O-Ring Seals

Only O-rings that are resistant to refrigerant R134a and refrigerant oil must be installed. Color coding of O-rings is no longer employed. Colored and black O-rings are used.
Ensure inner diameter on seals used is correct.

Refer to [For engine(s) BLV, CCTA, CBFA] Removal and Installation .

The O-rings may be used one time only.
Before installing O-rings, coat lightly with refrigerant oil (PAG oil).

NOTE:

When flushing components with compressed air and nitrogen, always extract the gas mixture escaping from the components with suitable extraction units (workshop extraction system).

After engine all service work, screw sealing caps (with seals) onto all connections with valve and service connections.

Before starting up A/C system. Observe vehicle specific filling capacities. Refer to Maintenance, Diagnosis .

Do not fill refrigerant, extract refrigerant present and refill the system.