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Posted

Get an autopart store or walmart cheap tester for about $15 to $20. Remove spark plug and screw the tester fitting into the head. Kick it over with the ignition off several times untill the needle on the tester quits climbing. Read the guage. Rlease the pressure in guage and repeat. Do this a couple times per cylinder to check results are consistant. Put plug back in and do it on the other side.

Posted (edited)
I was always told you need to hold the throttle wide open as well during the cranking / kicking...

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Correct. Leave your key off, screw in your tester like Ducman said, hold it at WOT & kick it over until the needle on the gauge stops climing. Then release the pressure & do it again, let it set about a minute & see if the compression holds. B)

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On my old shee that I got rid of...milled head .030 & 150lbs compression. :cheers:

Edited by ledofthezep
Posted

I've been told by a few people that is more accuratre when tested with the engine at or near its operating temp. Personally I havent tried it yet, but I'd lik eot see if the results differ.

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