Pressure Relief Valve in Cap, Checking
WARNING: This page is about a different car, the 2023 Volkswagen Arteon. However, it is still accessible from the selected car via links, so may be relevant.
Requirement
- The Cooling System Tester:V.A.G 1274B has been checked for leaks.
CAUTION:
The cooling system may be under pressure. There is a risk of scalding due to hot steam and hot coolant.
Scalding the skin and other parts of the body is possible.
- Wear safety gloves.
- Wear protective eyewear.
- Reduce the pressure by covering the coolant expansion tank cap with a suitable towel and carefully opening it.
-- Open the cap -arrow-.
-- Connect the Cooling System Tester:V.A.G 1274B -1- and the Cooling System Tester - Adapter:V.A.G 1274/9 -2- with the cap -3-.
-- Operate the hand pump -1- several times to create pressure.
Requirement
- Blue cap: the pressure release valve must open at 1.4 to 1.6 bar (20.31 to 23.21 psi).
- Black cap: the pressure release valve must open at 1.6 to 1.8 bar (23.21 to 26.11 psi).
-- If pressure relief valve does not open as specified, replace the cap -3-.