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What I always look for,,,
Posted by KeithR (more from KeithR) on Mon, 26 Aug 2002 22:27:06
In Reply to: Re: compression test numbers, zeke, Mon, 26 Aug 2002 15:29:00
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Uniformity between the cylinders is the most important. There are to many variables to list a certain number, humidity, temperature, battery condition, engine temp, and oil viscosity will all make a big difference. A dirty air filter can even bring the numbers down, and holding the throttle open will raise the numbers. The best check is a leakdown test, which puts a measured amount of air into the cylinder and measures the percent retained. Requires a leakdown tester(about $100) and an air compressor. allows you to make a baseline for your engine and monitor for changes. You can actually hear were the leakage is going (intake, exhaust, rings, head gasket) One other addition is to do a wet compression check, you squirt some oil into the cylinder, and take a reading, a cylinder that goes from low (dry) to high (wet) has signs of worn rings, no change at all is valve leakage. The numbers you posted, on a general basis, show one darn healthy engine, keep up whatever you are doing.
posted by 162.39.19...
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