Instructions for opening and part exchange in refrigerant circuit (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)

Required special tools:

WARNING:

Attention!

Always use new O-rings each time A/C connections are opened (refer to the applicable BMW Parts Catalog)
They must not be coated.

Use special tool 00 9 030 to install sealing rings without damaging them.
Open the refrigerant circuit for as short of a period as possible.
Close all components and lines in the refrigerant circuit and return parts immediately following the removals at openings with special tool 32 1 270 to prevent penetration of moisture or foreign objects.
If the refrigerant circuit was closed at the openings with special tool 32 1 270 but it remains open for more than 24 h, the dryer insert for the air conditioning must be replaced.

I. Part replacement as preliminary work fur further repair work and part replacement based on gradual leakage .

(minor leak, e.g. hairline crack)

Procedure:

Suction heating and AIR CONDITIONING SYSTEM , then determine suctioned coolant oil level
Carry out part replacement
Replace removed refrigerant oil and additionally top up with new refrigerant oil according to components replaced:
- Compressor: refer to NOTES on compressor replacement.
- Evaporator: 10 mL
- Air conditioning condenser: 20 mL
- Desiccant insert/dryer flask: 20 mL
- Each replaced refrigerant line: 10 mL
- Air conditioning condenser with integrated dryer flask : 40 mL
- Safety pressure switch and gasket: no additional refrigerant oil
- Only I01: Radiator, high-voltage battery unit: 20 mL
Evacuate and fill A/C SYSTEM .

II. Part replacement due to sudden leakage

(major leak, e.g. pipe break due to accident)

Procedure: