Checking the cylinder compression on diesel engines is basically the same procedures as on gasoline engines, except for the following:
- A special compression gauge adapter suitable for diesel engines (because these engines have much greater compression pressures) must be used.
- Remove the injector tubes and the injectors from each cylinder.
- When fitting the compression gauge adapter to the cylinder head, make sure the bleeder of the gauge (if equipped) is closed.
- When reinstalling the injector assemblies, install new washers beneath each injector.