6452521 Replacing A/C system compressor (N51)
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 335xi, and 2010 BMW 335i. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Risk of injury!
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R 134a refrigerant See 6450... SAFETY INSTRUCTIONS FOR HANDLING R134A REFRIGERANT or 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for HANDLING REFRIGERANT OIL .
Avoid contact with refrigerant and refrigerant oil.
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R 134a refrigerant See 6450... SAFETY INSTRUCTIONS FOR HANDLING R134A REFRIGERANT or 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for HANDLING REFRIGERANT OIL .
Avoid contact with refrigerant and refrigerant oil.
IMPORTANT:
Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released .
The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released .
The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
IMPORTANT:
Risk of damage!
Restart engine only when air conditioning system has been correctly filled.
READ AND COMPLY WITH NOTES ON REPLACING COMPRESSOR .
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours:
REPLACE DESICCANT INSERT FOR A/C SYSTEM .
Restart engine only when air conditioning system has been correctly filled.
READ AND COMPLY WITH NOTES ON REPLACING COMPRESSOR .
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours:
REPLACE DESICCANT INSERT FOR A/C SYSTEM .
Necessary preliminary tasks:
- DRAWING OFF, EVACUATING AND FILLING THE A/C SYSTEM are not included in the time value given for this work operation
- Release expansion tank and place to one side
- Remove FAN COWL
- Remove air conditioning COMPRESSOR DRIVE BELT
- Remove COOLANT THERMOSTAT
Release screws (1, 2) and remove refrigerant lines.
Tightening torque 64 52 COMPRESSOR .
Installation:
Replace sealing rings.
Use special tool 00 9 030 WEDGE to mount sealing rings without damaging them.
Disconnect plug connection (3).
IMPORTANT:
Close openings or line to compressor with special tool 32 1 270
, to avoid media leak and dirt contamination.
NOTE:
Secure compressor (3) against falling out.
Release screw (1).
Unfasten screws (2).
Tightening torque 64 52 3AZ, see 64 52 COMPRESSOR .
Remove compressor towards front.
After installation