Harbor freight buys their top quality tools from the same factories that supply our competitors We cut out the middleman and pass the savings to you! In this video i show how to use the leak down tester from harbor freight In order to perform the test the cylinder needs to be at top dead center on the com. This combustion leak detector quickly diagnoses combustion gas leaks brought on by head gaskets, cylinder heads and engine block leaks The tester fluid changes color when exposed to combustion gases trapped in the vehicle's coolant.
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