LI01.30-P-050379_Ver_3 PDF

A service bulletin that addresses the issue of misfire, rough running, and Check Engine Light (CEL) activation in vehicles with 272 and 273 engines. The document details customer complaints, attributing the cause to unfavorable wear of exhaust valve seats in cylinder heads. It provides a remedy procedure for replacing affected cylinder heads and includes specific engine number ranges for those requiring attention. Additionally, it contains images showcasing the wear patterns on exhaust valve seats.