Engine Lubrication: Service and Repair

Lubrication system components, removing and installing

Note:
^ If large quantities of metal shavings or particles are found in the engine oil when repairing an engine, clean the oil passages carefully, and replace the oil cooler in order to prevent further damage occurring later.
^ The oil level must not be above the max. mark - danger of damage to the catalyst.
^ Oil spray jet and pressure relief valve Fig. 1

Viscosity grades and oil specifications:

Part I





1. 28 Nm
2. Stop for torque reaction support
3. Oil pan
^ Apply silicone sealant: D 176 404 A2 before installing

4. Oil pump
^ With pressure relief valve, 12 bar
^ Before installing, check that two dowel sleeves -12- for centering oil pump/cylinder block are installed
^ Replace pump if there is scoring on moving surfaces and gear teeth
^ Tightening torque for oil pump cover to oil pump housing: 10 Nm





5. Oil pump chain sprocket
^ Sprocket can only be installed on oil pump shaft in one position

6. 22 Nm
7. Drive chain for oil pump
^ Mark direction of rotation before removing
^ Check for wear

8. 15 Nm
9. Front sealing flange
^ Apply silicone sealant D 176 404 A2 before installing
^ Replacing crankshaft oil seal pulley end





10. Chain tensioner
^ Tighten to 16 Nm
^ Do not disassemble
^ Note installed position
^ Pre-tension spring and engage before installing
^ If spring is broken, replace complete chain tensioner

11. Oil pump chain sprocket
12. Dowel sleeves
^ 2 pcs.

13. O-ring
^ Always replace

14. 16 Nm
^ 15-Suction line
^ Clean strainer if soiled





16. Baffle plate
17. 16 Nm
18. 15 Nm
^ Tighten in stages and diagonally
^ Note tightening sequence

19. 40 Nm
20. Sealing ring
^ Replace

21. Oil drain plug, 30 Nm
22. Gasket
^ Always replace

23. Oil return line
^ From turbocharger

24. 10 Nm





Fig. 1 Oil spray jet and pressure relief valve

1 - Oil spray jet (for piston cooling)
2 - Bolt with pressure relief valve, 27 Nm
^ Opening pressure 1.3 to 1.6 bar

Part II





1. Screw plug, 40 Nm
2. Sealing ring
^ Always replace

3. Spring
^ For pressure relief valve, approximately 4 bar

4. Piston
^ For pressure relief valve, approximately 4 bar

5. Gasket
^ Always replace

6. Oil retention valve
^ Tighten to 8 Nm
^ Integrated in oil filter holder

7. O-ring
^ Always replace
^ Slide on until flush with collar on line -9-





8. Retaining clip
9. Line
^ For crankcase breather

10. 20 Nm
^ Apply locking fluid D 000 600 A2 when installing

11. Lower coolant line
12. Screw plug, 15 Nm
13. Sealing ring
If. seal is leaking, cut open and replace

14. Oil supply line
^ To turbocharger

15. Banjo bolt, 30 Nm
16. Sealing rings
^ Always replace





17. Oil pressure switch -F1-, 1.4 bar, 25 Nm
^ Black insulation

18. Sealing ring
If. seal is leaking, cut open and replace

19. 15 Nm plus additional 90°turn
^ Always replace

20. Gasket
^ Always replace
^ Engage in projections on oil cooler

21. Oil filter
^ Note replacement intervals
^ Observe installation instructions on oil filter
^ Tighten to 20 Nm





22. 25 Nm
23. Oil cooler
^ Ensure clearance to adjacent components
^ Coolant hose connection diagram

24. Oil filter holder
^ With pressure relief valve approximately 4 bar