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Home >> Audi >> 2020 >> Q7 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (Turbocharger, Supercharger Servicing (2.9L & 3.0L)) >> 21 Turbocharger, Supercharger >> Charge Air System >> Overview - Charge Air System >> Overview - Charge Air System, 3.0L Engine-Side Version 1 >> Crankcase Ventilation Hose on Intake Manifold, USA Vehicles

Crankcase Ventilation Hose on Intake Manifold, USA Vehicles

WARNING: This page is about a different car, the 2022 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
GWWA21-11376Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Risk of a violating emissions legislation on USA vehicles by the intake of leaked air.

- Do not open the hose connection on the crankcase ventilation.

The crankcase ventilation hose -2- must not be disconnected from the intake manifold -1- on USA vehicles.

Check the O-Rings for Damage

Fig 1: Check the O-Rings For Damage
GWWA21-11243Courtesy of AUDI OF AMERICA, LLC

-- Check the O-rings for damage and replace if necessary.

  1. O-Ring (Black)
  2. O-Ring (Blue)
  3. Crankcase Ventilation Hose 1
  4. Crankcase Ventilation Hose 1
  5. EVAP System Hose 1
  6. O-Ring (Black)
  7. O-Ring (Orange)
  8. Crankcase Ventilation Hose 1
  9. Vacuum Hose

1 the O-ring is not sold separately; if damaged or leaking, then replace the crankcase ventilation hose.

Upper Air Duct Pipe - Tightening Specification and Sequence

Fig 2: Upper Air Duct Pipe - Tightening Specification and Sequence
GWWA21-11175Courtesy of AUDI OF AMERICA, LLC

(shown on a 3.0L engine).

-- Tighten the bolts in the steps in the sequence shown:

Step Bolts Procedure/Tightening Specifications
1.   Bringing the air duct pipe in the installation position
2a. -1 to 7-
  • Air duct pipe on the previous intake manifold:
Position and install by hand all the way by doing this the bolts find the previous threads
2b. -1 to 3-
  • Air duct pipe on the new intake manifold:
Replace and install all the way by hand.
3. -2 through 7- 6 Nm
4. -1- 9 Nm

Throttle Valve Control ModuleGX3 - Tightening Specification and Sequence

Fig 3: Throttle Valve Control Module -GX3-
GWWA24-11723Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in steps:

Step Bolts Procedure/Tightening Specifications
1.   Bring the Throttle Valve Control Module -GX3- with the connection in the installation position
2. -arrows- Position and install by hand diagonally all the way by doing this the bolts find the previous threads
3. -arrows- 5 Nm diagonally
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