Checking The Pressure Relief Valve In The Version 1 Cap

Courtesy of AUDI OF AMERICA, LLC

-- Position the :VAG1274B  with the :VAG1274B/15  on the cap.

Courtesy of AUDI OF AMERICA, LLC

-- Generate approximately 2 bar (29 psi) pressure using the cooling system tester hand pump.

Blue Cap: 

• The pressure must lower to 1.6 to 1.4 bar (23.20 to 20.30 psi) and stay there.

-- If the pressure relief valve does not react as specified, replace the cap.

Black Cap: 

• The pressure must lower to 1.8 to 1.6 bar (26.1 to 23.2 psi) and stay there.

-- If the pressure relief valve does not react as specified, replace the cap.