Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2007A3 BASE, AUTOMATIC DCTREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)GENERAL SERVICINGGENERAL, TECHNICAL DATA - REFRIGERANT R134A SERVICING (1 OF 2)GENERAL, TECHNICAL DATADESCRIPTION AND OPERATIONREFRIGERANT CIRCUITCONNECTIONS WITH SCHRADER VALVE
2007 Audi A3 Base, Automatic DCT
Connections With SCHRADER Valve
2007 Audi A3 Base, Automatic DCTSECTION Connections With SCHRADER Valve
- -A- Service connection (soldered in)
- -B- Valve insert (Schrader valve or needle valve)
- -C- O-ring (belonging to the valve)
- -D- Cap with seal
NOTE:
- After connecting, install the hand wheel for the service coupling 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 set -B- when the refrigerant circuit is evacuated, for example, use an adapter from the Socket for A/C valves T10364.
- Tighten the valve insert -B- very carefully because the tightening specification is very small.
- There are different versions of these valves, which means there are different tightening specifications. Valve insert -B- with a VG5 (5.2 x 0.7 mm, tire valve) thread has a tightening specification of 0.4 Nm +- 0.1 Nm; a valve insert with a M6 x 0.75 mm thread has a tightening specification of 0.9 Nm +- 0.1 Nm and a valve insert with a M8 x 1.0 mm thread has a tightening specification of 2.0 Nm +- 0.2 Nm.
- There are different versions of these valves, valve inserts and their caps. Be sure to use the correct version.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.