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Old 05-28-2008, 05:25 PM   #1
Jcentsr6
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402 engine compression???

Does anyone know what the engine compression test results should show for a 396/402 motor??? I need the proper range it needs to be in?? PLEASE
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Old 05-28-2008, 07:21 PM   #2
sameyrasmea72
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Re: 402 engine compression???

what year is the engine? There is alot of difference between a 68 and a 72.
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Old 05-28-2008, 07:30 PM   #3
Jcentsr6
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Re: 402 engine compression???

1970 402 big block. I needs compression specs taken from the spark plug hole....not ratio compression..thanks
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Old 05-28-2008, 07:45 PM   #4
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Re: 402 engine compression???

Lowest cylinder should be within 15% of the highist. Spark plug compression depends on what kind of cam you have and the wear on the engine.
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