Pressure Relief Valve In Cap, Checking

Courtesy of AUDI OF AMERICA, LLC

-- 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.