Cooling System: Testing and Inspection

Cooling System, Checking for Leaks

Special tools, testers and auxiliary items required

• Cooling system tester (V.A.G 1274)

• Adapter (V.A.G 1274/8)

• Adapter (V.A.G 1274/9)

- Install cooling system tester (V.A.G 1274) with adapter (V.A.G 1274/8) on 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 adapter (V.A.G 1274/9) of cooling system tester (V.A.G 1274) onto 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.