Cylinder Leak Down Tester,Compression Test kit -Engine Cylinder Dual Gauge Leakdown Tester kit Diagnostics Tool.

Product Information

Put the vehicle in gear and set the parking brake to prevent the engine from turning when air is compressed into the cylinder. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. This Wiki includes options for daily, rigorous professional use like the OTC 5609, as well as others for the odd job at home in your garage like the Faersi Cylinder Leak Detector. After the short block is assembled I install the head WITHOUT the cams, or the followers, or the pushrods, or without whatever operates the valves.

This means that a leak-down tester can be used to show when an engine is in need of a rebuild due to wear. A leak-down tester [2] is essentially a miniature flow meter similar in concept to an air flow bench. I make little grooves with a triangle jewelers file and paint 1/4 white and 2/3 a different color (red for me). Unintentional damage can be caused if performing a compression test incorrectly and should not be attempted without technical training. Insert the leak-down tester hose into the spark plug hole, then connect it to a compressed air source of at least 100 psi.There is less tendency to rotate when the piston is at top dead center, especially with small bore engines. Others may not be clamped on to the hose and allow air to escape during a test, thereby causing a false reading. Leak down testers are most accurate at low leakage levels, and the exact leakage reading is just a relative indication that can vary significantly between instruments.

The JEGS automotive leak down tester includes an adjustable air regulator, two pressure gauges, an air chuck, and a hose attachment. Besides leakage noise, indicated percentage of leakage will sometimes vary with regulator pressure and orifice size.

Testing is done on an engine which is not running, and normally with the tested cylinder at top dead center on compression, although testing can be done at other points in the compression and power stroke. The threads for each 14mm hose coupler are well machined and will accommodate additional adapters while still holding pressure. Includes air pressure gauge, pump-up bulb and fittings and adapters for most single and twin cylinder 2-stroke motorcycle engines. If you're trying to decide whether or not to condemn an engine, the last thing you want to settle on is the quality of your leak down tester.

The measuring element is the restriction orifice and the leakage in the engine is compared to the flow of this orifice. Further complicating things, nonstandard restriction orifice sizes will cause different indicated leakage percentages with the same cylinder leakage.Depending on your budget and how much power you are willing to give up, you will probably want to rebuild the engine when leak-down reaches somewhere around 10% to 15%.