Coolant, Filling
Coolant, Filling
• The water portion of the coolant influences the effectiveness of the coolant. Volkswagen has decided to define the water quality used in the cooling system based on the different mixtures, country and regional requirements. For this reason, we recommend using distilled water for older models when adding coolant or filling coolant for the first time. On newer models (from Model Year (MY) 2010), distilled water is required.
Do not mix distilled water with coolant additives. Using distilled water provides optimum corrosion protection.
• Only use coolant additive G 12 plus-plus that conforms to TL VW 774 G.
• Use distilled water only.
• Coolant additives with the note "conforming to TL VW 774 G" prevent frost, corrosion damage and scaling. 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 down to approximately -25 °C (-13 °F) must be guaranteed. Freeze protection down to approximately -35 °C (-31 °F) in cold climate countries
• 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. Only up to 60% (freeze protection down to approximately -40 °C (-40 °F)). Otherwise the freeze protection is lessened and the cooling effect will be diminished.
• The refractometer (T10007) is recommended for determining freeze protection density.
• Do not reuse used coolant.
Recommended Mixture Ratios
• 1 The quantity of coolant can vary depending upon the vehicle equipment.
Special tools, testers and auxiliary items required
• Cooling System Charge Unit (VAS 6096)
• Adapter (V.A.G 1274/8)
- Make sure all connections are closed.
- Fill the coolant reservoir on the cooling system charge unit (VAS 6096) with at least 17 liters of premixed coolant with the proper mixture ratio:
- Install the adapter (V.A.G 1274/8) to coolant expansion tank.
- Install the cooling system charge unit (VAS 6096) to the adapter (V.A.G 1274/8).
- Place the 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 the lever at a right angle to the direction of flow.
- Connect the hose - 3 - to compressed air.
• Pressure: 6 to 10 bar pressure.
- Open the valve - B - by turning the lever in the direction of flow.
• A further vacuum is created in the cooling system by the suction jet pump. The needle on the instrument display must travel into the green region.
- Briefly open the valve - A - by turning the lever in the direction of flow so that the hose on the cooling system charge unit (VAS 6096) coolant reservoir fills with coolant.
- Close the valve - A - again.
- Leave the valve - B - open another 2 minutes.
• A further vacuum is created in the cooling system by the suction jet pump. the needle on the instrument display must still remain in the green region.
- Close the valve - B -.
• The needle on the display must remain in the green range. Only then is there enough vacuum in the coolant system for the filling.
• If the pressure falls, check the coolant system for leaks.
- Remove the compressed air hose.
- Open the valve - A - slowly.
• Coolant is extracted from the cooling system charge unit (VAS 6096) coolant reservoir by pressure in the coolant system and the system is filled.
- Remove the cooling system charge unit (VAS 6096) from the adapter (V.A.G 1274/8) on the coolant expansion tank.
- Check the coolant level in the expansion tank and drain or fill up to the MAX. mark, as necessary.
- Check the coolant concentration. Refer to => [ Fill Quality, Checking ] Fill Quality, Checking.