Checking The Pressure Relief Valve In The Cap

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

-- Install the cap in the Cooling System Tester - Adapter:VAG1274/9 .

-- Clamp the Cooling System Tester Connecting Piece:VAG1274B/1 in the Cooling System Tester - Adapter:VAG1274/9 .

-- Connect the Adapter:VAG1274B/1 to the Cooling System Tester:VAG1274B using the hose provided.

Fig 1: Checking Pressure Relief Valve In Coolant Reservoir Cap

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Operate the hand pump.

The pressure release valve must open at 1.4 to 1.6 bar (20.30 to 23.20 psi).