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Compression test results for 1948 254CI 8

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(@palm5000msn-com)
Posts: 37
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Does anyone know what the ideal results would be on a compression test on a 1948 Hudson eight cylinder motor? performed a compression test and got results ranging from 30 to 84...im assuming this most likely means I am in dire need of either a valve adjustment or a full blown valve job?


 
Posted : 20/07/2013 10:31 am
(@radio-dave)
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Have you tried a squirt of oil down each spark plug hole & then a remeasure? Will help distinguish between rings & valves!!


 
Posted : 20/07/2013 12:52 pm
(@palm5000msn-com)
Posts: 37
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I retook the test with a guage that didn't leak and the results were as follows from front of the motor (radiator), to the back. 71, 76, 75, 82, 90, 85, 90, 57...


 
Posted : 21/07/2013 6:16 am
(@radio-dave)
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I'd still do the squirt of oil thing. If the compressions increase after this then the rings are leaking, if not it's valves.


 
Posted : 21/07/2013 2:47 pm

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