Oil Pump: Service and Repair

Oil pump / crankshaft seal, front, replacing

Special tools:
999 5304 SEPARATOR 999 5304 Separator
999 5919 PULLER 999 5919 Puller
999 5455 PUNCH 999 5455 Punch
999 5433 COUNTERHOLD 999 5433 Counterhold

Preparation
Remove the timing belt. See Replacing the timing belt Removal and Replacement.
Check the tensioner and idler pulleys. See Replacing the timing belt Removal and Replacement.




Carefully pull away the timing gear pulley. Use puller 999 5304 SEPARATOR 999 5304 Separator.

When only replacing the front crankshaft seal




Remove the old seal. Use extractor 999 5919 PULLER 999 5919 Puller.
Clean sealing surfaces.
Lubricate and install the new seal. Use drift 999 5455 PUNCH 999 5455 Punch.
Press in drift and seal with crankshaft center nut.

Note! Ensure that the crankshaft does not rotate when pressing in the crankshaft seal.

Removing oil pump




Remove the four oil pump screws.
Carefully pry upward diagonally between the stop lugs and the cylinder block.
Lift out the oil pump.

Installing the oil pump




Install a new gasket.
Carefully insert the oil pump over the end of the crankshaft.

Note! The sealing ring in the oil pump is very easy to damage if not installed correctly.

Install four new screws as a guide.
Pull in the oil pump with drift 999 5455 PUNCH 999 5455 Punch and the crankshaft center nut.
Tighten the oil pump screws. Tighten to 10 Nm.
Install the timing gear pulley. Carefully tap alternately around the timing gear pulley until reaching its end position.

Note! The timing gear pulley can only be in one position on the crankshaft end splines.

Finishing




Install a new timing belt. See Replacing the timing belt Removal and Replacement.
Install the pulley for the auxiliaries belt. Locate the steering gear on the locating pin in the timing gear pulley.
Install the auxiliaries belt.
Install counterhold 999 5433 COUNTERHOLD 999 5433 Counterhold.
Tighten the crankshaft center nut. Tighten to 300 Nm.
Install the vibration damper using new screws. Tighten to 35 Nm. Angle-tighten 50°. Use the crankshaft center nut as a counterhold.

Final check
Check the engine oil level. Top up if necessary.
Test drive the engine.