Checking cylinder compression on diesel engines is basically the same procedure
as on gasoline engines except for the following:
- A special compression gauge adaptor suitable for diesel engines (because
these engines have much greater compression pressures) must be used.
- Remove the injector tubes and remove the injectors from each cylinder.
NOTE: Don't forget to remove the washer underneath each
injector; otherwise, it may get lost when the engine is cranked.
- When fitting the compression gauge adaptor to the cylinder head, make sure
the bleeder of the gauge (if equipped) is closed.
- When reinstalling the injector assemblies, install new washers underneath
each injector.
