Checking and adjusting the moment of start of injection of the high-pressure fuel pump (Opel Kadett D)

It can be checked with the engine installed and removed. To check, you need a dial-type micrometer with an adapter for screwing.



Remove the clutch cover.

Turn the crankshaft until the TDC mark is located at a distance of approximately 5 cm from the pointer.

Unscrew the central screw of the injection pump cover, See the figure below.

Do not remove the cold start accelerator rod.

The timing belt tension must be normal.



Screw in a micrometer with an OPEL KM-226 adapter and a copper sealing ring instead of the central screw. Do not tighten too much. Set the micrometer to 0.



Rotate the crankshaft further until the marking on the flywheel aligns with the pointer. The micrometer should show 1.0±0.05 mm of piston stroke.





If the value is not reached, adjust. To do this, remove the toothed belt guard.



Unscrew the three screws on the pump drive wheel.



Adjust the pump stroke. To do this, slightly turn the wheel hub with the KM-541 tool or with a spanner wrench on the central screw.

Tighten the screws slightly.

Check the adjustment again by turning the crankshaft back 90°.



After adjustment, tighten the wheel screws.

Tighten the central screw of the pump.

Caution: Always replace the sealing ring. Tightening torque 15 Nm. In case of leaks, tighten no more than 25 Nm.

Install the timing belt guard.

Install the clutch cover.