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Old 05-05-2013, 03:05 PM
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briansansone briansansone is offline
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restoring low compression??to pass emissions

A buddy of mine has 97 honda civic. Here in Atlanta he can't get his tag b/c the check engine light is on. The computer reads random misfire.
I ran a compression test and found two cylinders(2 and 3 ) built compression a bit slowly, and only built up to 110 psi. About 40 psi short for that 4 cylinder engine. The other two cylinders were fine.
I then squirted some oil into the cylinder to check if the rings were leaking.
The compression was the same, leading me to determine the problem is in the head. Bad valves or seats, bad cam, leaking head gasket

The car actually runs ok, but will not pass an emissions test.

My question is this.
Can I restore compression without pulling the head off and repairing it?
I think it will pass emissions if I can get the compression up to within 10% of the other two cylinders.

Thanks hotrodders!
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