Cooling System: Testing and Inspection

Pressure test
- Engine at operating temperature

WARNING: The cooling system is pressurized when the engine is warm. When opening the expansion tank, wear gloves and other appropriate protection, cover the cap with a cloth and open carefully to relieve system pressure slowly.

- Open cap on coolant expansion tank.





- Using VAG1274/8 adapter attach VAG1274 cooling system tester to coolant expansion tank.
- Use tester hand pump to create a pressure of approximately 1.0 bar (14.5 psi).
- If pressure falls, check for leaks and repair.