Coolant, Filling

• Used coolant cannot be used again.

-- Fill the coolant reservoir from the Cooling System Charge Kit: VAS6096  with 10 liters of coolant with the correct mixture ratio. Refer to Coolant Mixture Ratio  for the mixture ratio.

-- To make the filling procedure easier, position the coolant reservoir as high up as possible, for example on a workshop cart or the engine and gearbox jack.

-- Install the Cooling System Tester - Adapter: VAG1274/8  on the coolant expansion tank -1-.

-- Attach the Cooling System Charge Kit: VAS6096  on the Cooling System Tester - Adapter: VAG1274/8  .

-- Place the drain hose -2- in a small container -3-.

TIP:

A small amount of coolant which should be collected is drawn off with the discharged air.

-- Close the valves -A and B- by turning lever at a right angle to the flow direction.

-- Connect the hose -4- to compressed air.

• Pressure: 7 to 10 bar (101.52 to 145.03 psi) positive pressure.

-- Open the coolant circuit valves and select 01 - coolant circuit bleeding  in Guided Functions  using the Vehicle Diagnostic Tester.

-- Open the valve -B- by turning the lever in the flow direction.

Courtesy of AUDI OF AMERICA, LLC

• The suction jet pump generates pressure in the coolant system; indicator on display instrument must move into green area.

-- Briefly open the valve -A- by turning the lever in the flow direction so that the hose on the Cooling System Charge Kit: VAS6096  coolant reservoir fills with coolant.

-- Close the valve -A- again.

-- Leave the valve -B- open another two minutes.

• More pressure is generated in the coolant system by the suction jet pump; indicator on display instrument must stay in the green area.

-- Close the valve -B-.

• Needle in the display instrument must remain in the green region, then the sufficient vacuum in the cooling system is obtained for the upcoming filling.
• Repeat the procedure if the needle goes below the green range.
• Check the cooling system for leaks if the pressure drops.

-- Remove the pressure hose.

-- Open the valve -A-.

• Coolant is extracted from the Cooling System Charge Kit: VAS6096  coolant reservoir by pressure in the coolant system and the system is filled.

-- Remove the Cooling System Charge Kit: VAS6096  from the Cooling System Tester - Adapter: VAG1274/8  on the coolant expansion tank.

Bleed Cooling System 

-- Fill the coolant up to "max" marking.

-- If the vehicle has a parking heater, switch it on for about 30 seconds.

-- Start the engine.

Duration	Engine Speed	Conditions
Three minutes	2000 RPM	A/C system "OFF", the LED in the AC  button does not turn on Heater on "HI", blower speed as low as possible (= 0)
Until both large coolant hoses on the radiator are warm	Idle	A/C system "OFF" Heater "HI"
2 Minutes	2000 RPM	A/C system "OFF" Heater "HI"

-- Turn off the engine.