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Compression test

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Old 03-26-2013, 12:05 AM
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Default Compression test

Soo i tested my 97 grand cherokee with 258k on it.
All cylinders were 115-125 soo this a good compression?
Old 03-26-2013, 08:04 AM
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The important thing is consistency. What was your high and low?
With all plugs removed and throttle blocked open and with a GOOD battery you should see 120-150 pounds.
With your high mileage your readings seem to be normal. Why are you asking? What symptoms are you having?
Old 03-26-2013, 08:12 AM
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With 258k on the clock, I would say you're doing pretty good. As long as the oil pressure is still good and the engine runs good, you have another 100k in the engine.
Old 03-26-2013, 08:42 AM
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Originally Posted by Bustedback
With 258k on the clock, I would say you're doing pretty good. As long as the oil pressure is still good and the engine runs good, you have another 100k in the engine.
+++1
Bustedback, I like your signature about oil pressure....dead on!
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