64 51 525 Removing and installing/replacing expansion valve (N54)

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 9 030

WARNING: Follow safety instructions for handling REFRIGERANT R134A and safety instructions for handling REFRIGERANT OIL .

IMPORTANT:

Follow INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

Risk of damage!

Restart engine only when air conditioning system has been correctly filled.

Follow instructions for OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .

If air conditioning is opened for more than 24 hours:

Replace DESICCANT INSERT for heating and air conditioning system. Read all notes regarding desiccant insert replacement on this vehicle.

Necessary preliminary tasks:

Drain off AIR CONDITIONING SYSTEM

Lever out expanding rivets (1).

Unclip cable clip (2) on trailing links (3) towards top.

Fig 1: Identifying Trailing Links, Cable Clip And Expanding Rivets

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Release screws (1).

Tightening torque 64 53 2AZ .

Detach refrigerant lines (2) in direction of arrow and press slightly to one side.

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to install sealing rings without damaging them.

Fig 2: Identifying Refrigerant Lines With Mounting Screws

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Release screw (1).

Detach adapter plate (2) in direction of arrow.

Installation note:

Tightening torque 64 53 3AZ .

Make sure bulkhead grommet (3) is correctly seated in all-round groove of adapter plate (2).

Fig 3: Detaching Adapter Plate

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Release screws (1).

Installation note:

Tightening torque 64 53 4AZ .

Carefully detach bulkhead grommet (2) from bulkhead and fold down in direction of arrow.

Fig 4: Disconnecting Bulkhead Grommet From Grommet

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Detach expansion valve (1) in direction of arrow.

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to install sealing rings without damaging them.

Unclip frame (2) from bulkhead and insert in groove (3) of bulkhead grommet (4).

Make sure bulkhead grommet (4) is correctly seated.

Fig 5: Detaching Expansion Valve

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Evacuate and fill HEATING AND AIR CONDITIONING SYSTEM