Like a compression test, a leak down test is accomplished by replacing a spark plug with the tester hose. What is a leak down test Cylinder pressure leak down tester in a cylinder leak down test the engine is placed on top dead centre (tdc), of the cylinder in question
Amazon.com: Cylinder Leak Down Tester,Compression Test kit - Engine Cylinder Dual Gauge Leakdown
Then, using a similar type of connector as the compression test, we fill the cylinder with pressure
The tester then measures the volume of air needed to maintain, a predetermined pressure in the cylinder.
The beauty of the leak down test is, you can test only low cylinders, or you can test all the cylinders to determine overall engine condition.
