64 52 524 Removing and installing/replacing heating and air conditioning system compressor (N63, with Dynamic Drive)

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Special tools required:

WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Follow safety information for handling R-134a refrigerant. . See 64 50... NOTE FOR HANDLING R134A REFRIGERANT or 64 50... SAFETY INFORMATIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A .

Avoid contact with refrigerant and refrigerant oil.

FOLLOW SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT OIL

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 NOT KNOWN) or 64 52... NOTES FOR CHANGING THE AIR CONDITIONING COMPRESSOR (AMOUNT OF REFRIGERANT OIL OF NEW AIR CONDITIONING COMPRESSOR 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 A/C SYSTEM .

WARNING: DANGER OF POISONING if hydraulic fluid is ingested or absorbed through the skin!
DANGER OF INJURY if hydraulic fluid comes in contact with eyes or skin!

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Do not draw off hydraulic fluid (risk of contamination).
Seal off line connections with special tool 32 1 270 .

Recycling

Catch and dispose of hydraulic fluid in a suitable expansion tank.

IMPORTANT: Pressure line and connections of hydraulic system must be provided with suitable seal plug 32 1 270 immediately after dismantling.

Necessary preliminary work

The time value for this job item does not include DRAWING OFF, EVACUATING AND FILLING THE HEATING AND AIR CONDITIONING SYSTEM
Remove air conditioning COMPRESSOR DRIVE BELT
Remove FRONT RIGHT WHEEL ARCH COVER
Remove STEERING ASSEMBLY COVER

NOTE: The following operations are required to improve accessibility to the compressor.

Release screw (1) on ARS/AFS return line (2).

Tightening torque 32 41 19AZ .

Unscrew nut (3).

Turn ARS and AFS return line (2) out of working area to one side.

Fig 1: Identifying Screw On ARS/AFS Return Line

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Unfasten screws (2).

Tightening torque 37 11 2AZ .

Carefully lower active stabilizer (3).

Fig 2: Identifying Lower Active Stabilizer Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Take off holder (2).

Take ARS expandable hose (3) out of working area and tie up.

Fig 3: Identifying ARS Expandable Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 37 13 11AZ .

Release screw (2) on holder.

Remove the ARS expandable hose (3) from the working area and tie it up.

Fig 4: Identifying ARS Expandable Hose And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Tie up ARS expandable hoses (1) as described in previous operations.

Cover cooling fins with aluminum sheet (2) or similar material.

This prevents the cooling fins from being damaged when the compressor is removed later.

Fig 5: Identifying Cooling Fins With Aluminum Sheet

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The following operations describe how to remove the heating and air conditioning system compressor.

For purposes of clarity, the compressor is shown without the surrounding assemblies!

Release screws (1).

Tightening torque 64 52 03AZ .

Fig 6: Identifying A/C System Compressor Screws

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.

Secure compressor (5) against falling out.

Release screws (1).

Tightening torque 64 52 03AZ .

Disconnect plug connection (2).

Lower compressor (5).

Release screws (3) and (4) and remove refrigerant lines.

Tightening torque 64 52 01AZ .

Installation note:

Replace sealing rings.

Fig 7: Identifying Compressor With Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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

Have another person pull the radiator forward.

Carefully feed out compressor upwards.

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!
Compliance with safety information is mandatory! 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
Check pipe connections for leaks
BLEED HYDRAULIC STEERING
START-UP with test run of Dynamic Drive