\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=100086454427345"]},{"@type":"Person","@id":"https:\/\/www.jgclassics.com\/en\/#\/schema\/person\/c90c7d27489a18da844c6085e5641f8d","name":"JG Classics Administrator","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/ededfcc22765048d597870dfa6024bcb30f5c6fa35cd8cf28a5f1ac6e0067a31?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ededfcc22765048d597870dfa6024bcb30f5c6fa35cd8cf28a5f1ac6e0067a31?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ededfcc22765048d597870dfa6024bcb30f5c6fa35cd8cf28a5f1ac6e0067a31?s=96&d=mm&r=g","caption":"JG Classics Administrator"},"sameAs":["https:\/\/www.jgclassics.com"],"url":"https:\/\/www.jgclassics.com\/en\/author\/jgclassics_hikp0z\/"}]}},"_links":{"self":[{"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/posts\/22527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/comments?post=22527"}],"version-history":[{"count":5,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/posts\/22527\/revisions"}],"predecessor-version":[{"id":23182,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/posts\/22527\/revisions\/23182"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/media\/22525"}],"wp:attachment":[{"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/media?parent=22527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/categories?post=22527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jgclassics.com\/en\/wp-json\/wp\/v2\/tags?post=22527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}