64 52 523 Replacing air conditioning compressor (N20)
Special tools required:
Risk of damage.
Restart engine only when A/C system has been correctly filled.
Read and comply with notes on compressor replacement: See AMOUNT OF REFRIGERANT OIL NOT KNOWN or AMOUNT OF REFRIGERANT OIL KNOWN .
Follow notes for OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .
If air conditioning is opened for more than 24 hours:
Replace DESICCANT INSERT for heating and air conditioning system. Read all notes regarding desiccant insert replacement on this vehicle.
Seal openings or lines on compressor with special tool 32 1 270 to prevent escape of media and dirt contamination.
Necessary preliminary tasks:
- Drain off AIR CONDITIONING SYSTEM
- Remove DRIVE BELT for alternator
- Remove left CHARGE AIR DUCT
Open the holder (1) with suitable tools.
Unclip refrigerant line (2) from holder (1)
Installation note:
Check that the refrigerant line (2) is correctly seated in the holder (1)!
Release screws (1) and remove refrigerant lines (2).
Tightening torque 64 52 1AZ .
Unfasten plug connection (3) and disconnect.
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.
Release screws (1).
Tightening torque 64 52 4AZ .
Feed out compressor (2) upwards to the front.
Replacement:
Risk of compressor damage!
Risk of reduced cooling power of the air conditioning system!
Observe SAFETY INFORMATION .
Before installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor:
After installation:
- Evacuate and fill AIR CONDITIONING SYSTEM