64 51 525 Removing And Installing/Replacing Expansion Valve (Automatic A/C High)

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant R 134a . See 64 50 ... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A .
Follow safety instructions for handling refrigerant oil . See 64 50 ... INSTRUCTIONS FOR HANDLING REFRIGERANT OIL (FOR REFRIGERANT R 134A) .

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

NOTE: If A/C system is opened for more than 24 hours:Replacing drier insert for A/C system . See 64 53 515 REPLACING DRIER INSERT FOR A/C SYSTEM (AUTOMATIC A/C BASIC) .

Necessary preliminary tasks:

Draw off refrigerant from A/C system . See 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) .
Remove trim panel for pedal assembly. See 51 45 185 REMOVING AND INSTALLING/REPLACING TRIM FOR PEDAL ASSEMBLY .

After installation:

Evacuate and fill A/C system . See 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) .

Release screw (1).

Remove left footwell air duct (2) in direction of arrow.

Installation:

Make sure left footwell air duct (2) is correctly seated.

Fig 1: Removing Left Footwell Air Duct

G04768952

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

If necessary, unclip plug connection.

Remove expansion valve cover (2) in direction of arrow.

Fig 2: Removing Expansion Valve Cover

G04768953

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Retaining hooks (1) must engage fully in mounts (2).

Fig 3: Identifying Retaining Hooks And Mounts

G04768954

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Detach refrigerant lines (2) in direction of arrow.

Remove plate (3).

Fig 4: Detaching Refrigerant Lines

G04768955

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Detach refrigerant lines (2) in direction of arrow.

Remove plate (3).

Remove expansion valve.

Fig 5: Detaching Refrigerant Lines

G04768956

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace all sealing rings (1).

Fig 6: Identifying Sealing Rings

G04768957

Courtesy of BMW OF NORTH AMERICA, INC.