Coolant Mixture Ratio
There is a risk of corrosion damage from an unsuitable mixture of water and coolant additive.
- For optimal corrosion protection distilled water must be used.
- 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 Information.
Procedure
- Used coolant cannot be used again.
-- Fill the coolant reservoir from the Cooling System Charge Kit: VAS6096 with 10 liters of coolant with the correct mixture ratio. Refer to Coolant Mixture Ratio for the mixture ratio.
-- To make the filling procedure easier, position the coolant reservoir as high up as possible, for example on a workshop cart or the engine and gearbox jack.
-- Install the Cooling System Tester - Adapter: VAG1274/8 on the coolant expansion tank -1-.
-- Attach 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 coolant circuit valves. Refer to Vehicle Diagnostic Tester 0001 - Engine Electronics Functions , 0001 - Coolant Circuit Bleeding Procedure .
-- Open the valve -B- by turning the lever in the flow direction.
- 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 and the Cooling System Tester - Adapter: VAG1274/8 from the coolant expansion tank.