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Home >> Audi >> 2017 >> A4 Prestige >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Turbocharger, Supercharger [CYMC,CYRB,CYRC,CWPB,DAXB,DAXC,CJEB,CJED,CJEE,CNCD,CNCE,CUHA,CUJA,CNCB,CUHB,DAYB,CYGA,CYNB,CYPA,CYPB,CYYA,CVJA,DDWA,DJYA,DKWA,DNTA,DKNA,DLHA,DLHB,DMFA,DKWB,DLGA] >> 21 Turbocharger, Supercharger >> Turbocharger >> Overview - Turbocharger >> Part I

Part I

Part II. Refer to Part II .

Fig 1: Exploded View Of Turbocharger
GWWA21-11555Courtesy of AUDI OF AMERICA, LLC
  1. Bolt
    • 25 Nm
  2. Oil Return Line
  3. O-Ring
    • Always replace after removing.
    • Coat with engine oil
  4. O-Ring
    • Always replace after removing.
    • Coat with engine oil
  5. Turbocharger
  6. Nut
    • Replace after removing
    • Coat the stud bolts with hot bolt paste. Refer to the appropriate Electronic Parts Information.
    • Tightening specification and sequence. Refer to  2
  7. Threaded Pin
    • 16 N.m
  8. Seal
    • Replace after removing.
  9. Bracket
  10. Coolant Return Line
  11. Bolt
    • 9 Nm
  12. O-Ring
    • Always replace after removing.
    • Coat with coolant
  13. Turbocharger Recirculation Valve -N249-
  14. Bolt
    • 9 Nm
  15. O-Ring
    • Always replace after removing.
  16. O-Ring
    • Always replace after removing.
  17. Connection
  18. Bolt
    • 9 N.m
  19. Bolt
    • 9 Nm

Turbocharger Recirculation Valve N249 Installation Position 

Fig 2: Identifying Installation Position Of Turbocharger Recirculating Valve
GWWA21-10057Courtesy of AUDI OF AMERICA, LLC

-- Note the installation location -arrows-.

  1. Turbocharger/catalytic converter threaded pin connection - tightening specifications 

    -- Tighten the threaded pins -arrows- to 24 N.m.

    GWWA21-11652Courtesy of AUDI OF AMERICA, LLC
  2. Turbocharger - tightening specifications and sequence 
    GWWA21-11563Courtesy of AUDI OF AMERICA, LLC
    • Replace the nuts after removing.

    -- Tighten the nuts in stages in the sequence shown

    Step  Nuts  Tightening Specifications 
    1. -1 to 4- Install all the way by hand
    2. -1 and 2- 10 N.m
    3. -3 and 4- 25 N.m
    4. -1 and 2- 25 N.m