A leak down test works by pressurizing the crankcase cavity and cylinder. A small air pump is used to pressurize the cavity to 5psi and the pressure is monitored in the cavity for around five minutes.
Motion Pro 08 0071 2 Stroke Leak Down Tester
Motorcycle leak down test. Remove schrader valve from compression tester hose and insert into plug hole. This kit is supplied with a cylinder leakage tester three adapter hoses 10mm 12mm 14mm and carrying case. The way a leak down test works is fairly simple. Make sure this fits by entering your model number. Regulate leak down. How to perform a motorcycle leak down test.
Aircraft mechanics have used this test for a long time. Put motorcycle in high gear and have a helper apply rear brake. With the piston just shy of tdc and the valves closed compression stroke air pressurizes the cylinder to a defined pressure which is recorded by a pressure gauge. Remove schrader valve from compression tester hose and insert into plug hole. The drill is this. Designed to check the amount of cylinder leakage in a 4 stroke engine with an air source of 70 to150 psi this system will pressurize the cylinder with 60 psi of air gauge will register the.
How to perform a motorcycle leak down test bring engine to top dead center tdc. The less air leakage the better. A moisture free air supply of 70 psi to 200 psi is required. Hook up leak down tester to 40psi shop air supply. Leak down testing is simply measuring the rate of air leakage past the rings and valves of an engine. A second pressure gauge is used to monitor the amount of air escaping the combustion chamber.
A leak down test involves pressurizing the cylinders while the engine is a top dead center tdc. A plug is inserted into the intake manifold and another plug or block off plate is used on the exhaust to create an airtight cavity. Leak down tests can also be used for motorcycles that feature decompression mechanisms 2 strokes. Refer to your service manualfor this procedure. The motion pro leak down tester is designed to check the percentage of cylinder leakage in a 4 stroke engine. Bring engine to top dead center tdc.
Set the engine at top dead center and attach the leak down tester hose to the sparkplug hole. In this position all the valves will be closed and the only places where pressure can escape is through. Lock the crankshaft in place. Refer to your service manual for this procedure. Pit posse pp2723 leak down tester motorcycle tool.
Gallery of Motorcycle Leak Down Test
