Cooling System: Testing and Inspection

Cooling system, checking for leaks

Special tools and equipment:

^ VAG 1274 Cooling system tester
^ Adapter VAG 1274/8
^ Adapter VAG 1274/9

Requirement
^ Engine warm.

WARNING: Hot steam can escape when cap on expansion tank is opened. Cover cap with cloth and open carefully.

- Open cap on coolant expansion tank.





- Install tester VAG 1274 with adapter VAG 1274/8 onto expansion tank.
- Use tester hand pump to generate pressure of approximately 1.0 bar.
- If there is a drop in pressure, locate leak and eliminate fault.

Checking pressure relief valve in cap





- Install tester VAG 1274 with adapter VAG 1274/9 onto cap.
- Operate hand pump.
^ Pressure relief valve must open at pressure of 1.4 to 1.6 bar.