{"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-guida-alla-manutenzione","status":"publish","type":"post","link":"https:\/\/yzdlparts.com\/it\/maintenance-guide\/man-l27-38-maintenance-guide\/","title":{"rendered":"Motore diesel MAN L27\/38: Guida completa alla manutenzione e all'assistenza"},"content":{"rendered":"<h2 class=\"wp-block-heading\">MAN L27\/38 <a href=\"https:\/\/yzdlparts.com\/it\/motori-diesel-cummins\/\" title=\"\">Motore diesel<\/a> - Rimozione della testa del cilindro<\/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=\"Testata cilindri MAN L27\/38\" 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=\"Testata cilindri MAN L27\/38\" 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>Rimozione: Tubi del carburante ad alta pressione, tubi dell'aria di avviamento, tubi dell'acqua di raffreddamento, tubi di scarico, sensori e valvole di controllo.<br>\u200b<\/li>\n\n\n\n<li>Rimuovere i coperchi di protezione dei bulloni della testa del cilindro; installare i tenditori idraulici; allentare i dadi seguendo uno schema simmetrico e trasversale.<br>\u200b<\/li>\n\n\n\n<li>Specifiche tipiche dei motori diesel MAN 27\/38: Pressione dell'olio di 1200 bar.<br>\u200b<\/li>\n\n\n\n<li>Utilizzando un attrezzo di sollevamento specializzato, sollevare con cautela la testa del cilindro; rimuovere la guarnizione della testa del cilindro verticalmente (sostituirla con una nuova).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">MAN L27\/38 <a href=\"https:\/\/yzdlparts.com\/it\/ricambi-per-il-motore-cummins-x15\/\" title=\"\">Motore diesel<\/a> - Rimozione del pistone e della biella<\/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 Camicia del cilindro\" 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=\"Biela MAN L27\/38\" 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=\"Biela MAN L27\/38\" 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>Portare il motore in prossimit\u00e0 del punto morto superiore (TDC) e pulire il foro di sollevamento sulla corona del pistone.<\/li>\n\n\n\n<li>Aprire gli sportelli di ispezione del basamento; rimuovere il coperchio del cuscinetto di biella e i gusci dei cuscinetti e applicare i segni di riscontro.<\/li>\n\n\n\n<li>Collegare l'attrezzo specializzato per il sollevamento del pistone e sollevare lentamente e verticalmente il gruppo pistone-stelo di collegamento.<\/li>\n\n\n\n<li>Collocare il gruppo su un supporto specializzato per proteggere il pistone, le fasce elastiche, i gusci dei cuscinetti e la biella.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Motore diesel MAN L27\/38 - <a href=\"https:\/\/yzdlparts.com\/it\/ricambi-per-il-motore-cummins-x15\/\" title=\"Rivestimento del cilindro\">Rivestimento del cilindro<\/a> Rimozione<\/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 Camicia del cilindro\" 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>Rimuovere i tubi di ingresso e di uscita dell'acqua di raffreddamento della camicia del cilindro; eseguire la misurazione della temperatura e la lubrificazione.<br>\u200b<\/li>\n\n\n\n<li>Con l'ausilio di strumenti specializzati, sollevare agevolmente la camicia del cilindro; ispezionare la camicia d'acqua, gli anelli di tenuta e verificare la presenza di corrosione.<br>\u200b<\/li>\n\n\n\n<li>Pulire l'alesaggio del blocco cilindri; sostituire gli anelli di tenuta.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Pulizia e ispezione (critica)<\/h2>\n\n\n\n<p>1) Testa del cilindro<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pulire i depositi carboniosi; ispezionare i fori delle valvole e la camera dell'acqua di raffreddamento per verificare la presenza di crepe\/corrosione.<\/li>\n\n\n\n<li>Smontare e ispezionare le valvole di aspirazione\/scarico, le sedi delle valvole, effettuare una prova di pressione (5 kg), misurare i tubi guida, le molle e le maniglie delle valvole.<\/li>\n\n\n\n<li>Rettificare le superfici di tenuta; eseguire un test di tenuta; planarit\u00e0 \u2264 0,05 mm.<\/li>\n<\/ul>\n\n\n\n<p>2) Pistone e anelli<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pulire la parte superiore, le scanalature degli anelli e i depositi carboniosi della camera di raffreddamento (non usare spazzole metalliche).<\/li>\n\n\n\n<li>Misurare: diametro del pistone, conicit\u00e0, ovalizzazione; altezza della scanalatura dell'anello, usura.<\/li>\n\n\n\n<li>Misurare le fasce elastiche: gioco di estremit\u00e0, gioco laterale, elasticit\u00e0; sostituirle immediatamente se sono incrinate o scheggiate.<\/li>\n\n\n\n<li>Ispezionare gli spinotti dei pistoni, i fori degli spinotti e gli anelli di ritegno; misurare i giochi.<\/li>\n<\/ul>\n\n\n\n<p>3) <a href=\"http:\/\/cummins.com\" title=\"\">Rivestimento del cilindro<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pulire la parete interna; smerigliare le bussole superiori (per evitare l'incisione del cilindro).<\/li>\n\n\n\n<li>Misurare il diametro interno, la rotondit\u00e0 e la cilindricit\u00e0; verificare la presenza di incisioni, crepe e cavitazione.<\/li>\n\n\n\n<li>Graffi minori, lucidatura a olio; sostituzione per difetti superiori agli standard<\/li>\n<\/ul>\n\n\n\n<p>4) Biella e cuscinetti<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Controllo della biella per verificare la flessione\/torsione; rilevamento dei difetti<\/li>\n\n\n\n<li>Cuscinetti: scaglie di lega, bruciature, graffi; misurare il gioco dei cuscinetti<\/li>\n\n\n\n<li>Bulloni della biella: cricche, allungamenti, filettature; devono essere sostituiti (ciclo elevato)<\/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":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Expert guide to MAN L27\/38 diesel engine maintenance. 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Scopri passo dopo passo come eseguire la manutenzione della testata, le ispezioni periodiche e i consigli per ottenere prestazioni ottimali dal motore","canonical_url":"https:\/\/yzdlparts.com\/it\/maintenance-guide\/man-l27-38-maintenance-guide\/","robots":"max-snippet:-1, max-image-preview:large, max-video-preview:-1","keywords":"","webmasterTools":{"google-site-verification":"3KsgiAUkNAbGxoKMCHSYOuovAZmr1EUidaOVBcyUWa4","miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"Yizhi Power -","og:type":"article","og:title":"MAN L27\/38 Maintenance Guide: Cylinder Head &amp; Service Tips","og:description":"Expert guide to MAN L27\/38 diesel engine maintenance. 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