Pressure Relief Valve In Cap, Checking

-- 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.

Fig 1: Checking Pressure Relief Valve In Coolant Reservoir Cap

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.