BMW 7 Series: Pressure Line From Connecting Piece To Rear Heater - A/C System

Notes

WARNING: Risk of injury! Refrigerant circuit is under high pressure! Follow safety instructions for handling R 134A refrigerant.

Avoid contact with refrigerant and refrigerant oil.

Follow safety instructions for handling REFRIGERANT OIL.

IMPORTANT: Observe SAFETY INSTRUCTIONS for raising the vehicle.

Risk of damage! Restart engine only when A/C system has been correctly filled.

Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.

If A/C system is opened for more than 24 hours:

Replace desiccant insert for A/C system.

To ensure that the refrigerant is almost completely drained from the rear air conditioner:

In the diagnosis system under Service functions carry out the instruction for "Draining/filling refrigerant circuit".

Necessary preliminary tasks

• DRAWING OFF, EVACUATING AND FILLING THE A/C SYSTEM are not included in the time value given for this work operation
• Remove ENTIRE EXHAUST SYSTEM
• Remove heat shield at rear.
• Remove UNDERBODY PANELLING

Slacken nut (1).

Take off holder (2).

Fig. 224: Identifying Slacken Nut

IMPORTANT: Secure rear axle support against falling out.

Slacken screws (1) on right compression strut (2), do not unscrew fully.

Tightening torque 33 33 2AZ.

Slacken screw (3) (do not unscrew fully).

Tightening torque 33 33 1AZ.

Fig. 225: Identifying Right Compression Strut And Slacken Screws

Slacken screws (1) on rear axle support at rear right (2), do not unscrew fully.

Tightening torque 33 33 1AZ.

Gently lower rear axle at rear right to make it easier to feed out refrigerant lines later.

Fig. 226: Identifying Rear Axle Support And Slacken Screws

Unlock and open respective clamp (1).

Fig. 227: Identifying Respective Clamp

Release screw (1).

Disconnect pressure line (2) from pressure line (3).

Installation: Replace sealing rings.

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

Fig. 228: Identifying Pressure Line And Screw

Unclip pressure line (1) from holder (2).

Fig. 229: Identifying Pressure Line And Holder

Release corresponding screw (1).

Tightening torque 64 53 5AZ.

Carefully detach respective refrigerant line (3) downwards from expansion valve (2).

Installation: Replace sealing rings.

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

Fig. 230: Identifying Respective Refrigerant Line And Expansion Valve

Unlock and open respective clamp (1).

Feed out corresponding refrigerant line (2) between vehicle underbody and rear axle support (3).

Fig. 231: Identifying Corresponding Refrigerant Line And Rear Axle Support

After installation

• Evacuate and fill A/C SYSTEM

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