Cooling System, Checking For Coolant Leaks: Procedure

WARNING: This page is about a different car, the 2013 Audi A8 and 2012 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

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 VAG 1274B with the Cooling System Tester - Adapter VAG 1274/8 on the coolant reservoir.

Fig 2: Cooling System Tester VAG 1274B

Courtesy of AUDI OF AMERICA, LLC

-- Generate approximately 1.0 bar (14.5 psi) pressure using the cooling system tester hand pump.

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