Jumped timing chain (no compression on 3 cylinders) - GM 3.6

Anyone looking for information on checking engine timing with a scope, look no further! I have the opportunity to show several different methods of testing on this Buick with a chain problem, and how you can be confident in your call. We also get to see another variable with the relative compression test, which can bite you if you’re not careful. Engine Performance Diagnostics chapter 1 Symptoms - crank no start - spark and fuel present - no excessive exhaust backpressure Fix - corrected th

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