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Chevrolet Repair/low compression
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Question
i have a 1989 gmc sierra with a5.7 350 tpi i lost compression in 2 cylinders and clues as to why . and is there anyway to fix this with out a rebuild thanks
Hi Joe... depends on if it is a valve or ring problem... do a wet compression test... put a little oil in the cyls.and see if commpression increases if it does chances are it is ring problem in which case you will need a tear down...if no increase could be a valve problem.... hope this helps
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Robert Summers
Expertise
domestic auto/truck repair, auto body, painting. I currently own a large auto/truck/marine repair shop. 40 years certified 310S,310T,310B in ontario Canada
Experience
40 years certified 310S,310T,310B ontario qualified, 7 years with GM have owned my own shop now for the past 27 years.was automotive marketing director for large auto parts supplier.
Organizations
CFIB (current) past member AARO and APAA.
Education/Credentials
grade 12 plus 2 years college. many aftermarket training courses
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