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Interpreting Results Of Compression Test

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Old 03-31-2014, 08:01 PM
Hondahonda's Avatar
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Default Interpreting Results Of Compression Test

Ok, so I finally got around to doing that compression test, now that my cars all good and squared away thanks to you wonderful people of the Honda forums.

I did the test with the engine at operating temperature and I got some weird results. All the dry/wet readings are just about the same. I think what happened was the oil in my spark plug wells probably fell on top of the cylinders when I removed the spark plugs. Dang nab it.

For cylinder #1 to 4, I have "dry": 120 psi, 135psi, 128 psi, and 130. Wet is pretty much inconclusive.

So, since I don't really want to wait and redo it tomorrow, how do my numbers look? Assuming these are the "wet" numbers. As far as I see, they all look about uniform. Can anyone tell me what the service manual says is good PSI for dry & wet compression test?
 
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