Pressure Relief Valve in Cap, Checking
NOTE:
The shape of the cap can be different depending on the model year.
-- Install the cap -1- in the Cooling System Tester - Adapter: VAG1274/9 -2-.
-- Connect the Cooling System Tester - Adapter: VAG1274/9 to the Cooling System Tester: VAG1274B using the hose provided.
-- Generate pressure with cooling system tester hand pump.
Blue Cap
- The pressure release valve must open at 1.4 bar (20.31 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 opens prematurely:
-- Replace the cover.