64 51 525 Removing and installing or replacing expansion valve

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. 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 .
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 replacing compressor.
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.
If A/C system is opened for more than 24 hours:

Replacing drier insert for A/C system. See REPLACING DESICCANT INSERT FOR A/C SYSTEM or REPLACING DESICCANT INSERT FOR A/C SYSTEM (CONDENSER REMOVED) .

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 FRESH AIR DUCT

Feed out rubber grommet (1).

Installation:

Make sure rubber grommet (1) is correctly seated.

Slacken nut (2).

Installation:

Tightening torque, 64 53 7AZ .

Detach refrigerant lines (3) and (4) in direction of arrow.

Installation:

Replace sealing rings and moisten with refrigerant oil.

Fig 1: Detaching Refrigerant Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Installation:

Tightening torque, 64 53 9AZ .

Detach expansion valve (2) in direction of arrow.

Installation:

Replace sealing rings and moisten with refrigerant oil.

Make sure soundproofing (3) is correctly seated.

Fig 2: Detaching Expansion Valve

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

EVACUATE AND FILL A/C SYSTEM