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Old 12-08-2014, 11:53 PM   #1
Gmcfolife
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Compression Test

Does anyone know what the compression should be on a 8.1L motor?
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Old 12-12-2014, 07:53 AM   #2
4x4toy
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Re: Compression Test

Healthy engines should have compression over 100 psi per cylinder, with no more than 10 percent variation between the highest and lowest readings.
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