SKOOBY6 Posted January 21, 2009 Share Posted January 21, 2009 Could this be caused by perished piston rings?? Just a rumour i heard. Link to comment Share on other sites More sharing options...
Nick Jones Posted January 21, 2009 Share Posted January 21, 2009 Lots of possible causes for low compression.'Perished' doesn't seem like a good description for piston rings though - usually applied to rubber. I have heard it said that rings can loose their tension through severe overheating.Need more info about the problem. What pressures on what cylinders, test done with throttle open and engine warm? Any change if oil is added to the cylinders and test repeated?Some RV8s from Land/range rovers had low compression ratios and fairly low compression pressures anyway. Another favourite with them is eating the cam lobes so the valves don't open.Nick Link to comment Share on other sites More sharing options...
GreenV8Machine Posted January 22, 2009 Share Posted January 22, 2009 Could be burnt out valve seats or even a holy piston! loads of stuff. Link to comment Share on other sites More sharing options...
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