64 51 520 Removing and Installing Or Replacing Expansion Valve

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. 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 . See 64 50... Instructions For Handling Refrigerant R134a and/or 64 50... Safety Instructions For Handling Refrigerant R134A .

Avoid contact with refrigerant and refrigerant oil.

Follow safety instructions for handling refrigerant oil . Refer to 64 50... 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! Refer to 64 52... 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 . Refer to 64 53 515 Replacing Desiccant Insert For A/C System .

Necessary preliminary tasks:

Drawing off, evacuating and filling the A/C system are not included in the time value given for this work operation. Refer to 64 50 009 Drawing Off, Evacuating And Filling A/C System (R134A) .
Remove lower section of microfilter housing . Refer to 64 31 081 Removing And Installing/Replacing Microfilter Housing (Upper 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, see 64 53 2AZ in 64 53 REFRIGERANT LINES AND EXPANSION VALVE .

Fig 1: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque, see 64 53 13AZ in 64 53 REFRIGERANT LINES AND EXPANSION VALVE .

Fig 2: Identifying Screws & Expansion Valve

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, Refrigerant Lines & Retainer

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Evacuate and fill A/C system . Refer to 64 50 009 Drawing Off, Evacuating And Filling A/C System (R134A) .