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Home >> Audi >> 2007 >> A3 Base, Standard >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> 2.0L - Turbocharger, Supercharger - Engine Code(S): BPY >> 21 Turbocharger, Supercharger >> Description And Operation >> Turbocharger Overview

Turbocharger Overview

Part I 

Part II TURBOCHARGER OVERVIEW 

Part III TURBOCHARGER OVERVIEW 

Part IV TURBOCHARGER OVERVIEW 

Fig 1: Turbocharger Assembly Overview (Engine Codes AXX, BPY, BWA) -- Part I
GWWA21-10125Courtesy of AUDI OF AMERICA, LLC
  1. Turbocharger
    • Can only be replaced with exhaust manifold and pressure unit.
    • Removing and installing, refer to TURBOCHARGER 
  2. Gasket
    • Replace
  3. Bolt
    • 9 Nm
  4. Line for Crankcase Ventilation
  5. Heat Shield
  6. EVAP Line
  7. Turbocharger Vacuum Diaphragm
  8. Nipple
  9. Seal
    • Replace
  10. Hose
  11. Hose
  12. Bolt
    • 3 Nm
  13. Wastegate Bypass Regulator Valve -N75-
  14. Bolt
    • 8 Nm
  15. Seal
    • Replace
  16. Connection
  17. Securing Clip
  18. Bolt
    • 9 Nm
  19. Hose
  20. Bolt
    • 7 Nm
  21. Bracket
  22. Bolt
    • 7 Nm
  23. Turbocharger Recirculating Valve -N249-
    • Note installation position, refer to Fig 2
  24. Seal
    • Replace
Fig 2: Identifying Installation Position Of Turbocharger Recirculating Valve N249
GWWA21-10057Courtesy of AUDI OF AMERICA, LLC

-- Note installation position -arrows-.

Part II 

Part I TURBOCHARGER OVERVIEW 

Part III TURBOCHARGER OVERVIEW 

Part IV TURBOCHARGER OVERVIEW 

Fig 3: Turbocharger (Engine Code BHZ) Assembly Overview -- Part II
GWWA21-10055Courtesy of AUDI OF AMERICA, LLC
  1. Seal
    • Replace
  2. Bolt
    • 30 Nm
  3. Oil Supply Pipe
  4. Turbocharger
    • Can only be replaced with exhaust manifold and pressure unit.
    • Removing and installing, refer to TURBOCHARGER 
  5. Bolt
    • 9 Nm
  6. Bolt
    • 30 Nm
  7. Seal
    • Replace
  8. Bolt
    • 35 Nm
  9. Seal
    • Replace
  10. Coolant Supply Pipe
  11. Bolt
    • 23 Nm
  12. Bolt
    • 35 Nm
  13. Bolt
    • 9 Nm
  14. Seal
    • Replace
  15. Gasket
    • Replace
  16. Oil Return Pipe
  17. Bolt
    • 9 Nm
  18. Gasket
    • Replace

Part III 

Part I TURBOCHARGER OVERVIEW 

Part II TURBOCHARGER OVERVIEW 

Part IV TURBOCHARGER OVERVIEW 

Fig 4: Turbocharger Assembly Overview (Engine Codes AXX, BPY, BWA) -- Part III
GWWA21-10056Courtesy of AUDI OF AMERICA, LLC
  1. Gasket
    • Replace
  2. Bolt
    • Replace
    • 21 Nm
    • Coat stud bolts on exhaust manifold with hot bolt paste.
    • Hot bolt paste,
  3. Bolt
    • 35 Nm
  4. Seal
    • Replace
  5. Bolt
    • 9 Nm
  6. Bolt
    • 23 Nm
    • Not always present
  7. Coolant Return Pipe
  8. Turbocharger
    • Can only be replaced with exhaust manifold and pressure unit.
    • Removing and installing, refer to TURBOCHARGER 
  9. Bracket
  10. Bolt
    • 30 Nm
    • Coat bolt with hot bolt paste
  11. Bolt
    • 30 Nm
    • Coat bolt with hot bolt paste
  12. Bracket
  13. Bolt
    • 23 Nm
  14. Bolt
    • Replace
    • 30 Nm
    • Do not open to remove turbocharger
    • Coat stud bolts on exhaust manifold with hot bolt paste.
  15. Fastening Strip

Part IV 

Part I TURBOCHARGER OVERVIEW 

Part II TURBOCHARGER OVERVIEW 

Part III TURBOCHARGER OVERVIEW 

Fig 5: Turbocharger Assembly Overview (Engine Codes AXX, BPY, BWA) -- Part IV
GWWA21-10140Courtesy of AUDI OF AMERICA, LLC
  1. Turbocharger
    • Can only be replaced with exhaust manifold and pressure unit.
    • Removing and installing, refer to TURBOCHARGER 
  2. Turbocharger Vacuum Diaphragm
  3. Bolt
    • 10 Nm
  4. Securing Plate
  5. Bolt
    • 9 Nm
    • Secure with sealing wax
  6. Knurled Nut
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