Coolant, Draining And Filling: Filling
- The ignition is off.
Only mix distilled water with coolant additives. Using distilled water provides optimum corrosion protection.
The water portion of the coolant influences the effectiveness of the coolant. Based on the contents, the country or even the region specific quality can be different. Use distilled water. For this reason, we recommend using distilled water when adding coolant or filling coolant for the first time.
Use only recommanded coolant additives. 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. 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 contributes to engine reliability under heavy loads, particularly in countries with tropical climates.
The RefractometerT10007A MUST be used to determine the freeze protection value.
Protection against frost must be assured down to approximately -25 °C (-13 °F) (in arctic climatic countries down to approximately -36 °C (-32.8 °F). When stronger freeze protection is needed due to the climate, the freeze protection may be increased. But only up to -48 °C (-54 °F), otherwise the effectiveness of the coolant decreases.
The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The frost protection must be at least -25 °C (-13 °F).
Read the freeze protection value on the scale for the coolant additive that has been added.
The temperature on the RefractometerT10007A corresponds to the >>freezing point<<. At this temperature, ice crystals may begin to form in the coolant.
Do not reuse used coolant.
Only use water/coolant additive to lubricate the coolant hoses.
-- Close the drain plug -1-.
Ignore item -2-.
-- Install the coolant hose on the engine oil cooler -arrow-.
-- Fill the coolant reservoir on the Cooling System Charge Kit VAS6096 with at least 12 liters (12.6 quarts) of premixed coolant with the proper mixture ratio.
- Coolant (40%) and distilled water (60%) for freeze protection down to -25 °C (-13 °F)
- Coolant (50%) and distilled water (50%) for freeze protection down to -36 °C (-32.8 °F
- For the correct coolant, refer to parts.
-- 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-.
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.
-- 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 the Cooling System Charge Kit VAS6096 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.
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.
-- Fill the coolant until the coolant system tester tube is full. Fill again during the bleeding procedure if necessary.
-- Remove the seal -3-.
-- Open the clips -1- and remove the plenum chamber cover -2-.
-- Pull back the coolant hose for the heater heat exchanger in order to loosen the hose clamp.
-- As soon as coolant starts to come out of the vent hole -arrow-, attach the coolant hose to the connection and tighten the clamp.
-- If the vehicle has a parking heater, switch it on for about 30 seconds.
-- Close the cap on the coolant reservoir until it locks into place.
-- Start the engine.
-- Set the temperature to "HI" for all zones and set the fan speed as low as possible (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 OVERVIEW - NOISE INSULATION .