BMW 7 Series: Removing And Installing/Replacing Heating And Air Conditioning System Compressor (N63, With Dynamic Drive)

Notes

WARNING: Danger of injury! Refrigerant circuit is under high pressure! Follow safety information for handling R134a tetrafluorethane refrigerant.

Avoid contact with refrigerant and refrigerant fluid.

Follow safety information HANDLING refrigerant fluid.

IMPORTANT: Risk of damage! Restart engine only when air conditioning system has been correctly filled.

If air conditioning system is opened for more than 24 hours: Replace DESICCANT INSERT FOR HEATING AND AIR CONDITIONING SYSTEM

WARNING: DANGER OF POISONING if oil is ingested/absorbed through the skin! DANGER OF INJURY if oil comes into contact with eyes and skin!

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.

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 plugs 32 1 270 immediately after dismantling.

Necessary preliminary work

• DRAWING OFF, EVACUATING AND FILLING THE HEATING AND AIR CONDITIONING SYSTEM are not included in the time value given for this job item
• 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. 208: Identifying ARS/AFS Return Line And Screw

Release screw (1).

Unfasten screws (2).

Tightening torque 37 11 2AZ.

Carefully lower active anti-roll bar (3).

Fig. 209: Identifying Lower Active Anti-Roll Bar And Screws

Slacken nut (1).

Take off holder (2).

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

Fig. 210: Identifying ARS Expandable Hose And Slacken Nut

Release screws (1).

Tightening torque 37 13 11AZ.

Release screw (2) on holder.

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

Fig. 211: Identifying ARS Expandable Hose And Screws

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

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

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

Fig. 212: Identifying ARS Expansion Hoses And Aluminium Sheet

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. 213: Identifying Compressor Screws

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.

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.

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

Fig. 214: Identifying Refrigerant Lines, Compressor And Screws

Have another person pull the radiator forward.

Carefully feed out compressor upwards.

After Installation note

• EVACUATE AND FILL HEATING AND AIR CONDITIONING SYSTEM
• Check line connections for tightness
• BLEED HYDRAULIC STEERING
• START-UP with test run of Dynamic Drive

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