Compressor, removing and installing (vehicles with 8 cyl. engine): Installing
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- The compressor removed contains an indeterminate amount of refrigerant oil. Attention is therefore to be paid to notes on compressor replacement.
- Install compressor drive shaft (in drive pinion) and check both proper attachment and corresponding socket → Compressor drive shaft, removing and installing .
- If necessary, remove bushings - C - from compressor bracket.
- Thoroughly clean contact surfaces - A - and - B - at bracket (as well as contact surfaces at compressor).
- Fit bushings - C - in compressor bracket.
NOTE:
- Pay attention to correct positioning of bushings - C - as well as clean contact surfaces. Incorrectly installed bushings or dirty/damaged contact surfaces could lead to misalignment between compressor and engine. In the course of operation, misalignment results in drive shaft or compressor damage.
- Check type of seal at connections and refrigerant lines (must be designed for same type of seal) → Connections of refrigerant lines to the components (different versions)
- Install compressor with bolts - D - (and washers - E -) to bracket (tightening torque 25 Nm).
- Install refrigerant lines to compressor (tightening torque of bolts - A - 25 Nm). For dimensions of O-rings - B - and - C - and further information, refer to → Refrigerant lines on compressor, removing and installing .
Fig 3: Using Open-Ended Wrench To Hold Compressor Drive Shaft In Position And Turning Compressor Drive Unit
- After installation of a new compressor or after adding fresh refrigerant oil to compressor (e.g. after blowing out refrigerant circuit), give compressor approx. 10 turns by hand by way of compressor drive unit - B - in direction of arrow - C - before tightening drive shaft so as to avoid compressor damage.
- Tighten drive shaft. Use open-ended wrench to hold compressor drive shaft - A - in position and turn compressor drive unit - B - in direction of arrow - D - (tightening torque 60 Nm).
Fig 4: Using Open-Ended Wrench To Hold Compressor Drive Shaft In Position And Turning Compressor Drive Unit
NOTE:
- Drive shaft - A - must not be turned.
- After installing drive shaft - A -, check installation position of socket - E -.
- Reinstall remaining components removed.
- Evacuate and fill refrigerant circuit. → 87 - AIR CONDITIONING
- Start up air conditioner after mounting compressor → A/C system, running after mounting compressor