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Question: still low compression on 2 cylinders
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imwfo, 1.8L 4 Cylinder, Gretna, LA, November 22, 2010, 09:23
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1zz motor that was run very hot. Had water on middle 2 plugs with very low compression. Had cylinder head surfaced and replaced head gasket. Now the compression is as follows, 125-65-45-145. No more water in cylinders, but obviously running terrible. Is there something i am missing? Any ideas? Valves were ok, common issues with rings or???
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Answer #1
Superbob November 22, 2010, 15:05Reply
MasterOverheating an engine can cause the piston rings and the pistons to collapse causing low compression and/or piston slap noise. You could get a cylinder leak-down test done to determine where the compression is leaking.
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