64 51 520 Removing and installing or replacing expansion valve

WARNING: This page is about a different variant/trim than selected.

Notes

WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R 134a refrigerant. See 6450... SAFETY INSTRUCTIONS FOR HANDLING R134A REFRIGERANT or 6450... Instructions for handling refrigerant R 134a .
Avoid contact with refrigerant and refrigerant fluid.
Follow safety instructions for HANDLING REFRIGERANT FLUID .

IMPORTANT: Risk of damage!
Restart engine only when air conditioning system has been correctly filled.
Follow INSTRUCTIONS for opening and replacing parts in refrigerant circuit.

NOTE: If air conditioning system is opened for more than 24 hours: REPLACE desiccant insert for heating and air conditioning system.

Necessary preliminary work

Draw off REFRIGERANT FROM AIR CONDITIONING SYSTEM .
Remove INTAKE FILTER HOUSING .
N47 only: Remove right charge-air duct

Slacken nut (1).

Disconnect refrigerant lines (2).

Tightening torque 64 11 4AZ .

Installation note:

Replace sealing rings.

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

Fig 1: Identifying Refrigerant Lines With Mounting Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and screw in special tool 64 1 140 .

Release screw (2) and feed out expansion valve (3) towards front.

Tightening torque 64 11 5AZ .

Installation note:

Make sure expansion valve is correctly seated on seal.

Fig 2: Inserting Special Tool (64 1 140)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace all sealing rings on twin pipes (2).

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

Carefully insert expansion valve (1).

Grip mounting plate (3) with special tool 64 1 140 and secure expansion valve (1) with a screw.

Fig 3: Gripping Mounting Plate Using Special Tool (64 1 140)

Courtesy of BMW OF NORTH AMERICA, INC.