Learn how to use a cylinder leakdown test to diagnose compression loss and pinpoint the source of the leak But don't be alarmed if you get 15 to 18 percent leak down on. Learn how to use compressed air and a gauge set to evaluate the condition of your engine cylinders, pistons, rings, and valves without disassembling the engine
How To: Cylinder Leak Down Test - Owners World
See step by step instructions, tools needed, and how to interpret the results.
See the results, interpretations and tips for different leak paths and engine conditions.
The overall point is that a leak down tester is a great diagnostic tool to identify real (or imagined) cylinder pressure difficulties
