What is a leak down test A leak down test is a method of using compressed air and a specialized gauge set that reads differential pressure to evaluate the condition of an engine’s cylinders, pistons and rings, and valves and seats without disassembling the engine. Disconnect the gauge and move to the next cylinder Before you tear down the engine, pinpoint where problems are by using these three steps to do an engine leakdown test. How to perform a cylinder leakdown test mastering cylinder leakdown testing Pinpointing compression loss like a pro if you’ve ever run a compression test and found one or more cylinders reading lower than the rest, you know there’s a problem
But a compression test can’t tell you why the cylinder is losing pressure That’s why i always follow up with a cylinder leakdown test to. 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.
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