Cooling System, Checking For Coolant Leaks: Notes

WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, and 2010 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Cooling System Tester V.A.G 1274 B
Adapter V.A.G 1274/8
Adapter V.A.G 1274/9

Procedure

Fig 1: Identifying Coolant Reservoir Marking

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.

-- Open the coolant reservoir cap.

-- Position V.A.G 1274 B with V.A.G 1274/8 on coolant reservoir.

Fig 2: Identifying 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.