Pressure Relief Valve in Cap, Checking

WARNING: This page is about a different car, the 2017 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Pressure Relief Valve In Coolant Reservoir Cap

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Position the :VAG1274B with the :VAG1274/9 on the cap.

-- Generate pressure with the cooling system tester hand pump.

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.