Refrigerant Circuit Quick-Release Connections

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Only valves and connections resistant to R134a refrigerant and the related refrigerant oils are to be used.

There are different connections (OD) for high and low pressure sides.

Discharge refrigerant circuit before removing valves or valve inserts.

Always screw on sealing caps.

Arrangement in vehicle → 87 - Air conditioning

Fig 1: Identifying A/C Service Connection Components

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connections with Schrader Valve

A - Service connection (soldered in)

B - Schrader valve insert

C - O-ring (for valve)

D - Cap with seal

Connections with Primary Sealing Valve

CAUTION: Before unscrewing connection, connect A/C service station and extract refrigerant. Refrigerant circuit must be empty to avoid possible injury.

Fig 2: Identifying High Pressure Service Valve Components

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connection with High-Pressure Valve

Socket with external or internal thread
O-ring: 10.8 mm; 1.8 mm, identification: black or colored
Valve with groove for O-ring and external or internal thread M 8x1 for cap
O-ring for cap: 10.8 mm; 1.8 mm, identification: black or colored
Cap

Fig 3: Identifying High Pressure Service Valve Components

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connection with Low-Pressure Valve

Socket with external thread and groove for O-ring
O-ring: 7.6 mm; 1.8 mm, identification: black or colored
Valve internal thread for cap M 8x1
O-ring for cap: 7.6 mm; 1.8 mm, identification: black or colored
Cap