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Madison - compression / leak down test help


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Disconnect the crank sensor, pull out a spark plug, stick compression tester in spark plug hole, crank engine, compare results to OEM range.  Do this across all cylinders.  *If you have a bad cylinder do a wet test.  Just add a few drops of oil to the piston before testing.

Cylinder leak down - acquire cylinder leak down tester>pull the spark plug>put engine at TDC>insert cylinder leak down tester>zero gauge>add air pressure>measure loss> should be less than 20% air loss.

That simple.

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