64 51 520 Removing and Installing Or Replacing Expansion Valve

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. 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!

Handling R134a refrigerant: see SAFETY INSTRUCTIONS and INSTRUCTIONS FOR HANDLING .

Avoid contact with refrigerant and refrigerant oil.

Handling refrigerant oil: see safety instructions for HANDLING REFRIGERANT OIL (FOR REFRIGERANT R134A) .

IMPORTANT:

Risk of damage!

Restart engine only when A/C system has been correctly filled.

Follow INSTRUCTIONS FOR OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .

NOTE: If A/C system is opened for more than 24 hours: replace DESICCANT INSERT FOR A/C SYSTEM .

Necessary preliminary tasks:

Drain off refrigerant from A/C system. See DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R134A) .
Remove lower section of microfilter housing. Refer to REMOVING AND INSTALLING/REPLACING MICROFILTER HOUSING (LOWER SECTION) .

Release screws (1, 2), disconnect refrigerant lines and lay to one side.

Installation:

Replace all sealing rings and moisten with refrigerant oil.

Tightening torque 64 53 2AZ

Fig 1: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and remove expansion valve (2).

Tightening torque 64 53 13AZ

Fig 2: Identifying Expansion Valve With Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Place expansion valve (1) exactly on refrigerant lines (2) and (3).

Fit screws of expansion valve (1) and make sure retainer (4) is correctly positioned.

Fig 3: Identifying Expansion Valve & Retainer

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Evacuate and fill A/C system. Refer to DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R134A) .