Expansion Valve: Service and Repair

64 51 525 Removing And Installing Or Replacing Expansion Valve

Special tools required:







WARNING:
Danger of injury.
Refrigerant circuit is under high pressure.
Avoid contact with refrigerant and refrigerant fluid.
Read and comply with safety information:
- Handling R 134a tetrafluorethane refrigerant
- Handling refrigerant fluid







IMPORTANT:
Risk of damage.
Restart engine only when air
conditioning system has been correctly filled.
Follow notes for opening and replacing parts in refrigerant circuit.
If air conditioning system is opened for more than 24 hours: Replacing desiccant insert for air conditioning system







Necessary preliminary work:
- Drawing off, evacuating and filling the heating and air conditioning system are not included in the time value given for this job item
- Remove sound insulation from bulkhead upper section







Feed out line penetration (1) towards top.







Release screws (1) and remove refrigerant lines (2) with associated seal.
Tightening torque 64 53 1AZ.

Installation note:
Replace sealing rings.

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







F02/F03 Automatic rear air-conditioning system only:
Release screw (1).
Tightening torque 64 53 7AZ. 00 00 Excerpt From Company Standard BMW GS 90003-2
Remove refrigerant line (2) with associated seal.

Installation note:
Replace sealing rings.
Use special tool 00 9 030 to install sealing rings without damaging them.







Unscrew nuts (1).
Tightening torque 64 53 9AZ.
Remove sealing plate (2) by manoeuvring upwards.







Feed out foam material (1).
Unfasten screws (2).
Tightening torque 64 53 2AZ.
Carefully remove flange (3) with expansion valve behind.

Installation note:
Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.
Flange (3) must be correctly seated on expansion valve.







After installation:
- Evacuate and fill A/C system