Section of the oil pump of the M102 engine
Removing
The oil pump can be removed on the vehicle by first removing the timing cover.
Intermediate shaft lubrication
A - on carbureted engines
B - on engines with fuel injection
1 - fuel pump eccentric
2 - oil supply pipe to the eccentric
1. Disconnect the oil pickup pipe from the pump cover.
2. Remove the oil pump cover.
3. Remove the oil pump gears.
4. Check the condition of the gears, put them in place and check the clearances.
5. If the gears are hard to turn, the clearance limits are exceeded, or if the gears are damaged, replace the entire set of gears.
Installation
When installing, replace all seals and pay attention to the position of the suction pipe gasket and the tightening of the crankshaft pulley hub bolt. Fill with engine oil.
Note. The oil pump drive sprocket can only be installed in one position. Installation of the oil pump is carried out in the reverse order of removal.
Installing the oil pump sprocket (the arrows show the convex part, which should be directed towards the oil pump)