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Engine compression check

Engine compression check


1. Remove the upper engine cover and charge air pipe.


2. Disconnect the glow plugs.


3. Undo and remove the glow plugs.

4. Remove the fuel pump fuse from the main fuse board.


5. Connect a compression gauge with a measuring range of between 10 and 40 bar to the glow plug hole together with Adapter, compression test diesel 83 95 345.

6. Run the starter motor for at least 4 seconds at a speed of at least 150 rpm. Continue until the gauge stops. The maximum permitted cylinder differential 10%.

7. Disconnect the compression gauge and adapter.


8. Replace the fuel pump fuse in the main fuse board.

9. Fit the glow plugs.

Tightening torque 10 Nm (8 lbf ft).


10. Connect the glow plugs.

11. Refit the charge air pipe and the engine cover.


12. Clear any diagnostic trouble codes.