1Accurate Testing: Combustion leak test kit can test the CO2 content in the combustion systems of gasoline, diesel and natural gas engines. The test liquid after the test can be recycled and reused. 2Multi Purpose: The tester aims to detect damage to the cylinder heads and gaskets of combustion and liquid cooled engines (gasoline, diesel, liquefied petroleum gas). 3Efficient Working: The tester can be directly connected to the cooler to conveniently and quickly test for leaks and defects in the cylinder head gasket, such as fine line cracks. 4Simple to Operate: The tester has a conical plug that can fit all common radiators and reservoirs, making it very convenient to use. Accurate design, high performance, stable and reliable. 5Wide Application: Combustion gas leak testers kit can be widely used, suitable for cars, trucks, road tractors, excavators, motorcycles and forklifts.