Overview - Charge Air System, 2.9L Engine-Side: Notes

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Fig 1: Exploded View Of Charge Air System, 2.9L Engine-Side

Courtesy of AUDI OF AMERICA, LLC

O-Ring
- Not available separately; replace if leaking -item : Intake Air Temperature Sensor -G42- /Manifold Absolute Pressure Sensor -G71- or damaged
Intake Air Temperature Sensor -G42- /Manifold Absolute Pressure Sensor -G71-
- Removing and Installing. Refer to Intake Air Temperature Sensor -G42- /Manifold Absolute Pressure Sensor -G71-, REMOVING AND INSTALLING .
Bolt
- 5 Nm
Upper Air Guide Pipe
- Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .
Bolt/Nut
- Tightening specification:
  - Bolt, 9 Nm
  - Nut, 20 Nm
Bracket
- For the lower air duct pipe
- There are different versions.
Bolt
- 9 Nm
Washer
Grommet
Air Duct Hose
Air Duct Hose
Lower Air Duct Pipe
- Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .
Bolt
- 9 Nm
O-Ring
- Only 2.9L engine with electrical compressor
- Not available separately; replace if leaking -item : Charge Air Pressure Sensor 2 -G447- or damaged
Charge Air Pressure Sensor 2 -G447-
- Only 2.9L engine with electrical compressor
- Removing and installing. Refer to Charge Air System ; Charge Air Pressure Sensor 2 -G447-, Removing and Installing
Bolt
- 9 Nm
- Only 2.9L engine with electrical compressor
Seal
- Not available separately; replace if leaking -item : Charge Air Cooler Temperature Sensor 1 -G763- or damaged
Charge Air Cooler Temperature Sensor 1 -G763-
- 22 Nm
- Removing and Installing. Refer to CHARGE AIR TEMPERATURE SENSOR, REMOVING AND INSTALLING .
Seal
- Replace after removing
Intake Manifold
- Removing and Installing. Refer to INTAKE MANIFOLD, REMOVING AND INSTALLING, 2.9L ENGINE .
Bolt
- 9 Nm
Seal
- Replace after removing
Turbocharger
- Cylinder Bank 1 (Right)
- Overview. Refer to OVERVIEW - TURBOCHARGER, 2.9L ENGINE .
Turbocharger
- Cylinder Bank 2 (Left):
- Overview. Refer to OVERVIEW - TURBOCHARGER, 2.9L ENGINE .
Intake Manifold with Crankcase Ventilation Hose
- Depending on the version, the replacement part is supplied with a new intake manifold with a changed position for the mounting tab for the wiring harness clip. If this is the case, the clip on the wiring harness must be repositioned appropriately.
- Removing and Installing. Refer to INTAKE MANIFOLD, REMOVING AND INSTALLING .
- The crankcase ventilation hose cannot be separated from the intake manifold. Note the information:
  - Crankcase Ventilation Hose on Intake Manifold, Rest of World Vehicles. Refer to Crankcase Ventilation Hose on Intake Manifold, Rest of World Vehicles .
  - Crankcase Ventilation Hose on Intake Manifold, USA Vehicles. Refer to Crankcase Ventilation Hose on Intake Manifold, USA Vehicles .
Seal
- Replace after removing
Bolt
- 9 Nm
Seal
- Replace after removing
Charge Air Cooler Temperature Sensor 2 -G764-
- 22 Nm
- Removing and Installing. Refer to CHARGE AIR TEMPERATURE SENSOR, REMOVING AND INSTALLING .
Seal
- Not available separately; replace if leaking -item : Charge Air Cooler Temperature Sensor 2 -G764- or damaged
Bolt
- 9 Nm
Lower Air Duct Pipe
- There are different versions.
- Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .
Spacer Sleeve
Throttle Valve Control Module -GX3-
- Removing and installing. Refer to Throttle Valve Control Module -GX3-, REMOVING AND INSTALLING .
- Cleaning. Refer to Throttle Valve Control Module -GX3-, CLEANING .
Seal
- Replace after removing
Connection
Bolt
- thread cutting
- Position the bolt by hand and tighten it until it finds the old threads. Then tighten the bolt to the specification.
- Tightening Specifications and Sequence. Refer to Figure.
Intake Manifold
- Overview. Refer to OVERVIEW - INTAKE MANIFOLD .
Seal
- Replace after removing
Bolt
- Thread cutting
- Position the bolt by hand and tighten it until it finds the old threads. Then tighten the bolt to the specification.
- Tightening Specifications and Sequence. Refer to Figure.
Seal
- Replace after removing
Bolt
- Tightening Specifications and Sequence. Refer to Figure.