Refrigerant Circuit, General Precautions: O-Ring

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

Only O-rings that are resistant to refrigerant R134a and the associated refrigerant oil may be used. 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 REFRIGERANT CIRCUIT / A/C COMPRESSOR .

O-rings may only be used once.
Before installing, coat the O-rings 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. Pay attention to the vehicle-specific filling capacities. Refer to MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2011) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2012) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2013) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2014) .

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