Pressure Relief Valve in Cap, Checking
WARNING: This page is about a different variant/trim than selected.
Cap, Version 1:
Cooling System Tester: VAG1274B
-- Generate approximately 2 bar (29 psi) pressure using the cooling system tester hand pump.
Blue Cap
- The pressure must lower to 1.6 to 1.4 bar (23.20 to 20.30 psi) and stay there.
-- If the pressure relief valve does not react as specified, replace the cap.
Black Cap
- The pressure must lower to 1.8 to 1.6 bar (26.1 to 23.2 psi) and stay there.
-- If the pressure relief valve does not react as specified, replace the cap.
Cap, Version 2:
Cooling System Tester: VAG1274B
-- Generate pressure with the cooling system tester hand pump.
Blue Cap
- The pressure release valve must open at 1.4 to 1.6 bar (20.30 to 23.20 psi).
Black Cap
- The pressure release valve must open at 1.6 to 1.8 bar (23.2 to 26.1 psi).
-- If pressure relief valve does not open as specified, replace the cap.