Coolant, Draining And Filling
Special tools and workshop equipment required
- Cooling System Tester - AdapterVAG1274/8
- Shop Crane - Drip TrayVAS6208
- Hose Clamp PliersVAS 6362
- Cooling System Charge KitVAS6096
- RefractometerT10007A
Draining
Proceed as follows:
Collect escaping coolant in a clean container for disposal or reuse.
-- On a vehicle with air suspension, activate vehicle lift mode, refer to VEHICLE LIFT MODE .
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.
-- Remove the bolts and the front -1- and rear -2- noise insulation.
-- Place the Shop Crane - Drip TrayVAS6208 under the engine.
-- Remove coolant hose from front coolant pipe -arrow- and drain coolant.
Vehicles with 2-Zone Climate Control:
-- Detach the coolant hoses -1 and 2- to the heater heat exchanger from the plenum chamber bulkhead.
Vehicles with 4-Zone Climate Control:
-- Remove coolant hoses -arrows- from coolant pipes and drain remaining coolant.
Refer to COOLANT, DRAINING AND FILLING .
The water portion of the coolant influences the effectiveness of the coolant. Audi has decided to define the water quality used in the cooling system based on the different mixtures and country and regional requirements. Use distilled water. For this reason, we recommend using distilled water for older models when adding coolant or filling coolant for the first time.
Use only coolant additives listed in the Parts Catalog. Other coolant additives may above all reduce the corrosion protection effect significantly. The damage resulting from this may lead to loss of coolant and consequently to severe engine damage.
Coolant with the correct mixture ratio prevents freezing and corrosion damage and calcium deposits, refer to COOLANT, DRAINING AND FILLING . The boiling point will be raised. The cooling system must be filled with coolant additive year-round.
Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.
Freeze protection must be guaranteed down to approximately -25 °C (in arctic climatic countries down to approximately -36 °C).
The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The coolant additive portion must be at least 40 %.
If a lower freeze protection is necessary due to the climatic conditions, increase the amount of coolant additive. The maximum amount is 60%. If the amount is increased beyond that, the freeze protection will be reduced and cooling effect will be reduced.
RefractometerT10007A MUST be used to check the freeze protection in the engine coolant system with coolant generation "G13".
Read the freeze protection value on the scale for the coolant additive that has been added.
Do not reuse used coolant.
Secure all hose connections with hose clamps .
Refer to COOLANT, DRAINING AND FILLING .
- Coolant (40%) and water (60%) for freeze protection down to -25 °C
- Coolant (50 %) and water (50 %) for freeze protection down to -36 °C
- Coolant .
-- Attach coolant hose to front coolant pipe -arrow-.
Vehicles with 2-Zone Climate Control:
-- Connect the coolant hoses -1 and 2- to the heater heat exchanger at the plenum chamber bulkhead.
Vehicles with 4-Zone Climate Control:
-- Connect coolant hoses to coolant pipes -arrows-.
All Vehicles:
-- Fill the coolant reservoir on the Cooling System Charge KitVAS6096 with at least 12 liters of premixed coolant with the proper mixture ratio:, refer to COOLANT, DRAINING AND FILLING .
-- Attach the Cooling System Tester - AdapterVAG1274/8 to the coolant reservoir.
-- Install Cooling System Charge KitVAS6096 on Cooling System Tester - AdapterVAG1274/8.
-- Place air outlet -1- in a small container -2-.
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 hose -3- to compressed air.
- Pressure: 6 to 10 bar positive pressure.
-- Open valve -B- by turning level in direction of flow.
- 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 Cooling System Charge KitVAS6096 coolant reservoir fills with coolant.
-- Close valve -A- again.
-- Leave valve -B- open another 2 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.
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 KitVAS6096 coolant reservoir by pressure in the coolant system and the system is filled.
-- Remove the Cooling System Charge KitVAS6096 from the Cooling System Tester - AdapterVAG1274/8 on the coolant reservoir.
-- Close coolant reservoir cap.
-- Start the engine.
-- Adjust the temperature for all zones to "HI".
-- Press the ECON button to turn off the A/C compressor.
-- Run the engine at 2000 RPM for 3 minutes.
-- Allow engine to run at idle until both large coolant hoses on the main cooler are warm.
-- Run engine at 2000 RPM for 1 minute.
-- Turn off engine and allow it to cool off.
Refer to COOLANT, DRAINING AND FILLING .
- Coolant level must be at MAX-marking -arrow- with engine cold.
- Coolant level may be above MAX marking with engine at operating temperature.
-- On a vehicle with air suspension, deactivate vehicle lift mode, refer to VEHICLE LIFT MODE .