Radiator Cap: Testing and Inspection

Pressure Relief Valve in Cap, Checking

CAUTION! Hot steam may escape when opening expansion tank. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a rag and open very carefully.

- Open coolant reservoir cap.





- Place cooling system tester V.A.G 1274 with adapter V.A.G 1274/9 onto cap.
- Operate hand pump:
^ The pressure release valve must open at 1.4 to 1.6 bar.