Service Connection Measurements

WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Valve insert -A- (different versions)

Courtesy of AUDI OF AMERICA, LLC
Service connection -B- (depending on the refrigerant, there are different versions on the high and low pressure side)

Service Connection Measurements -B-	Refrigerant R134a Service Connection		Refrigerant R1234yf Service Connection
Service Connection Measurements -B-	High-Pressure Side	Low-Pressure Side	High-Pressure Side	Low-Pressure Side
Outer diameter -D1-	16.0 mm	13.0 mm	17.0 mm	14.0 mm
Outer diameter -D2-	14.0 mm	11.0 mm	13.0 mm	12.0 mm
Section -L1-	4.6 mm	6.15 mm	9.0 mm	4.75 mm
Section -L2-	8.16 mm	9.16 mm	12.5 mm	7.2 mm
Valve installation position (not actuated) -C-	6.1 to 7.1 mm	6.1 to 7.1 mm	8.3 to 9.3 mm	8.3 to 9.3 mm

Service Connections with Primary Sealing Valve (Ball Valve)

This type of service connections is currently not used on VW/Audi refrigerant circuits.
Only valves and connections that are resistant to refrigerant R1234yf and refrigerant oil must be installed.
The service connections on a R1234yf refrigerant circuit are designed so that the service connections from a R134a refrigerant circuit designed service couplings cannot be connected.
There are different connections (outer diameter) for the high pressure and low pressure sides.
Discharge the refrigerant circuit before removing valves or valve inserts.
Always install the closure caps with a seal.

Allocation in the vehicle. Refer to Refrigerant Circuit (vehicle-specific service information).

Connection with High-Pressure Valve

Fig 1: Exploded View Of Connection With High-Pressure Valve

Courtesy of AUDI OF AMERICA, LLC

Socket with internal thread (soldered in)
Seal (version and identification: black or colored. Refer to the Parts Information)
Valve with an external thread and groove for the seal (identification: ball valve)
Closure Cap Seal
Closure Cap

NOTE:

After connecting, carefully install the service coupling hand wheel just far enough into the quick-release coupling adapter until the valve is securely opened inside the service connection (pay attention to the pressure gauge, do not put too much pressure on the valve).

For removing and installing the valve -3- when the refrigerant circuit is discharged, for example, use an adapter from the Refrigerant Sockets:T10364 .

There are different versions of these valves (with internal or external threads). Therefore the tightening specifications may also differ. The currently used valves -3- with an M12 x 1.5 mm external thread have a tightening specification of 9 Nm ±1 Nm.

There are different versions of these valves and their caps. Make sure the valve version and the closure cap allocation are correct. Refer to the Parts Information.

Connection with Low-Pressure Valve

Fig 2: Exploded View Of Connection With Low-Pressure Valve

Courtesy of AUDI OF AMERICA, LLC

Socket with an External Thread and Groove for Seal (soldered in)
Seal (version and identification: black or colored. Refer to the Parts Information)
Valve with Internal Thread
Closure Cap Seal
Closure Cap

NOTE:

Carefully install the service coupling hand wheel just far enough into the quick-release coupling adapter until the valve is securely opened in the service connection (pay attention to the pressure gauge, do not put too much pressure on the valve).

For removing and installing the valve -3- when the refrigerant circuit is discharged, for example, use an adapter from the Refrigerant Sockets:T10364 .

There are different versions of these valves (with internal or external threads). Therefore the tightening specifications may also differ. The currently used valves -3- with an M10 x 1.25 mm inner thread have a tightening specification of 9 Nm ±1 Nm.

There are different versions of these valves and their caps. Make sure the valve version and the closure cap allocation are correct. Refer to the Parts Information.