I have about 70 hours on a 2018 XC 300 and just bought a compression tester. I never tested the compression when it was new. I also have an RK Tek head on it and never tested the compression when I put that on. I know it will be hard to tell since I won?t have anything to reference today?s compression test to but is there a good ballpark number I should be around?
Compression test
- Thread starter GG221
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