{"id":2462,"date":"2026-03-27T06:40:12","date_gmt":"2026-03-27T06:40:12","guid":{"rendered":"https:\/\/yzdlparts.com\/?p=2462"},"modified":"2026-03-27T07:32:14","modified_gmt":"2026-03-27T07:32:14","slug":"man-l27-38-maintenance-guide","status":"publish","type":"post","link":"https:\/\/yzdlparts.com\/fr\/maintenance-guide\/man-l27-38-maintenance-guide\/","title":{"rendered":"MAN L27\/38 Diesel Engine : Guide complet d'entretien et de maintenance"},"content":{"rendered":"<h2 class=\"wp-block-heading\">MAN L27\/38 <a href=\"https:\/\/yzdlparts.com\/fr\/cummins-diesel-engines\/\" title=\"\">Moteur diesel<\/a> - D\u00e9pose de la culasse<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"773\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-773x1024.webp\" alt=\"MAN L27\/38 Cylinder Head\" class=\"wp-image-2463\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-773x1024.webp 773w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-226x300.webp 226w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-768x1018.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-1159x1536.webp 1159w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-1546x2048.webp 1546w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_20260327135448_1180_1871.webp 1932w\" sizes=\"(max-width: 773px) 100vw, 773px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-1024x768.webp\" alt=\"MAN L27\/38 Cylinder Head\" class=\"wp-image-2464\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-1024x768.webp 1024w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-300x225.webp 300w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-768x576.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-1536x1152.webp 1536w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-2048x1536.webp 2048w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132944_0841-16x12.webp 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u00e9montage : Conduites de carburant \u00e0 haute pression, conduites d'air de d\u00e9marrage, conduites d'eau de refroidissement, conduites d'\u00e9chappement, capteurs et soupapes indicatrices.<br>\u200b<\/li>\n\n\n\n<li>Retirer les couvercles de protection des boulons de la culasse ; installer les tendeurs hydrauliques ; desserrer les \u00e9crous en suivant un sch\u00e9ma sym\u00e9trique et transversal.<br>\u200b<\/li>\n\n\n\n<li>Sp\u00e9cifications typiques des moteurs diesel MAN 27\/38 : Pression d'huile de 1200 bar.<br>\u200b<\/li>\n\n\n\n<li>\u00c0 l'aide d'un outil de levage sp\u00e9cialis\u00e9, soulever avec pr\u00e9caution la culasse ; retirer verticalement le joint de culasse (le remplacer par un nouveau).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">MAN L27\/38 <a href=\"https:\/\/yzdlparts.com\/fr\/cummins-x15-engine-parts\/\" title=\"\">Moteur diesel<\/a> - D\u00e9pose du piston et de la bielle<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391-768x1024.webp\" alt=\"MAN L27\/38 Cylinder liner\" class=\"wp-image-2465\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391-768x1024.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391-225x300.webp 225w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391-1152x1536.webp 1152w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391-1536x2048.webp 1536w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_132959_1391.webp 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971-768x1024.webp\" alt=\"MAN L27\/38 Connecting Rod\" class=\"wp-image-2466\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971-768x1024.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971-225x300.webp 225w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971-1152x1536.webp 1152w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971-1536x2048.webp 1536w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133025_3971.webp 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281-768x1024.webp\" alt=\"MAN L27\/38 Connecting Rod\" class=\"wp-image-2467\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281-768x1024.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281-225x300.webp 225w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281-1152x1536.webp 1152w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281-1536x2048.webp 1536w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133020_2281.webp 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faire tourner le moteur \u00e0 proximit\u00e9 du point mort haut (PMH) et nettoyer le trou de levage sur la couronne du piston.<\/li>\n\n\n\n<li>Ouvrir les portes d'inspection du carter de vilebrequin ; retirer le chapeau de palier du gros bout de la bielle et les coussinets, et appliquer les marques correspondantes.<\/li>\n\n\n\n<li>Fixer l'outil sp\u00e9cialis\u00e9 de levage de piston et extraire lentement et verticalement l'ensemble piston-tige de connexion.<\/li>\n\n\n\n<li>Placez l'ensemble sur un support sp\u00e9cialis\u00e9 pour prot\u00e9ger le piston, les segments, les coussinets et la tige de piston.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Moteur diesel MAN L27\/38 - <a href=\"https:\/\/yzdlparts.com\/fr\/cummins-x15-engine-parts\/\" title=\"Chemise de cylindre\">Chemise de cylindre<\/a> D\u00e9m\u00e9nagement<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961-768x1024.webp\" alt=\"MAN L27\/38 Cylinder liner\" class=\"wp-image-2468\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961-768x1024.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961-225x300.webp 225w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961-1152x1536.webp 1152w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961-1536x2048.webp 1536w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/\u5fae\u4fe1\u56fe\u7247_2026-03-27_133029_8961.webp 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Retirer les tuyaux d'entr\u00e9e et de sortie de l'eau de refroidissement de la chemise de cylindre ; mesurer la temp\u00e9rature et lubrifier.<br>\u200b<\/li>\n\n\n\n<li>\u00c0 l'aide d'outils sp\u00e9cialis\u00e9s, la chemise de cylindre est extraite en douceur ; la chemise d'eau et les bagues d'\u00e9tanch\u00e9it\u00e9 sont inspect\u00e9es et la corrosion est v\u00e9rifi\u00e9e.<br>\u200b<\/li>\n\n\n\n<li>Nettoyer l'al\u00e9sage du bloc-cylindres ; remplacer les bagues d'\u00e9tanch\u00e9it\u00e9.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Nettoyage et inspection (critiques)<\/h2>\n\n\n\n<p>1) Culasse<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nettoyer les d\u00e9p\u00f4ts de carbone ; inspecter les orifices des soupapes et la chambre d'eau de refroidissement pour d\u00e9tecter les fissures et la corrosion.<\/li>\n\n\n\n<li>D\u00e9monter et inspecter les soupapes d'admission et d'\u00e9chappement, les si\u00e8ges de soupapes, tester la pression (5 kg), mesurer les tubes de guidage, les ressorts et les poign\u00e9es de soupapes.<\/li>\n\n\n\n<li>Meuler les surfaces d'\u00e9tanch\u00e9it\u00e9 ; effectuer un essai d'\u00e9tanch\u00e9it\u00e9 ; plan\u00e9it\u00e9 \u2264 0,05 mm.<\/li>\n<\/ul>\n\n\n\n<p>2) Piston et segments<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nettoyer la partie sup\u00e9rieure, les rainures des bagues et les d\u00e9p\u00f4ts de carbone dans la chambre de refroidissement (ne pas utiliser de brosses m\u00e9talliques).<\/li>\n\n\n\n<li>Mesure : diam\u00e8tre du piston, conicit\u00e9, ovalisation ; hauteur de la gorge du segment, usure.<\/li>\n\n\n\n<li>Mesurer les segments de piston : jeu axial, jeu lat\u00e9ral, \u00e9lasticit\u00e9 ; les remplacer imm\u00e9diatement s'ils sont fissur\u00e9s\/\u00e9clat\u00e9s.<\/li>\n\n\n\n<li>Inspecter les axes de piston, les trous d'axe et les anneaux de retenue ; mesurer les jeux.<\/li>\n<\/ul>\n\n\n\n<p>3) <a href=\"http:\/\/cummins.com\" title=\"\">Chemise de cylindre<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nettoyer la paroi int\u00e9rieure ; meuler les bossages sup\u00e9rieurs (pour \u00e9viter le rainurage du cylindre).<\/li>\n\n\n\n<li>Mesurer le diam\u00e8tre int\u00e9rieur, la rondeur, la cylindricit\u00e9 ; v\u00e9rifier l'absence de rayures, de fissures et de cavitation.<\/li>\n\n\n\n<li>Rayures mineures, polissage de la pierre \u00e0 huile ; remplacement pour les d\u00e9fauts d\u00e9passant les normes<\/li>\n<\/ul>\n\n\n\n<p>4) Bielle et roulements<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Contr\u00f4ler l'absence de flexion ou de torsion de la bielle ; d\u00e9tection des d\u00e9fauts<\/li>\n\n\n\n<li>Roulements : \u00e9caillage de l'alliage, br\u00fblures, rayures ; mesure du jeu des roulements<\/li>\n\n\n\n<li>Boulons de bielle : fissures, \u00e9longation, filets ; doivent \u00eatre remplac\u00e9s (cycle \u00e9lev\u00e9)<\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>MAN L27\/38 Diesel Engine \u2014 Cylinder Head Removal MAN L27\/38 Diesel Engine \u2014 Piston and Connecting Rod Removal MAN L27\/38 Diesel Engine \u2014 Cylinder Liner Removal Cleaning and Inspection (Critical) 1) Cylinder Head 2) Piston and Rings 3) Cylinder Liner 4) Connecting rod and bearings<\/p>","protected":false},"author":1,"featured_media":2463,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,28],"tags":[],"class_list":["post-2462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-maintenance-guide","category-technical-support"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/posts\/2462","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/comments?post=2462"}],"version-history":[{"count":1,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/posts\/2462\/revisions"}],"predecessor-version":[{"id":2469,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/posts\/2462\/revisions\/2469"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/media\/2463"}],"wp:attachment":[{"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/media?parent=2462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/categories?post=2462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yzdlparts.com\/fr\/wp-json\/wp\/v2\/tags?post=2462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}