Coolant Mixture Ratio

WARNING: This page is about a different car, the 2024 Audi RS 3. However, it is still accessible from the selected car via links, so may be relevant.

Coolant (40%) and water (60%) for freeze protection -25 °C (-13 °F)
Coolant (50%) and water (50%) for freeze protection -35 °C (-31 °F)
Coolant. Refer to the Parts Information.

Coolant, Filling

Fig 1: Coolant, Filling

Courtesy of AUDI OF AMERICA, LLC

-- Fill the coolant reservoir of the Cooling System Charge Kit :VAS6096 with ten liters 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 -1-.

-- Mount 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 (101.53 to 145.04 psi) positive pressure.

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

Courtesy of AUDI OF AMERICA, LLC

The suction jet pump generates vacuum 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 coolant expansion tank.

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

Fig 2: Identifying Coolant Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- Close the coolant expansion tank cap until it locks into place.

Bleed Cooling System.

-- Install the air duct hose. Refer to OVERVIEW - CHARGE AIR HOSE CONNECTIONS .

-- Start the engine and bring to operating temperature.

Duration	Engine Speed	Conditions
2 Minutes	1500 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	1500 RPM	A/C system "OFF" Heater "HI"

-- Turn off the engine.

-- Install the noise insulation. Refer to OVERVIEW - NOISE INSULATION .