Isuzu Cars and Trucks 1981-1991

Diesel Engines

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Checking the cylinder compression on diesel engines is basically the same procedures as on gasoline engines, except for the following:

  1. A special compression gauge adapter suitable for diesel engines (because these engines have much greater compression pressures) must be used.
  2.  
  3. Remove the injector tubes and the injectors from each cylinder.
  4.  


NOTE
Don't forget to remove the washer beneath each injector; otherwise, it may get lost when the engine is cranked.

  1. When fitting the compression gauge adapter to the cylinder head, make sure the bleeder of the gauge (if equipped) is closed.
  2.  
  3. When reinstalling the injector assemblies, install new washers beneath each injector.
  4.  

 
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