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how do i check motor compression if motor if out of the car?

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Old 10-22-2007, 06:57 PM
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Default how do i check motor compression if motor if out of the car?

Hey if im looking to buy a motor and want to test the motor out for compression to make sure it isnt beat to **** with low compression. How do i do this?
Old 10-22-2007, 07:01 PM
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jump the starter directly with a battery, then use a compression checker as usual

i don't know what electronics in the starter this will destroy, but it'll tell you how good compression is
Old 10-22-2007, 07:11 PM
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Still not very accurate readings cause the engine isn't warm. The only thing you can check with the motor removed is consistent compression.
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