Oil Pump, Oil Pan and Balance Shaft Module Assembly Overview

Oil Pump, Oil Pan and Balance Shaft Module Assembly Overview

• If large quantities of metal particles or abraded material are detected during engine repairs, it may mean the crankshaft or rod bearings are damaged. To prevent damage, perform the following steps after completing the repair: carefully clean the oil channels and replace the oil spray jets, the oil cooler and the oil filter.

• Oil capacities, specifications and viscosity classes.

• Oil spray nozzle and pressure relief valve => [ Oil Spray Jet and Pressure Relief
Valve ] Service and Repair.






1 Oil Pan

• Removing and installing, refer to => [ Oil Pan ] Service and Repair

2 Bolt

• 20 Nm

3 Suction Line

• Clean strainer if contaminated

4 Bolt

• 9 Nm

5 O-ring

• Replace

6 Oil Pump

• Removing and installing, refer to => [ Oil Pump ] Oil Pump

• Make sure both alignment bushings for centering the oil pump to the balance shaft assembly are actually there before installing.

7 Driveshaft for Oil Pump

8 Circlip

• Must lie in the base of the groove

• Replace damaged or stretched circlips

9 Balance Shaft Spur Gear

10 Bolt

• Replace

• 20 Nm plus an additional 90° turn

11 Hub

• Replace

• For the intermediate sprocket

12 Bolt

• Replace

• 90 Nm plus an additional 90° turn

13 Axial Bearing Disc

• Replace

• For the intermediate sprocket

14 Intermediate Sprocket

• Replace

• To achieve the correct backlash, a coating is applied to the intermediate sprocket. The correct play is achieved as the coating wears away.

• With intermediate sprockets that only have a coating on parts of the circumference, a white dot is applied to ensure the correct installation position

• If there is no white dot, the entire circumference of the intermediate sprocket is coated

• Installed position: the part number must be visible

• Make sure the axial bearing disc fits correctly

15 Axial Bearing Disc

• For the intermediate sprocket

• Replace

• Installed location

• For installing the intermediate sprocket, secure to the balance shaft assembly with grease

16 Crankshaft Toothed Gear

17 Balance Shaft Module

• Removing, refer to => [ Balance Shaft Module, Removing ] Balance Shaft Module, Removing

• Installing a used balance shaft assembly, refer to => [ Used Balance Shaft Module, Installing ] Used Balance Shaft Module, Installing

• Installing a new balance shaft assembly, refer to => [ New Balance Shaft Assembly, Installing ] New Balance Shaft Assembly, Installing

• Make sure both alignment bushings for centering the balance shaft assembly to the cylinder block are actually there before installing.

18 Bolt

• Replace

• Tightening specification and sequence

19 Bolt

• 9 Nm

20 Oil Suction Pipe

21 Bolt

• 9 Nm

22 Seal

• Replace

23 Oil Level Thermal Sensor (G266)

• Removing and installing, refer to => [ Oil Level Thermal Sensor ] Service and Repair

24 Bolt

• Self-locking

• Replace

• 9 Nm

25 Bolt

• Tightening specification and sequence

26 Seal

• Replace

27 Oil Drain Plug

• 30 Nm

Oil Pan - Tightening Specifications and Sequence





- Tighten the bolts in 3 stages in a diagonal sequence as follows:






Axial Bearing Disc Installed Position






Danger of the axial bearing disc slipping behind the intermediate gear.

• Make sure the axial bearing disc - A - does not slip out of the recesses on the balance shaft assembly during installation - arrows - which could then get stuck. Secure to the balance shaft assembly with grease if necessary.

Balance Shaft Assembly - Tightening Specification and Sequence