Cooling System, Checking For Leaks: Notes

WARNING: This page is about a different car, the 2018 Audi TT Quattro. 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

Procedure

Engine at operating temperature.

WARNING:

The cooling system is under pressure when the engine is warm. Risk of scalding due to hot steam and hot coolant.

Scalding the skin and other parts of the body is possible.

Wear safety gloves.
Wear protective eyewear.
Reduce the pressure by covering the coolant expansion tank cap with a cloth and carefully opening it.

-- Open the coolant reservoir cap -arrow-.

Fig 1: Identifying Coolant Reservoir Cap

Courtesy of AUDI OF AMERICA, LLC

-- Position the :VAG1274B with the :VAG1274/8 on the coolant expansion tank.

Fig 2: Cooling System Tester V.A.G 1274 Connected To Coolant Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- Generate approximately 1 bar (14.5 psi) pressure using the cooling system tester hand pump.

-- If the pressure falls, search for leaks and correct the malfunction.