Cooling System, Checking For Coolant Leaks: Notes

WARNING: This page is about a different car, the 2014 Audi A8 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 VAG 1274 B
Cooling System Tester - Adapter VAG 1274/8
Cooling System Tester - Adapter VAG 1274/9

Procedure

Fig 1: Engine At Operating Temperature

Courtesy of AUDI OF AMERICA, LLC

Engine at operating temperature.

WARNING:

Risk of scalding due to hot steam and hot coolant.

The coolant system is under pressure when the engine is warm.
Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening.

-- Remove the cap -arrow- from the coolant reservoir.

-- Position the Cooling System Tester V.A.G 1274 B with the adapter V.A.G 1274/8 on the coolant reservoir.

Fig 2: V.A.G 1274 B & V.A.G 1274/8

Courtesy of AUDI OF AMERICA, LLC

-- Generate approximately 1 bar pressure using the cooling system tester hand pump.

-- If pressure falls, search for leaks and correct problem.