Test sequence

WARNING: This page is about a different car, the 2003 Audi RS 6. However, it is still accessible from the selected car via links, so may be relevant.

Lock carrier to service position. See LOCK CARRIER, MOVING TO SERVICE POSITION .
Ribbed belt must be removed. See RIBBED BELT, REMOVING AND INSTALLING .

Unplug electrical connector -5- at Charge Air Pressure Sensor -G31-.
Loosen hose clamps -3- and -4-.
Pull off hoses at air recirculation valves.
Remove bolts -1- and -2- detach air intake pipe.

Fig 1: Removing Air Intake Pipe Bolts

Courtesy of AUDI OF AMERICA, INC.

Install aligning gauge 3201 onto A/C compressor pulley.
- Power steering pump pulley must align with compressor pulley.

Fig 2: Installing Aligning Gauge 3201 Onto A/C Compressor Pulley

Courtesy of AUDI OF AMERICA, INC.

If the two ribbed belt pulleys are not accurately aligned:

Remove bolts (arrows) from power steering pump pulley.

NOTE:

Use pin wrench 3212 as a brace when loosening and tightening bolts (arrows).
Installation position: marking "vorne" (front) on pulley faces in direction of travel

Fig 3: Installing Pin Wrench 3212

Courtesy of AUDI OF AMERICA, INC.

Bring vane pump pulley into alignment with A/C compressor pulley by installing appropriate shims (thicknesses 0.5, 1.0 or 1.5 mm. For part Nos, see Parts catalog.

Fig 4: Identifying Vane Pump Pulley
Courtesy of AUDI OF AMERICA, INC.
Then check alignment of pulleys once again using aligning gauge 3201. Repeat adjustment if necessary
NOTE:
- Replace O-ring for front air intake pipe.
- Secure all hose connections with correct hose clamps (same as original equipment). See Parts catalog.
- Remove any traces of oil or grease on hose connections and hoses for charge air system before installing. Do not apply lubricant.