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Home >> Audi >> 2024 >> S3 Premium Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 149 (Turbocharger, Supercharger (Servicing - 5-Cylinder 2.5L TFSI Engine)) >> 21 Turbocharger, Supercharger >> Turbocharger >> Overview - Turbocharger >> Part 1

Part 1

WARNING: This page is about a different car, the 2024 Audi RS 3. However, it is still accessible from the selected car via links, so may be relevant.

Part 2. Refer to Part 2 .

Fig 1: Exploded View Of Turbocharger (Part 1)
GWWA21-11114Courtesy of AUDI OF AMERICA, LLC
  1. Bolt
    • 9 Nm
  2. Oil Return Line
  3. Seal
    • Replace after removing
  4. Turbocharger
  5. Nut
    • 3-layer exhaust manifold gasket, tightening specifications and sequence. Refer to Fig 2.
    • 5-layer exhaust manifold gasket, tightening specifications and sequence. Refer to Fig 3.
  6. Retaining Plate
  7. Seal
    • Replace after removing
  8. O-Ring
    • Replace if damaged or leaking, if not available separately, then replace entire component
  9. Bolt
    • 9 Nm
  10. Oil Supply Line
  11. O-Ring
    • Replace if damaged or leaking, if not available separately, then replace entire component
  12. Bolt
    • 9 Nm
  13. Retaining Plate
  14. Tensioning Bracket
    • Remains installed when removing the turbocharger
  15. Bolt
    • 9 Nm
  16. O-Ring
    • Replace if damaged or leaking, if not available separately, then replace entire component
  17. Bolt
    • 9 Nm
  18. Coolant Line
  19. O-Ring
    • Replace if damaged or leaking, if not available separately, then replace entire component
  20. Nut
    • Replace after removing
    • Tightening specification and sequence. Refer to Fig 4.
  21. Bolt
    • 9 Nm
  22. Coolant Line
    • There are different versions. Refer to the Parts Information for the allocation.
  23. O-Ring
    • Replace if damaged or leaking, if not available separately, then replace entire component
  24. Bolt
    • M6: 9 Nm
    • M6: 20 Nm
  25. Bolt
    • 9 Nm

Turbocharger - tightening specifications and sequence, 3-layer exhaust manifold gasket

Fig 2: Identifying Turbocharger - Tightening Sequence
GWWA21-10479Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in steps in the sequence shown:

Step Nuts Tightening Specification
1. -1 to 6- 15 Nm
2. -5, 3, 1, 2, 4 and 6- 25 Nm
3. -5, 3, 1, 2, 4 and 6- 30 Nm 1)
4. -5, 3, 1, 2, 4 and 6- 30 Nm 1)
  • 1) These measures take into account the shrinkage of the turbocharger seal.

Turbocharger - tightening specifications and sequence, 5-layer exhaust manifold gasket

Fig 3: Identifying Turbocharger - Tightening Sequence
GWWA21-10479Courtesy of AUDI OF AMERICA, LLC

-- To ensure the settling of the exhaust manifold gasket, the exhaust manifold must be bolted as follows.

-- Tighten the bolts in steps in the sequence shown:

Step Nuts Tightening Specification
1. -1 to 6- Tighten until it makes contact
2.   Hammer the manifold downward with a suitable tool (such as a curved pry bar) and a hammer (so that the manifold sits deeper in the lower flange).
3. -1 to 6- Pre-tightening: 15 Nm
4.   Hammer the manifold downward again with a hammer (so that the manifold sits deeper in the flange).
5. -1 to 6- 25 Nm
6. -1 to 6- 30 Nm
7. -1 to 6- Tighten a quantity of 6 to 30 Nm 1)
  • 1) These measures take into account the shrinkage of the turbocharger seal.

Turbocharger tensioning bracket - tightening specifications and tightening sequence

Fig 4: Turbocharger Tensioning Bracket - Tightening Specifications and Tightening Sequence
GWWA21-11219Courtesy of AUDI OF AMERICA, LLC

-- Tighten the nuts in the sequence shown -1 to 6- to 30 Nm.

Heat shield - tightening specification

Fig 5: Heat Shield
GWWA21-11180Courtesy of AUDI OF AMERICA, LLC

Heat shield, version 1:

-- Tighten the bolts -arrows- for the heat shield -1- to 9 Nm.

Heat shield, version 2:

GWWA21-11647Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts -arrows- for the bracket -1- to 8 Nm +90°.

-- Tighten the bolts -upper arrows- for the heat shield -1- to 8 Nm.

GWWA21-11646Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolt -lower arrow- to 8 Nm + 90°.

Vacuum diaphragm - tightening specification

Fig 6: Vacuum Diaphragm
GWWA21-11391Courtesy of AUDI OF AMERICA, LLC
  1. Clip - replace after removing
  2. Lock Nut - 7 Nm
  3. Nut - 7 Nm
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