Overview - Turbocharger, Vehicles With Engine Code CGQB

Part 1

Fig 1: Overview Of Turbocharger - Part 1

Courtesy of AUDI OF AMERICA, LLC

1. EGR Pipe
   • To cooler for exhaust gas recirculation
   • If the screw-type clamps were loosened, then the EGR pipe and the screw-type clamp must always be replaced
   • Tightening specification and sequence, refer to Figure.
2. Seal
   • Replace
3. Union Nut
   • 25 Nm
     NOTE:

     When loosening the threaded connection counter-hold at the adaptor guard, during assembly check that the adaptor guard is secure.

4. Oil Return Pipe
5. Bolt
   • 9 Nm
6. O-Ring
   • Replace
7. Bolt
   • 9 Nm
8. Seal
   • Replace
9. Seal
   • Replace if damaged
10. Bolt
    • 9 Nm
11. Connection
12. Bypass valve
    • Installed position Fig 2
13. Clip
    • Installed position Fig 2
    • 6 Nm
14. O-Ring
    • Replace
15. Seals
    • with Connection ridge
    • Replace
16. Banjo Bolt
    • 15 Nm
      NOTE:

      When loosening the threaded connection counter-hold at the adaptor guard, during assembly check that the adaptor guard is secure.

17. Oil supply line
18. Seals
    • Replace
19. Banjo Bolt
    • 15 Nm
20. O-Ring
    • Replace
21. Intermediate Pipe
22. O-Ring
    • Replace
23. Connecting pipe
24. Seal
    • Replace
25. Charge Air Pressure Sensor 2 -G447-
    • 25 Nm
26. Bolt
    • 7 Nm
27. O-Ring
    • Replace
28. Banjo Bolt
    • 35 Nm
      NOTE:

      When loosening the threaded connection counter-hold at the adaptor guard, during assembly check that the adaptor guard is secure.

29. Banjo Bolt
    • 35 Nm
      NOTE:

      When loosening the threaded connection counter-hold at the adaptor guard, during assembly check that the adaptor guard is secure.

30. Seals
    • with Connection ridge
    • Replace
31. Seals
    • with Connection ridge
    • Replace
32. Coolant Supply Line
    • Illustration does not correspond to version in vehicle.
33. Bolt
    • 9 Nm
34. Union Nut
    • 25 Nm
      NOTE:

      When loosening the threaded connection counter-hold at the adaptor guard, during assembly check that the adaptor guard is secure.

35. turbocharger assembly
    • with
      • High Pressure Turbocharger
      • Low Pressure Turbocharger
    • Removing and installing, refer to TURBOCHARGER, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
36. Bolt
    • 9 Nm
37. Coolant Supply Line
38. Bolt
    • 9 Nm
39. O-Ring
    • Replace
40. Bolt
    • Tightening specification and sequence, refer to Fig 7.

Fig 2: Identifying Position Of Bypass Valve And Clamp

Courtesy of AUDI OF AMERICA, LLC

• Bypass valve -3- and clamp -2- must be aligned on the edge -1- of the turbocharger assembly.
• Clamp fitting tolerance ± 10°.

Part 2

Fig 3: Overview Of Turbocharger - Part 2

Courtesy of AUDI OF AMERICA, LLC

1. turbocharger assembly
   • with
     • High Pressure Turbocharger
     • Low Pressure Turbocharger
   • Removing and installing, refer to TURBOCHARGER, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
2. Vacuum Diaphragm
   • for Low Pressure Turbocharger
   • Removing and installing, refer to LOW PRESSURE TURBOCHARGER VACUUM DIAPHRAGM, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
   • Adjusting, refer to LOW PRESSURE TURBOCHARGER VACUUM DIAPHRAGM, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
   • Tightening specification for the actuator rod lock nut: 7Nm
3. Nut
   • 7 Nm
4. Lock Washer
   • Replace
5. Bolt
   • 7 Nm
6. Bracket
   • For Turbocharger Control Module 1 -J724-
7. Turbocharger Control Module 1 -J724-
   • for High Pressure Turbocharger
   • Removing and installing, refer to Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
8. Bolt
   • 7 Nm
9. Lock Washer
   • Replace
10. Actuator Rod
11. Bolt
    • 23.5 Nm
12. Lock Washer
    • Replace
13. Vacuum Diaphragm
    • for Turbine Switch-Over between High and Low Pressure
    • With Control Valve Position Sensor -G584-
    • Removing and installing, refer to TURBINE SWITCH-OVER VACUUM DIAPHRAGM, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
    • Adjusting, refer to TURBINE SWITCH-OVER VACUUM DIAPHRAGM, ADJUSTING, VEHICLES WITH ENGINE CODE CGQB .
    • Tightening specification for the actuator rod lock nut: 11 Nm
14. Bolt
    • 23.5 Nm
15. Lock Washer
    • Replace

Part 3

Fig 4: Overview Of Turbocharger - Part 3

Courtesy of AUDI OF AMERICA, LLC

1. Seal
   • Replace
2. Bracket
   • For the turbocharger
3. Bolt
   • Tightening specification and sequence, refer to Fig 5.
4. O-Ring
   • Replace
5. Bolt
   • 9 Nm
6. Oil return flange
7. Seal
   • Replace
8. Bolt
   • 23 Nm
9. Low Pressure Turbocharger
   • Removing and installing, refer to TURBOCHARGER, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
10. Nut
    • Tightening specification and sequence, refer to Fig 6.
11. Bolt
    • 60 Nm
12. Seal
    • Replace
13. High Pressure Turbocharger
    • Removing and installing, refer to TURBOCHARGER, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODE CGQB .
14. Bolt
    • 23 Nm
15. Brace
    • For the turbocharger
16. Bolt
    • 23 Nm
17. Bolt
    • Tightening specification and sequence, refer to Fig 6.
18. Seal
    • Replace
19. Bolt
    • 23.5 Nm
20. Intermediate Flange
    • With clamp (refer to OVERVIEW - EXHAUST MANIFOLD, VEHICLES WITH ENGINE CODE CGQB => List Item:Clip ) attach to Exhaust Manifold
21. Bolt
    • Tightening specification and sequence, refer to Fig 5.

Fig 5: Turbocharger Bracket - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in four steps in the sequence shown.

Fig 6: Low Pressure Turbocharger On High Pressure Turbocharger

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in seven stages in the sequence shown.

Fig 7: EGR Pipe At Turbocharger - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC