A leak down test will show you specifically. Joyfans automotive leak down tester kit includes everything you need for a basic fast & effective leak detection of small petrol engine on cars, trucks, motorcycles, atvs, snowmobiles, boats, etc. 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. A cylinder leak down test, can tell you if the loss of compression is from, worn rings, burned or stuck open valves or a leaking head gasket. Includes 14mm spark plug adapter.
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