Coolant, Draining And Filling
Special tools and workshop equipment required
- Cooling System Tester - AdapterVAG1274/8
- Cooling System Tester - AdapterVAG1274/10
- Cooling System Charge KitVAS6096
- Shop Crane - Drip TrayVAS6208
- Hose Clip PliersVAS6362
- RefractometerT10007A
Draining
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 front noise insulation. Refer to NOISE INSULATION .
-- Place the Shop Crane - Drip TrayVAS6208 under engine.
-- Remove the drain plug -1- and drain the coolant.
Ignore item -2-.
Vehicles with Transmission Fluid Heater
-- Loosen the hose clamps -1 and 2- and drain the coolant to remove the coolant hoses.
Filling
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 coolant additives listed in the Parts. 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 minimum -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 down 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.
Coolant 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)
- Coolant. Refer to the Parts.
-- Close the drain plug -1-.
Vehicles with Transmission Fluid Heater
-- Connect the coolant hoses with the hose clamps -1 and 2-.
Continuation for All Vehicles
-- Fill the Cooling System Charge KitVAS6096 with 10 liters (10.5 quarts) of coolant in the correct mixture ratio, mixture ratio. Refer to COOLANT, DRAINING AND FILLING .
-- Install the Cooling System Tester - AdapterVAG1274/8 on the coolant expansion tank.
-- Attach the Cooling System Charge KitVAS6096 on the adapter Cooling System Tester - AdapterVAG1274/8.
-- 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 KitVAS6096 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 KitVAS6096 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 - AdapterVAG1274/8 on coolant expansion tank.
-- Connect the Cooling System Tester - AdapterVAG1274/10 to the Cooling System Tester - AdapterVAG1274/8.
-- Remove the plenum chamber cover. Refer to Bulkhead .
-- Loosen the coolant hose to the heat exchanger and pull it back until the connection no longer covers the bleeder hole in the coolant hose -arrow-.
-- Fill with coolant until it escapes from the coolant hose bleeder hole.
-- 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.
-- Close coolant reservoir cap.
-- Start the engine.
-- Adjust the temperature for all zones to "HI".
-- 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 front noise insulation. Refer to NOISE INSULATION .
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.
-- Check the coolant level.
- Coolant level must be at "MAX" marking with engine cold.
- Coolant level may be above "MAX" marking with engine at operating temperature.