Pressure Relief Valve In Cap, Checking
WARNING: This page is about a different car, the 2016 Audi A3 and 2015 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
-- Position the :VAG1274B with the :VAG1274/9 on the cap.
-- Generate pressure with cooling system tester hand pump.
Blue Cap
- The pressure release valve must open at 1.4 to 1.6 bar (20.3 to 23.2 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 cap.