{"id":40822,"date":"2025-03-03T08:35:58","date_gmt":"2025-03-03T08:35:58","guid":{"rendered":"https:\/\/www.dayco.com\/?post_type=techhub&#038;p=40822"},"modified":"2025-03-04T11:48:21","modified_gmt":"2025-03-04T11:48:21","slug":"entretien-approprie-du-circuit-de-refroidissement-dune-voiture","status":"publish","type":"techhub","link":"https:\/\/www.dayco.com\/na-fr\/techhub\/entretien-approprie-du-circuit-de-refroidissement-dune-voiture\/","title":{"rendered":"Entretien appropri\u00e9 du circuit de refroidissement d\u2019une voiture"},"content":{"rendered":"[vc_row type=\u00a0\u00bbfull_width_background\u00a0\u00bb full_screen_row_position=\u00a0\u00bbmiddle\u00a0\u00bb column_margin=\u00a0\u00bbdefault\u00a0\u00bb column_direction=\u00a0\u00bbdefault\u00a0\u00bb column_direction_tablet=\u00a0\u00bbdefault\u00a0\u00bb column_direction_phone=\u00a0\u00bbdefault\u00a0\u00bb bg_color=\u00a0\u00bb#f4f4f4&Prime; scene_position=\u00a0\u00bbcenter\u00a0\u00bb text_color=\u00a0\u00bbdark\u00a0\u00bb text_align=\u00a0\u00bbleft\u00a0\u00bb row_border_radius=\u00a0\u00bbnone\u00a0\u00bb row_border_radius_applies=\u00a0\u00bbbg\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb shape_divider_position=\u00a0\u00bbbottom\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb shape_type=\u00a0\u00bb\u00a0\u00bb][vc_column column_padding=\u00a0\u00bbpadding-4-percent\u00a0\u00bb column_padding_tablet=\u00a0\u00bbinherit\u00a0\u00bb column_padding_phone=\u00a0\u00bbinherit\u00a0\u00bb column_padding_position=\u00a0\u00bball\u00a0\u00bb column_element_direction_desktop=\u00a0\u00bbdefault\u00a0\u00bb column_element_spacing=\u00a0\u00bbdefault\u00a0\u00bb desktop_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb tablet_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb phone_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb background_color_opacity=\u00a0\u00bb1&Prime; background_hover_color_opacity=\u00a0\u00bb1&Prime; column_backdrop_filter=\u00a0\u00bbnone\u00a0\u00bb column_shadow=\u00a0\u00bbnone\u00a0\u00bb column_border_radius=\u00a0\u00bbnone\u00a0\u00bb column_link_target=\u00a0\u00bb_self\u00a0\u00bb column_position=\u00a0\u00bbdefault\u00a0\u00bb gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; width=\u00a0\u00bb1\/1&Prime; tablet_width_inherit=\u00a0\u00bbdefault\u00a0\u00bb animation_type=\u00a0\u00bbdefault\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb border_type=\u00a0\u00bbsimple\u00a0\u00bb column_border_width=\u00a0\u00bbnone\u00a0\u00bb column_border_style=\u00a0\u00bbsolid\u00a0\u00bb][vc_custom_heading source=\u00a0\u00bbpost_title\u00a0\u00bb font_container=\u00a0\u00bbtag:h1|text_align:left\u00a0\u00bb use_theme_fonts=\u00a0\u00bbyes\u00a0\u00bb][vc_custom_heading text=\u00a0\u00bbChoisir la bonne formule et le bon rapport est essentiel pour \u00e9viter les d\u00e9faillances de pi\u00e8ces\u00a0\u00bb use_theme_fonts=\u00a0\u00bbyes\u00a0\u00bb][divider line_type=\u00a0\u00bbSmall Line\u00a0\u00bb line_alignment=\u00a0\u00bbdefault\u00a0\u00bb line_thickness=\u00a0\u00bb2&Prime; divider_color=\u00a0\u00bbaccent-color\u00a0\u00bb animate=\u00a0\u00bbyes\u00a0\u00bb custom_height=\u00a0\u00bb40&Prime; custom_line_width=\u00a0\u00bb130&Prime;][vc_column_text css=\u00a0\u00bb.vc_custom_1631890115647{margin-bottom: 50px !important;}\u00a0\u00bb]Il est extr\u00eamement important de rincer et de remplir le circuit de refroidissement avec un liquide de refroidissement recommand\u00e9 par l\u2019OEM, que vous effectuiez simplement l\u2019entretien du circuit de refroidissement ou que vous changiez une pompe \u00e0 eau. Cela permettra d\u2019\u00e9viter une d\u00e9faillance pr\u00e9matur\u00e9e des pi\u00e8ces.<\/p>\n<p>Les liquides de refroidissement ont chang\u00e9 de fa\u00e7on spectaculaire au cours des 20\u00a0derni\u00e8res ann\u00e9es. En 1996, GM a lanc\u00e9 DexCool, un liquide de refroidissement bas\u00e9 sur la technologie d\u2019acide organique (OAT). Depuis, la plupart des autres constructeurs automobiles ont adopt\u00e9 des liquides de refroidissement bas\u00e9s sur la technologie OAT. Les constructeurs asiatiques utilisent une version appel\u00e9e PHOAT, qui est un hybride de l\u2019OAT \u00e0 base de phosphate. Cependant, le liquide de refroidissement au silicate repr\u00e9sente toujours pr\u00e8s de 60\u00a0% de toutes les ventes d\u2019antigel, alors que les estimations sugg\u00e8rent que ces chiffres devraient \u00eatre plus proches de 20\u00a0%. Cette diff\u00e9rence signifie que beaucoup de travaux d\u2019entretien sont probablement effectu\u00e9s avec un mauvais liquide de refroidissement.<\/p>\n<p><strong>R\u00f4le des inhibiteurs dans un antigel ou un liquide de refroidissement<\/strong><\/p>\n<p>Les inhibiteurs sont les composants les plus importants dans la formulation d\u2019un liquide de refroidissement, car ils contribuent \u00e0 prot\u00e9ger le circuit de refroidissement et les autres composants contre l\u2019\u00e9rosion par cavitation, la corrosion, la rouille, le tartre et la mousse. Il ne s\u2019agit pas seulement de la qualit\u00e9 des inhibiteurs utilis\u00e9s, mais aussi de la quantit\u00e9 et du m\u00e9lange de chaque inhibiteur, qui fournissent au circuit de refroidissement la protection ultime.Les inhibiteurs constituent 1,5 \u00e0 4\u00a0% du concentr\u00e9, selon qu\u2019il s\u2019agit de compos\u00e9s inorganiques, de compos\u00e9s organiques ou d\u2019une combinaison des deux.<\/p>\n<p>Tous les inhibiteurs disposent d\u2019un certain niveau de protection en termes de temps ou de kilom\u00e9trage par l\u2019OEM pour les liquides de refroidissement remplis \u00e0 l\u2019usine. La dur\u00e9e de la protection peut \u00eatre affect\u00e9e par des influences ext\u00e9rieures, telles que la qualit\u00e9 de l\u2019eau, les surchauffes, une contamination ou une concentration excessive d\u2019inhibiteurs.<\/p>\n<p>Lors de l\u2019utilisation d\u2019un liquide de refroidissement bas\u00e9 sur une technologie d\u2019acide inorganique dans des v\u00e9hicules modernes, et lorsque le liquide de refroidissement n\u2019est pas remplac\u00e9 selon un calendrier d\u2019entretien appropri\u00e9, les inhibiteurs peuvent s\u2019\u00e9puiser ou dispara\u00eetre apr\u00e8s plusieurs ann\u00e9es d\u2019utilisation. Cela peut entra\u00eener de la corrosion, de la rouille ou des particules solides dans le circuit de refroidissement. Ces particules solides peuvent \u00eatre abrasives pour les joints de la pompe \u00e0 eau et peuvent n\u00e9cessiter un remplacement pr\u00e9matur\u00e9 de la pompe \u00e0 eau. Les particules solides pr\u00e9sentes dans le circuit de refroidissement peuvent \u00e9galement provoquer des d\u00e9p\u00f4ts dans les \u00e9changeurs de chaleur, entra\u00eenant un mauvais transfert de chaleur, une surchauffe locale et des r\u00e9parations inutiles.<\/p>\n<p><strong>Rapport antigel\/liquide de refroidissement\/eau<\/strong><\/p>\n<p>Lorsqu\u2019il est utilis\u00e9 dans un v\u00e9hicule, le concentr\u00e9 de liquide de refroidissement est m\u00e9lang\u00e9 \u00e0 de l\u2019eau dans un rapport compris entre 40 et 60\u00a0%, afin d\u2019offrir une protection optimale du point de cong\u00e9lation, du contr\u00f4le de l\u2019\u00e9bullition et du transfert de chaleur. Dans le cas d\u2019un liquide de refroidissement enti\u00e8rement concentr\u00e9 ou pr\u00e9m\u00e9lang\u00e9 \u00e0 50\/50, les inhibiteurs constituent un facteur de diff\u00e9renciation cl\u00e9 pour la protection contre la corrosion.<\/p>\n<p>Aux \u00c9tats-Unis, la plupart des fabricants d\u2019\u00e9quipement d\u2019origine remplissent les v\u00e9hicules en usine avec un rapport eau\/liquide de refroidissement de 50:50. En g\u00e9n\u00e9ral, ils recommandent de ne pas d\u00e9passer un rapport 40:60. Dans les climats tr\u00e8s froids, le rapport eau\/liquide de refroidissement peut \u00eatre de 30:70. Cependant, si vous ne faites pas attention et que le rapport comprend moins de 30\u00a0% de liquide de refroidissement, le v\u00e9hicule peut se retrouver avec des points de cong\u00e9lation \u00e9lev\u00e9s et des points d\u2019\u00e9bullition plus bas. D\u2019autres probl\u00e8mes peuvent survenir, notamment une corrosion du m\u00e9tal, des piq\u00fbres de la pompe \u00e0 eau et une surchauffe locale.<\/p>\n<p>Les probl\u00e8mes susceptibles de survenir si la concentration en liquide de refroidissement est sup\u00e9rieure \u00e0 70\u00a0% sont un mauvais transfert de chaleur, des points de cong\u00e9lation plus \u00e9lev\u00e9s et des temp\u00e9ratures de m\u00e9tal plus \u00e9lev\u00e9es, ce qui peut \u00e9galement entra\u00eener une surchauffe locale. De plus, le v\u00e9hicule peut produire une pr\u00e9cipitation des additifs, appel\u00e9e \u00ab\u00a0chute des inhibiteurs\u00a0\u00bb, qui peut entra\u00eener la formation d\u2019une boue de liquide de refroidissement, ainsi qu\u2019une fuite au niveau de la pompe \u00e0 eau.<\/p>\n<p>Quoi que vous fassiez, assurez-vous que lorsque vous effectuez un rin\u00e7age et un remplissage, ou lorsque vous remplacez la pompe \u00e0 eau, vous utilisez toujours le produit chimique de refroidissement sp\u00e9cifi\u00e9 par l\u2019OEM. Le joint de la pompe est con\u00e7u pour fonctionner uniquement avec ce produit chimique.[\/vc_column_text][\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"<p>Il est extr\u00eamement important de rincer et de remplir le circuit de refroidissement avec un liquide de refroidissement recommand\u00e9 par\u2026<\/p>\n","protected":false},"featured_media":38770,"menu_order":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"topic":[2001],"contenttype":[2223],"th_application":[2294],"th_product":[],"class_list":["post-40822","techhub","type-techhub","status-publish","has-post-thumbnail","topic-selection-de-produit","contenttype-articles-techniques","th_application-automobile"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Dayco | Entretien appropri\u00e9 du circuit de refroidissement d\u2019une voiture - NAM | FR<\/title>\n<meta name=\"description\" content=\"Il est extr\u00eamement important de rincer et de remplir le circuit de refroidissement avec un liquide de refroidissement recommand\u00e9 par l\u2019OEM. 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