1991 Geo Tracker Zero Compression in one cylinder

1991 GEO TRACKER
135,000 MILES • 4 CYL • 2WD • MANUAL
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GLOVERGS
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#2 cylinder has zero compression, while other three have 80 PSI compression. Vehicle dies when ever you come to a stop and runs rough (running on three cylinders).

Does this mean piston rings are bad, or possible hole in piston? I tried pouring little amount of oil in bad cylinder and rechecking compression...still zero pressure.

Does this mean enigne needs rebuild...if so can I replace just that piston or all?

Thanks for the help, Gary
Sep 16, 2008 at 2:46 AM
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MHPAUTOS
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Hi there,

If it had a hole in a piston it would be burning clouds of smoke, i would say you have a burnt or stuck valve, check this out first.

mark (mhpautos)
Sep 16, 2008 at 4:57 AM
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