{"id":12781,"date":"2021-05-12T12:00:03","date_gmt":"2021-05-12T11:00:03","guid":{"rendered":"https:\/\/bartechmarine.com\/?p=12781"},"modified":"2021-05-12T09:48:07","modified_gmt":"2021-05-12T08:48:07","slug":"incorrect-overhaul","status":"publish","type":"post","link":"https:\/\/bartechmarine.com\/blog\/incorrect-overhaul\/","title":{"rendered":"Incorrect Overhaul"},"content":{"rendered":"<p><h3>We recently received a Caterpillar 3412 from an offshore operator after they had a surprising discovery when removing a cylinder head.<\/h3>\n<\/p>\n<p>The engine had been overhauled by another provider, and then run for a grand total of 11 hours.<\/p>\n<p>But when the crew removed the cylinder heads to sort a problem on another 3412 engine, serious concerns were raised.<\/p>\n<p>And once it arrived in our workshop, it was obvious to see why, with some big question marks over the standards of the previous overhaul, highlighted by the following:<\/p>\n<ul class=\"flagbullet\">\n<li>Liner scoring, showing the liners should have been replaced, or there&rsquo;s a more significant underlying issue that&rsquo;s caused these issues after only 11 hours<\/li>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/bartechmarine.com\/wp-content\/uploads\/Scoring-on-two-cylinders.jpg\" alt=\"Scoring on two cylinders\" width=\"629\" height=\"227\" class=\"aligncenter size-full wp-image-12782\" \/><\/p>\n<\/p>\n<li>A piston which had fuel sat on top and no real carbon build-up, indicating the injector was not operating correctly<\/li>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/bartechmarine.com\/wp-content\/uploads\/Piston-looking-damp-and-much-cleaner-than-the-rest..jpg\" alt=\"Piston looking damp and much cleaner than the rest.\" width=\"625\" height=\"227\" class=\"aligncenter size-full wp-image-12783\" \/><\/p>\n<li>The turbocharger air outlet hoses have delaminated and required replacement<\/li>\n<li>A score mark was discovered on the flame face between combustion chambers<\/li>\n<li>Some of the valve springs, valves and collets were then selected at random across the two heads for removal and inspection. Those removed were found to be in a poor unserviceable condition, and likely mirror the condition of the others<\/li>\n<li>Debris was found lying in the sump &#8211; this raises concerns of potential damage to other parts of the engine<\/li>\n<\/ul>\n<p>We could continue with further issues about the big end bearings, lack of antifreeze or inhibitor, bent fins and cracked rocker gear, but I think you get the picture!<\/p>\n<p>During any overhaul, there will be a list of parts that should be replaced or inspected and a full report with measurement and inspection sheets to confirm best practice has been carried out.<\/p>\n<p style=\"text-align: center;\"><strong>For information on the steps, our engineers take during overhauls, <a href=\"https:\/\/bartechmarine.com\/services\/overhauls\/\" rel=\"noopener noreferrer\" target=\"_blank\">click here.<\/a><\/strong><\/p>\n<p><h4>Please feel free to <a href=\"https:\/\/bartechmarine.com\/contact-bartech\/\" rel=\"noopener noreferrer\" target=\"_blank\">get in touch<\/a> for some impartial, specialist advice if you have any concerns about previous work or questions about upcoming scopes.<\/h4><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We recently received a Caterpillar 3412 from an offshore operator after they had a surprising<\/p>\n","protected":false},"author":22,"featured_media":12790,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[58,112,91,115],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Diesel Engine | Overhaul | Guidance | What is Included | Quality 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