Can be checked on an installed and removed engine. To check, you need a pointer-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.
Do not remove the cold start accelerator rod.
The timing belt tension must be normal.
Screw in a micrometer with an adapter 0PEL-KM-226 and a sealing copper ring instead of the central screw. Don't press too hard. Set the micrometer to 0. Figure B4712.
Continue turning the crankshaft until the mark on the flywheel aligns with the pointer. The micrometer should show 1.0±0.05 mm piston stroke.
If the value is not reached, adjust. To do this, remove the timing 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 an open-end wrench on the central screw.
Tighten the screws slightly.
Check the adjustment again. To do this, turn the crankshaft back 90°.
(Original posted on the website: OPELBOOK.ru)
After adjustment, tighten the wheel screws.
Tighten the central screw of the pump.
Attention! Always replace the sealing ring. Tightening force 15 Nm. In case of leaks, tighten no more than 25 Nm.
Install the timing belt guard.
Install the clutch cover.
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