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Old 06-29-2006, 06:04 AM
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302 Z28 302 Z28 is offline
 
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The generally agreed upon standard is 10%. You can run another test cold by squirting a small quantity of oil in the cylinder, turn the engine over a few times and recheck the compression. If there is 10% differance then the rings are worn.

You say the engine was rebuilt. Was it bored and new pistons installed, or just a ring job?

Vince
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