{"id":416268,"date":"2016-02-26T10:20:50","date_gmt":"2016-02-26T10:20:50","guid":{"rendered":"http:\/\/www.tunisietuning.com\/magazine\/?p=416268"},"modified":"2017-03-23T08:46:33","modified_gmt":"2017-03-23T08:46:33","slug":"les-bougies-de-prechauffage","status":"publish","type":"post","link":"https:\/\/motors.tn\/magazine\/entretien\/les-bougies-de-prechauffage\/","title":{"rendered":"Les bougies de pr\u00e9chauffage"},"content":{"rendered":"<p style=\"text-align: justify;\">Les bougies de pr\u00e9chauffage sont une pi\u00e8ce essentielle et sp\u00e9cifique aux moteurs \u00e0 diesel. En effet, contrairement aux moteurs \u00e0 essence, les moteurs \u00e0 gasoil n\u2019ont pas besoin de bougies d\u2019allumage, car le principe de fonctionnement du moteur n\u2019est pas le m\u00eame. Sur un moteur \u00e0 essence, l\u2019explosion au sein de la chambre de combustion se fait gr\u00e2ce \u00e0 une \u00e9tincelle provoqu\u00e9e par une bougie d\u2019allumage, et un m\u00e9lange de carburant et d\u2019air. Le diesel n\u2019\u00e9tant pas un carburant inflammable par \u00e9tincelle, il br\u00fble cependant dans des conditions de temp\u00e9ratures et de pressions diff\u00e9rentes. Les bougies de pr\u00e9chauffages assurent donc une bonne temp\u00e9rature aux d\u00e9marrages, sp\u00e9cialement ceux \u00e0 froid, le m\u00e9lange air-diesel \u00e9tant comprim\u00e9 et chauff\u00e9 \u00e0 800\u00b0C dans les chambres.<\/p>\n<p style=\"text-align: justify;\"><strong>Comment identifier une fatigue des bougies de pr\u00e9chauffage\u00a0?<\/strong><\/p>\n<p style=\"text-align: justify;\">Une difficult\u00e9 \u00e0 d\u00e9marrer la voiture \u00e0 froid est g\u00e9n\u00e9ralement le sympt\u00f4me le plus \u00e9difiant quant \u00e0 l\u2019usure d\u2019une (ou plusieurs) bougies de pr\u00e9chauffages. En fait, si le voyant (en forme de ressort orang\u00e9) mets beaucoup de temps \u00e0 s\u2019\u00e9teindre (surtout quand il ne fait pas trop froid), ne s\u2019allume pas du tout, ou que le moteur ne d\u00e9marre qu\u2019au bout de plusieurs tentatives, il est pr\u00e9f\u00e9rable d\u2019inspecter les bougies de pr\u00e9chauffages. Parfois l\u2019usure provoque m\u00eame l\u2019impossibilit\u00e9 de d\u00e9marrer le v\u00e9hicule.<\/p>\n<p style=\"text-align: justify;\">\u00a0<strong>Ce que Motors.tn\u00a0pr\u00e9conise\u00a0:<\/strong><\/p>\n<p style=\"text-align: justify;\">L\u2019intervalle d&rsquo;un changement id\u00e9al des bougies de pr\u00e9chauffages est de chaque 120000 Km parcouru. Cela reste bien-entendu \u00e0 titre indicatif car l&rsquo;on pourrait \u00eatre amen\u00e9 \u00e0 les changer plus t\u00f4t pour maintes raisons, le plus souvent \u00e0 cause de la marque de la bougie elle-m\u00eame tr\u00e8s variable en durabilit\u00e9. Nous pr\u00e9conisons aussi de changer toutes les bougies pr\u00e9sentes sur un moteur (quatre sur un moteur 4 cylindres par exemple) car m\u00eame si une seule des bougies pr\u00e9sente une faiblesse, la changer uniquement pourrait d\u00e9caler les cylindres au d\u00e9marrage moteur et ainsi provoquer une vibration \u00e0 froid voire m\u00eame un d\u00e9faut moteur.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les bougies de pr\u00e9chauffage sont une pi\u00e8ce essentielle et sp\u00e9cifique aux moteurs \u00e0 diesel. En effet, contrairement aux moteurs \u00e0 essence, les moteurs \u00e0 gasoil n\u2019ont pas besoin de bougies d\u2019allumage, car le principe de fonctionnement du moteur n\u2019est pas le m\u00eame. Sur un moteur \u00e0 essence, l\u2019explosion au sein de la chambre de combustion &#8230; <a title=\"Les bougies de pr\u00e9chauffage\" class=\"read-more\" href=\"https:\/\/motors.tn\/magazine\/entretien\/les-bougies-de-prechauffage\/\" aria-label=\"En savoir plus sur Les bougies de pr\u00e9chauffage\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":416278,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[127],"tags":[],"class_list":["post-416268","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-entretien"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les bougies de pr\u00e9chauffage : Sympt\u00f4mes et conseils<\/title>\n<meta name=\"description\" content=\"Les bougies de pr\u00e9chauffage sont une pi\u00e8ce essentielle et sp\u00e9cifique aux moteurs \u00e0 diesel. En effet, contrairement aux moteurs \u00e0 essence, les moteurs \u00e0 gasoil n\u2019ont pas besoin de bougies d\u2019allumage,\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/motors.tn\/magazine\/entretien\/les-bougies-de-prechauffage\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les bougies de pr\u00e9chauffage : Sympt\u00f4mes et conseils\" \/>\n<meta property=\"og:description\" content=\"Les bougies de pr\u00e9chauffage sont une pi\u00e8ce essentielle et sp\u00e9cifique aux moteurs \u00e0 diesel. 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