64 51 522 Removing and installing or replacing expansion valve

WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Draw off A/C system, then determine drawn-off refrigerant oil quantity, see 64 50 009 Drawing off, evacuating and filling A/C system (R 134a) .
Remove heater bulkhead, see 51 71 080 REMOVING AND INSTALLING/REPLACING HEATER BULKHEAD .

Fig 1: Locating Nut

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Unfasten nut.

Installation:

Tightening torque: 64 53 10AZ, see 64 11 HOUSING, HEATER/AIR CONDITIONER .

Fig 2: Locating Screws

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Unfasten screws.

Detach refrigerant lines in direction of arrow.

Installation:

Replace sealing rings.

Tightening torque: 64 53 2AZ, see 64 11 HOUSING, HEATER/AIR CONDITIONER .

If necessary, pull lock (1) in direction of arrow and feed out flap (2).

Fig 3: Pulling Lock

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Fig 4: Double Pipe

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Unscrew nut (1).

Installation:

Replace sealing rings.

Tightening torque: 64 53 11AZ, see 64 11 HOUSING, HEATER/AIR CONDITIONER .

Detach double pipe (2) in direction of arrow and lay to one side.

Fig 5: Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten screws.

Installation:

Replace sealing rings.

Tightening torque: 64 53 9AZ, see 64 11 HOUSING, HEATER/AIR CONDITIONER .

Pull out expansion valve in direction of arrow.