Overview - Charge Air System, Engine-Side, AUDI A8

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

Courtesy of AUDI OF AMERICA, LLC

1. Air Duct Hose
2. Right lower air duct pipe on the turbocharger
   • Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .
3. Bolt
   • 9 Nm
4. O-Ring
   • Replace after removing
5. O-Ring
   • Red
   • Replace after removing
6. Venturi Injector/Plug
   • Quantity: 2
7. O-Ring
   • Green
   • Replace after removing
8. Bolt
   • 9 Nm
9. Upper Air Guide Pipe
   • There are different versions. Refer to the Parts Information.
   • Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .
   • Disconnect and connect the crankcase ventilation hose. Refer to Figure.
10. Bolt
    • 9 Nm
11. Seal
    • Replace after removing
12. Turbocharger
    • Cylinder Bank 1 (Right)
    • Overview. Refer to OVERVIEW - TURBOCHARGER .
13. Turbocharger
    • Cylinder Bank 2 (Left):
    • Overview. Refer to OVERVIEW - TURBOCHARGER .
14. Seal
    • Replace after removing
15. O-Ring
    • Grey
    • Replace after removing
16. O-Ring
    • Red
    • Replace after removing
17. O-Ring
    • Black
    • Replace after removing
18. O-Ring
    • Blue
    • Replace after removing
19. Line
    • For the EVAP system
    • Installed depending on the version. Refer to the Parts Information.
20. O-Ring
    • Replace after removing
21. Bolt
    • 9 Nm
22. Bolt
    • 5 Nm
23. Throttle Valve Control Module
    • Throttle Valve Control Module -GX3- Cylinder Bank 1 (right)
    • Throttle Valve Control Module 2 -GX4- Cylinder Bank 2 (left)
    • Overview. Refer to OVERVIEW - INTAKE MANIFOLD .
24. O-Ring
    • Replace after removing
25. Bolt
    • thread cutting
    • Position the bolt by hand and tighten it until it finds the old threads. Then tighten the bolt to the specification.
    • 3.5 Nm
26. Bracket
    • For the air duct pipe
27. Lower Air Duct Pipe on Throttle Valve Control Module
    • Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .
28. Bolt
    • 7 Nm
29. O-Ring
    • Replace after removing
30. Charge Air Pressure Sensor
    • Charge Air Pressure Sensor -G31- cylinder bank 1 (right)
    • Removing and installing. Refer to Charge Air Pressure Sensor -G31-, REMOVING AND INSTALLING
      • Charge Air Pressure Sensor 2 -G447- Cylinder Bank 2 (left)
    • Removing and installing. Refer to Charge Air Pressure Sensor 2 -G447-, REMOVING AND INSTALLING
31. Left lower air duct pipe on the turbocharger
    • Removing and installing. Refer to AIR DUCT PIPE, REMOVING AND INSTALLING .

Crankcase Ventilation Hose on the Upper Air Duct Pipe, Rest of World Market Versions Excluding Engine Codes DWPA

Fig 2: Crankcase Ventilation Hose on the Upper Air Duct Pipe

Courtesy of AUDI OF AMERICA, LLC

The crankcase ventilation hose -2- cannot be removed from the air duct pipe -1- without damage.

• Replace the crankcase ventilation hose after removal.

-- Pry out the crankcase ventilation hose carefully using a screwdriver at the same time do not damage the air duct pipe.

-- Attach the new crankcase ventilation hose until it audibly locks on the air duct pipe.

Crankcase Ventilation Hose on the Upper Air Duct Pipe, North American Versions Excluding Engine Codes DWPA

Fig 3: Crankcase Ventilation Hose on the Upper Air Duct Pipe

Courtesy of AUDI OF AMERICA, LLC

-- Do not disconnect the hose -2- for the crankcase ventilation.

• The crankcase ventilation hose is not available separately.
• The crankcase ventilation hose is available in the air duct pipe delivery package -1-.