Component Tests and General Diagnostics

Cooling System, Checking for Leaks

Special tools, testers and auxiliary items required

• Cooling system tester (VAG 1274)

• Adapter (VAG 1274/8)

• Adapter (VAG 1274/9)

- Install the cooling system tester (VAG 1274) with adapter (VAG 1274/8) onto coolant expansion tank.





- Operate pump and generate a positive pressure of 1.4 to 1.6 bar.

- Check cooling system for leaks.

- Also test the cap:

- To do this, install the adapter (VAG 1274/9) for the cooling system tester (VAG 1274) onto the cap.





- Operate pump and generate a positive pressure of max. 1.6 bar.

- Pressure relief valve in cap must not open yet.

- If valve opens early, replace cap.