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KULTULZ · 07-12-2021, 03:44 AM

READ THIS - https://dannysengineportal.com/compr...n-it-tell-you/

You need a screw-in tester as the hand-held version is for a lawnmower.

With the engine cold, you are only going to get a brief idea of cylinder condition. Did you spray the piston rings with any type of solvent and let sit for a few days to try and free them up before testing? A TRUE ZERO indicates a leaking valve or hole in the piston (or possible head gasket).

After the first test, you would squirt a very small amount into each cylinder to seal the rings and if the pressure goes go, it is most likely the valve(s).

07-12-2021, 03:44 AM	#3
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,485	Re: first compression test READ THIS - https://dannysengineportal.com/compr...n-it-tell-you/ You need a screw-in tester as the hand-held version is for a lawnmower. With the engine cold, you are only going to get a brief idea of cylinder condition. Did you spray the piston rings with any type of solvent and let sit for a few days to try and free them up before testing? A TRUE ZERO indicates a leaking valve or hole in the piston (or possible head gasket). After the first test, you would squirt a very small amount into each cylinder to seal the rings and if the pressure goes go, it is most likely the valve(s). __________________ ***** We should have a contest. The player has to start at the very last post of a thread & then try to guess what the OP's original question was about ...