Leak down is the percentage of compression that is lost by the engine, and every engine has some Like a compression test, a leak down test is accomplished by replacing a spark plug with the tester hose. A cylinder leak down test, can tell you if the loss of compression is from, worn rings, burned or stuck open valves or a leaking head gasket. Compression testing is another good tool to use when diagnosing an engine Combining the results of a leak down test with a cranking compression test can indicate an engine's potential. This dual gauge is ideal to check leak down and set barrel valves on fuel injection systems without running the engine
Detects ring seat failure, bent valves, cracked heads, and leaking gaskets Works best with 100+ psi air source
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