Coolant Mixture Ratio

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2017 Audi S5, 2016 Audi S5, 2016 Audi S4, 2015 Audi S5, and 2015 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

Coolant additive (40%) and water (60%) for freeze protection down to -25 °C (-13 °F)
Coolant additive (50%) and water (50%) for freeze protection down to -36 °C (-32.8 °F)

Procedure

Fig 1: Identifying Drain Plug

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-- Close the drain plug -1-.

-- Install the coolant hose on the engine oil cooler -arrow-.

Fig 2: Disconnecting Coolant Hose From Oil Cooler

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Vehicles with Left Front Coolant Pipes, Version 1

Fig 3: Identifying Hose Clamps -1 And 3- & Left Front Coolant Hose

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-- Install the coolant hoses -1 and 3- to the left front coolant pipes.

Vehicles with Left Front Coolant Pipes, Version 2

Fig 4: Locating Lower Coolant Pipe Bolt

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-- Attach the coolant hoses -arrows- to the left front coolant pipes.

Continuation for All Vehicles

Fig 5: Filling Coolant Reservoir Of Cooling System Charge Unit VAS 6096

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-- Fill the coolant reservoir on the Cooling System Charge Kit VAS6096 with 12 liters (12.6 quarts) of premixed coolant with the proper mixture ratio. (Refer to COOLANT MIXTURE RATIO)

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

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

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

NOTE:

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

-- 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) positive pressure.

-- Connect the Vehicle Diagnostic Tester to the vehicle.

-- Select the following menu items on the Vehicle Diagnostic Tester.

Guided Functions mode
01 - Simos Fuel Injection and Ignition
Functions - Engine
01 - Coolant circuit bleeding

-- Follow the instructions given in the Vehicle Diagnostic Tester.

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

Fig 6: Cooling System, Draining And Filling

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A further vacuum is created in the cooling system by the suction jet pump. Needle on the instrument display must travel into the green region.

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

-- Close valve -A- again.

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

A further vacuum is created in the cooling system by the suction jet pump. Needle on the instrument display must still remain in the green region.

-- 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.

NOTE:

If needle stands below the green area, repeat procedure.

If pressure falls, check coolant system for leaks.

-- Remove pressurized air hose.

-- Open 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 coolant expansion tank.

-- Connect the pipe Cooling System Tester - Adapter VAG1274/10 to the Cooling System Tester - Adapter VAG1274/8.

Fig 7: Identifying Special Tools - V.A.G 1274/10 & V.A.G 1274/8

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-- Fill with coolant until the coolant system tester tube is full. Fill again during the bleeding procedure if necessary.

-- Remove the rear engine cover -2- upward.

Fig 8: Identifying Engine Covers

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NOTE:

Use a cloth to catch any leaking coolant.

Fig 9: Bleeder Screws -1 And 2

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-- Open the bleeder screws -1 and 2- one after the other until coolant starts to come out.

-- Close the bleeder screw.

-- Remove the seal from the plenum chamber bulkhead.

Fig 10: Identifying Plenum Chamber Cover

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

-- 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.

Fig 11: Locating Heat Exchanger Bleeder Hole

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

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

-- Turn the coolant reservoir cap until it closes completely.

-- Start the engine.

-- Set the temperature to "HI" for all zones and set the fan speed (0).

-- Press the AC button to turn off the Air Conditioning (A/C) compressor.

The LED in the button must not come on.

-- Run the engine at 2000 RPM for 3 minutes.

-- Run the engine at idle until both large coolant hoses on the radiator are warm.

-- Run the engine at 2000 RPM for 2 minutes.

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

-- Install the noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .