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Re: Help - lost compression and can't see anything wron Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: Re: Help - lost compression and can't see anything wron, Makis, Sun, 12 Sep 2004 14:25:58 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Compression test only is a very crude way of testing an engine health.
Heat collapsed rings might not show up in a compression test and if it does it might only be a difference of about 10-20 Psi between cylinders which might make you feel that nothing is wrong.
Lets say that a perfect engine has 200 Psi all over the 4 cylinders and your engine when put together shows 180, 160, 160 180. That might not seem to alarming to you but it actually shows that the 2 center pistons have taken damage from the heat and the outer ones are down a little bit too.
It can manifest itself in rough running, difficult to pass smog and oil consumption.
Don't take my pressure suggestions as gospel since each comp tester have different readings. You have to use YOUR tester on a known good engine and compare it to YOUR readings of the repaired engine.
Anders
posted by 66.229.13...
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