Connectors and adapters are made of brass.Compression gauge has a side-release valve.Has a quick connect to fit the hose assembly.Features a purge valve at the base of the gauge.Includes a removable tray to keep the tool and accessories together.Attaches to 10mm, 12mm, 14mm, 16mm, and 18mm spark plug holes.Packages in a durable plastic molded case.Package contains 4 different adapter sizes.In this article, we review the 5 best compression tester kits for gasoline engines. Some kits include additional accessories such as threaded adapters of different sizes, direct shafts, and repair kits. Basically, a compression tester tool consists of a compression gauge and a spark plug hose assembly. There are many causes of low compression in a motor that can be diagnosed quite easily using a good compression tester kit. This is what most people refer to as loss of power. If the compression in the cylinders is not good enough, the engine or motor will not produce enough power. This back-and-forth movement of the piston due to compression and expansion in the engine cylinder produces the motor power. As a result, the piston causes the crankshaft to rotate. The heat energy in the hot exhaust gases pushes the piston up rapidly. This causes the fuel/air mixture to burn to release very hot combustion gases. As you might already know, an internal combustion engine works on the principle of compression and expansion of gases.įuel/air mixture is compressed inside the cylinder and an electric spark from spark plugs is introduced. What is an engine compression tester?Īn engine compression tester kit is a toolset used to test the compression in the cylinders of an internal combustion engine. It helps to find out if there is enough pressure build-up in the engine cylinders. This test is performed using an engine compression tester kit. When troubleshooting the ignition system of a car, one important test that should be at the top of the list is the engine compression test. The intensive diagnosis often narrows down to two things: 1) testing the ignition system, and 2) testing the fuel system. When you see symptoms such as engine misfire, loss of power, rough idle, or white smoke coming from the tailpipe of your car, you know it is time for serious engine diagnosis.
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