Turbocharger Components

Charge air system with turbocharger

Turbocharger With Attachments, Removing And Installing

Part I






1. 40 Nm
Coat threads with G 052 112 A3

2. Seal

3. 10 Nm
Must not be loosened

4. Pressure unit
For charge air pressure regulating valve
Can only be replaced together with turbocharger

5. Circlips

6. Turbocharger
Boost pressure regulation.
Charge air pressure control valve and charge air pressure control valve vacuum unit are components of the turbocharger and cannot be replaced individually
Fill turbocharger with oil via the connection before connecting the oil supply pipe
After installing turbocharger, let engine idle for approx. 1 minute without increasing engine speed. This ensures adequate oil supply to the turbocharger.

7. O-ring
8. 10 Nm
9. Intake pipe

10. Gasket
Replace
Note installed position

11. 20 Nm
12. Heat shield
13. 10 Nm
14. Banjo bolt, 30 Nm
15. Oil supply pipe

16. 30 Nm
Replace
Coat threads and bolt head contact surface with G 052 112 A3

17. Exhaust manifold

18. Gasket
Replace
Note installed position

19. 20 Nm
20. Banjo bolt, 30 Nm

21. 25 Nm
Replace
Coat threads with G 052 112 A3

22. Banjo bolt, 35 Nm
23. Coolant return pipe
24. 25 Nm
25. Spacer sleeve
26. Banjo bolt, 35 Nm
27. 10 Nm
28. Coolant supply pipe
29. Banjo bolt, 35 Nm

30. 30 Nm
use only original bolts from parts catalog

31. Retainer
Between turbocharger and cylinder block

32. 25 Nm
33. Gasket
Replace

34. Gasket
Replace

35. 10 Nm

36. Oil return pipe
To oil pan

37. 10 Nm

38. 10 Nm
Do Not alter setting
Must not be loosened

Part II

Notes: Components marked with an * are checked by the On Board Diagnostic (OBD).
Components marked with ** are checked by the Output Diagnostic Test Mode.
Observe installed position of heat protection mats






1. Overrun shut-off valve
Checking, refer to Testing and Inspection - Procedures Testing and Inspection

2. Connection pipe/hose
To Recirculating valve for turbocharger -N249- *

3. Pressure regulation valve
For cylinder block housing ventilation

4. Connection pipe/hose
from deceleration shut-off valve to upper air guide pipe

5. to cylinder block housing ventilation
6. From air filter

7. upper air guide pipe
Observe installed position of heat protection mat
Vehicles with engine code AWP, AWW with quick-release connection (with O-ring and securing brace)
Vehicles with engine code AWD with screw-type clamps

8. Bracket
9. 40 Nm
10. 25 Nm
11. For connecting hose of connecting piece/charge air cooler at bottom

12. O-ring
Replace
only vehicles with engine code AWP, AWW

13. Circlip
Check for secure fitting
only vehicles with engine code AWP, AWW

14. 10 Nm
15. from turbocharger/exhaust tube
16. Connection pipe/hose

17. Connection pipe/hose
to pressure unit for charge pressure regulation valve

18. Circlip
Check for secure fitting

19. O-ring
Replace

20. Intake hose
to intake connection of exhaust turbocharger

21. Wastegate Bypass Regulator Valve -N75- */**
Valve is activated (pulsed) by the Engine Control Module (ECM)