How To Perform A Cylinder Leak Down Test

Suggested AutoZone Products Cylinder Leak Down Tester Kit Buy Now Understanding Cylinder Leak Down TestThe cylinder leak down test is an advanced form of the compression test, providing more detailed and accurate information about the condition of an engine. A leak down test grants a deeper understanding by revealing where compression is being lost within an engine. This information is instrumental in accurately diagnosing cylinder head problems, which could go unnoticed in a standard compression test.While both compression and leak down tests rely on the fundamental principle of observing a pressure change in the cylinder, their execution and what they reveal differ significantly. A compression test measures the peak pressure within a cylinder at the point of ignition when the engine is turning only at a specific speed. On the other hand, a leak down test enables a mechanic to observe how much pressure is lost at a given amount of time, providing insights into leaks occurring at diffe...