BUICK, CADILLAC, CHEVROLET, GMC

PIP4959G

2017-12-11 · NHTSA 10126958

목록의 차량은 조사 단서입니다. 제조사 자료에서 엔진, 생산 기간, 소프트웨어 조건을 확인하세요.

제조사 요약

영어 원문

This Preliminary Information communication provides information to the technician with information regarding high misfire rates always on #1 cylinder. A customer may complain of misfires or roughness on cold start up with a P0300 diagnostic trouble code. Technician is to add coolant dye to the system and run the engine through warm up to circulate the dye. Pressurize the cooling system after a cold soak and inspect the cylinder with a bore scope for coolant dye. Dye is used to identify coolant over residual fuel being that might be left in the cylinder. The technician is not to replace the cylinder head as it will not correct this concern. In some cases it is necessary to remove the head for inspection. Do not replace the engine for small surface pock marks or a pitting appearance this is normal and do not connect to coolant passages. Usually if porosity is present there will be a break in the carbon ring. Only replace the engine if true porosity is found. Technician is to call Product Quality Center with the latest version of bulletin 02-07-30-029 if porosity is found and engine replacement is required.

제조사, 번호, 발행일, 전체 요약이 같은 등록만 묶고 원래 번호를 보존합니다. 과거 자료도 유지하며 확인된 명시적 후속판만 표시합니다. 1994년 이전 관계는 기본 결과와 분리합니다. 연식 미기재는 모든 연식 적용이 아닙니다.