Checking Cylinder For Leakage
- The engine should be run to operating temperature so that the thermostat is open
- The piston in the cylinder that is being checked must be set to top dead center (TDC) at the compression phase
- A metered air pressure is connected to the relevant cylinder via an adapter that is secured in the spark plug / glow plug well
- A gauge is used to measure the size of the leakage from the cylinder.
This is a pressure sensor with a regulator and displays the size of the leak expressed as a percentage.
This allows the extent of any problem to be determined.