64 52 523 Replacing air conditioning system compressor (N55) (Version 1)

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Special tools required:

WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Read and comply with safety instructions:

Handling R 134a refrigerant . See 64 50... NOTE FOR HANDLING R134A REFRIGERANT or 64 50... SAFETY INFORMATIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A
HANDLING REFRIGERANT FLUID

IMPORTANT: Risk of damage!
Restart engine only when A/C system has been correctly filled.
Read and comply with notes on compressor replacement. See 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN) or 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) .

FOLLOW NOTES FOR OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .

If Air conditioning is opened for more than 24 h:

Replace desiccant insert for air conditioning system. See 64 53 517 REPLACING DESICCANT INSERT FOR AIR CONDITIONING SYSTEM .

Necessary preliminary work:

DRAWING OFF, EVACUATING AND FILLING THE AIR CONDITIONING are not included in the time value given for this job item
REMOVE COMPRESSOR DRIVE BELT
Remove left CHARGE AIR DUCT

IMPORTANT: Seal openings or lines on compressor with special tool 32 1 270 to prevent escape of media and dirt contamination.

Unfasten plug connection (1) and disconnect.

Release screws (2) and remove refrigerant lines (3).

Tightening torque 64 52 1AZ .

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 1: Identifying Plug Connection, Screws And Refrigerant Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) at holder for refrigerant lines (2) and pull out, including spacer sleeve.

Fig 2: Identifying Refrigerant Lines And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Tightening torque 64 52 3AZ .

Fig 3: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Shown with clearance for better clarity.

Release screw (1).

Tightening torque 64 52 3AZ .

Fig 4: Identifying Air Conditioning System Compressor Screw (N55)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Seal openings or lines on compressor with special tool 32 1 270 to prevent escape of media and dirt contamination.

NOTE: Secure compressor (2) against falling off/down.

Release screw (1).

Tightening torque 64 52 3AZ .

Lift out compressor (2).

Fig 5: Identifying Compressor And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement:

Adjust the amount of refrigerant oil in the new compressor . See 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) or 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN)
IMPORTANT: Danger of compressor damage!
Danger of customer complaints due to reduced cooling power of the Air conditioning!
Before the installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor!
The safety information must be observed . See 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR NOT KNOWN) or 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR KNOWN) !

After installation:

EVACUATE AND FILL AIR CONDITIONING SYSTEM