Engine Coolant System, Checking For Leaks, Low Temperature: Notes

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.

Special Tools And Workshop Equipment Required

Cooling System Tester:VAG1274B
Cooling System Tester - Adapter:VAG1274/8
Cooling System Tester - Adapter:VAG1274/9

Test Conditions

Engine at operating temperature

Test Sequence:

WARNING:

Steam can be released when the cap is removed from the expansion tank. Cover cap with a cloth and open carefully.

-- Open the coolant reservoir cap.

-- Install the Cooling System Tester - Adapter:VAG1274/8 in the coolant expansion tank.

Fig 1: Cooling System Tester V.A.G 1274 Connected To Coolant Reservoir

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Place the Adapter:VAG1274B/1 on the Cooling System Tester - Adapter:VAG1274/8 .

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

-- Generate approximately 1.5 bar (21.75 psi) pressure with cooling system tester hand pump.

The pressure must not drop more than 0.2 bar (2.9 psi) within 10 minutes.

-- If the pressure falls more than 0.2 bar (2.9 psi), search for leaks and correct the problem.

NOTE:

The pressure decrease of 0.2 bar (2.9 psi) within 10 minutes is a condition of the cooling of the coolant. The colder the engine the more the pressure decrease. If necessary repeat the test with the engine cold.

CAUTION:

Risk of scalding! The existing pressure must be reduced before disconnecting the Cooling System Tester:VAG1274B from the connecting hose or the Adapter:VAG1274B/1 . To do this, press the pressure release valve on the Cooling System Tester:VAG1274B until the pressure gauge displays >>0<<.