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Home >> Audi >> 2012 >> Q7 3.0 TDI >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> 3.0L - Turbocharger, Supercharger - Engine Code(S): CATA >> 21 Turbocharger, Supercharger >> Description And Operation >> Air Duct Pipes And Air Duct Hoses Overview, Vehicles Built Through 05.10

Air Duct Pipes And Air Duct Hoses Overview, Vehicles Built Through 05.10

NOTE:

Pay attention to the rules of cleanliness. Refer to CLEAN WORKING CONDITIONS .

Fig 1: Charge Air Cooler Pipes Overview
GWWA21-10274Courtesy of AUDI OF AMERICA, LLC
  1. Lower Air Duct Pipe
  2. Bolt
    • 9 Nm
  3. Seal
    • Replace
  4. Air Guide Hose
    • Removing, refer to Fig 3
    • Installing, refer to Fig 4
  5. Grommet
  6. Sleeve
  7. Bolt
    • 9 Nm
  8. Air Guide Hose
    • From the right charge air cooler
    • Removing, refer to Fig 3
    • Installing, refer to Fig 4
  9. O-rings
    • Replace
  10. Air Guide Hose
    • To the right charge air cooler
    • Removing, refer to Fig 3
    • Installing, refer to Fig 4
  11. Air Guide Hose
    • To the charge air cooler bypass control unit -J865-
  12. Right Air Duct Pipe
  13. Bolt
    • 9 Nm
  14. Bracket
    • For the right air duct pipe
  15. Bolt
    • 9 Nm
  16. Bolt
    • 9 Nm
  17. Engine Lifting Eye
  18. Air Guide Hose
  19. Grommet
  20. Sleeve
  21. Bolt
    • 9 Nm
  22. Upper Air Guide Pipe
    • To the left charge air cooler
  23. Bolt
    • 9 Nm
  24. O-ring
    • Replace
  25. Bolt
    • 9 Nm
  26. Charge Air Pressure Sensor -G31-
  27. O-ring
    • Replace
  28. Air Guide Hose
    • To throttle valve control module -J338-
  29. Air Duct Pipe in the Center
  30. Seal
    • Replace
  31. Charge Air Cooler Bypass Control Unit -J865-
  32. O-ring
    • Replace
  33. Air Guide Hose
    • From the left charge air cooler
    • Removing, refer to Fig 3
    • Installing, refer to Fig 4
Fig 2: Clamp Tightening Specifications
GWWA21-10396Courtesy of AUDI OF AMERICA, LLC
NOTE:

In order to be able to securely mount the air guide hoses on their connectors, spray the screws on the previously used clamps with a rust remover.

Tightening specification for

  1. Clamp -a- = 13 mm wide: 5.5 Nm
  2. Clamp -b- = 9 mm wide: 3 Nm
Fig 3: Checking For Secure Fit Of Lugs When Installing
GWWN21-0184Courtesy of AUDI OF AMERICA, LLC

-- Release the retaining tab -A- on the connector coupling by pulling the securing clip -arrow-.

-- Remove the air guide hose without using any tools.

Fig 4: Identifying Clip In Release And Lock Positions
GWWN21-10133Courtesy of AUDI OF AMERICA, LLC
NOTE:

Replace the O-ring for the air duct pipe and connector coupling if damaged.

Make sure the O-ring fits all the way around inside the groove on the air duct pipe.

Coat the sealing surface and the O-ring with a silicone-free lubricant.

-- Pull the clip into the release position -1-.

-- Install the air guide hose all the way and press the clamp into its locking position -2-.

-- Press the air guide hose on again and pull to make sure the connection is engaged correctly.