Coolant, Draining And Filling: Procedure

Audi S6/S7: 

-- Connect the coolant hose and clamp -1- to the left lower coolant pipe.

-- Close the drain plug -2-.

Fig 1: Identifying Drain Plug And Clamp

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Audi RS6/RS7: 

-- Install the coolant hose and clamp -4-.

Fig 2: Identifying Nut And Clamp

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-- Install the coolant hose and connector coupling -1-, refer to Figure.

Fig 3: Identifying Clamp

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Continuation for All Vehicles: 

Fig 4: Filling Coolant Reservoir Of Cooling System Charge Unit VAS 6096

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-- Fill the coolant reservoir on the Cooling System Charge Kit VAS 6096 with at least 15 liters (3.96 gallons) of premixed coolant with the proper mixture ratio.

-- Install the Cooling System Tester - Adapter VAG 1274/8 on the coolant expansion tank.

-- Attach the Cooling System Charge Kit VAS 6096 on the Cooling System Tester - Adapter VAG 1274/8.

-- Place the air outlet hose -1- in a small container -2-.

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

-- Connect the hose -3- to compressed air.

• Pressure: 6 to 10 bar (87 to 145 psi) pressure.

-- Open valve -B- by turning level in direction of flow.

Fig 5: Cooling System, Draining And Filling

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

-- Briefly open valve -A- by turning lever in direction of flow so that hose on the Cooling System Charge Kit VAS 6096 coolant reservoir fills with coolant.

-- Close valve -A- again.

-- Leave 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 green area.

-- Close 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.

-- Remove pressurized air hose.

-- Open valve -A-.

• Coolant is extracted from the Cooling System Charge Kit VAS 6096 coolant reservoir by pressure in the coolant system and the system is filled.

-- Remove the Cooling System Charge Kit VAS 6096 from the adapter VAG 1274/8 on coolant expansion tank.

-- Connect the pipe Cooling System Tester - Adapter VAG 1274/10 to the adapter Cooling System Tester - Adapter VAG 1274/8.

Fig 6: Identifying Cooling System Tester - Adapter

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-- Remove the plenum chamber cover, refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

NOTE:

Use a cloth to catch any leaking coolant.

Fig 7: Identifying Bleed Hole

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-- Disconnect the heat exchanger coolant hose and pull it back until coolant starts to drain out of the bleed hole -arrow- in the coolant hose.

-- Slide the coolant hose onto the connection and secure with a clamp.

Audi S6/S7: 

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

Audi RS6/RS7: 

Fig 8: Identifying Bleed Screw

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-- Remove the lock carrier cover, refer to LOCK CARRIER COVER, REMOVING AND INSTALLING .

-- Open the bleed screw -arrow-.

-- Fill the coolant until it escapes from the coolant hose bleeder hole.

-- Close the bleeder screw.

Continuation for All Vehicles: 

Fig 9: Identifying Coolant Reservoir Cap

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-- Close the cap -arrow- on the coolant reservoir until it locks.

-- Start the engine.

-- Turn off engine and allow it to cool off.

-- Install the lock carrier cover, refer to LOCK CARRIER COVER, REMOVING AND INSTALLING .

-- Install the plenum chamber cover, refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .