This test, indispensable for measuring the capability of an engine to hold pressure, is an integral part of any thorough engine health assessment due to its ability to pinpoint issues that rob you of power and reliability. This is the writer’s ancient (and now discontinued) manley dual gauge leakdown. Should allow you to quickly determine, the basic condition of any engine
Leak Down Testing — How It Works And What It Tells You
So, a compression test is a “dynamic test” (engine moving).
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. What a leak down tester does, is compare the line pressure of an air source to the flowing pressure when the cylinder is pressurized The air source is connected to the tester and then the tester attached to the spark plug hole of the cylinder you are testing The pressure differential is displayed as a percentage, between 0 and 100
If your tester were to have dual gauges in psi instead, you. Some leakdown tester basics as you can see, a leakdown tester can prove to be an extremely versatile tool There are a ton of different leakdown testers on the market, so we’ll highlight some below and give you the basics of a dual gauge system too
