Compression test results (good or bad?)

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08-28-2006, 01:22 AM

01CivicEX

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Compression test results (good or bad?)

So here's the results:

1. 159 PSI
2. 154 PSI
3. 151 PSI
4. 156 PSI

Service manual says should be 135 PSI.

My car has 103,000 miles it.

Why is the compression higher than the book says?

08-28-2006, 02:35 AM

baker

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Location: Birmingham, AL

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RE: Compression test results (good or bad?)

that's not a bad thing.

08-28-2006, 08:24 AM

Forty04

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Join Date: Mar 2005

Posts: 15,280

RE: Compression test results (good or bad?)

The numbers aren't bad, but they're not phenominal. The rule of thumb is that as long as their not 10+psi different from each other, you are ok.

08-29-2006, 04:27 PM

finalimpact

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Location: NC

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RE: Compression test results (good or bad?)

Quote:

ORIGINAL: 01CivicEX

Service manual says should be 135 PSI.

altitude plays a big role on your readings..............as well as carbon deposits.

08-30-2006, 11:05 AM

AgentofDarkness

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Location: Chicago, Illinois

Posts: 5,180

RE: Compression test results (good or bad?)

Try running some seafoam through the engine or something else that will reduce the carbon deposits. As long as the readings are within 10% of each other you don't have any major problems.