Mechanics

COMPRESSION BUILDUP IN SUMP

1992 Toyota Corolla • 350,000 miles

I have a 1992 Toyota Corolla 1.6 with a 4AF engine. On a trip last week it lost power and built up compression in the sump, and missing on no 2 piston. We have checked to make sure all 4 plugs are firing, and replaced cylinder head gasket. Have also check to make sure all the valves are ok. Can anyone perhaps give us any suggestions as to what can be wrong.
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Caroldutoit
October 13, 2012.



It sounds like the rings have failed on a cylinder allowing compression into the crankcase.

Roy

ASEMaster6371
Oct 13, 2012.
A compression test might show you something.

KHLow2008
Oct 13, 2012.