Question about 1992 Saturn SL1

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My compression on cyinder 1 and 4 are at 152 but 2 and 3 are at 190 psi

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It is a bit odd to get the same low compression in 2 cylinders so far apart. Are you sure you are measuring the compression at those 1 and 4 cylinders properly. Confirm you are following the right procedure for measuring the compression. If you have got the right readings then you likely have a head problem because rings tend not to go bad like that at the same time. Could be a warped head or valve issues. You might be noticing pressure related issues in the crankcase or poor running due to the pressure bypassing the exhaust.

Posted on Nov 19, 2013

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