Procedures
Draining and Filling
Special tools, testers and auxiliary items required
• Refractometer (T10007)
• Drip Tray for VAS 6100 (VAS 6208)
• Hose Clip Pliers (VAS 6362)
• Cooling System Charge Unit (VAS 6096)
• Adapter (V.A.G 1274/8)
Draining
• Drained coolant must be stored in a clean container for disposal or reuse.
• Follow disposal regulations.
Hot steam may escape when opening the expansion tank cap. Wear protective goggles and protective clothing to prevent damage to eyes and scalding. Cover the cap with a cloth and open very carefully.
- Carefully open the coolant expansion tank cap.
- Remove the noise insulation.
- Disengage the quick acting coupling - arrow - and disconnect the lower coolant hose from the radiator.
- Also, remove the lower coolant hose - arrow - from the after run coolant pump and allow the remaining coolant to drain.
• Observe disposal regulations for coolant!
Filling
Do not 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. Volkswagen has decided to define the water quality used in the cooling system based on the different mixtures and 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 MY 10), distilled water is required.
• 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. 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 (-13 °F) (in arctic climatic countries down to approximately -35 °C (-31 °F)).
• 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 and cooling effect are reduced.
• Do not reuse the old coolant again if replacing the radiator, heater core, cylinder head or cylinder head gasket.
• The refractometer (T10007) is recommended for determining freeze protection density.
Recommended Mixture Ratios
• 1 The quantity of coolant can vary depending upon the vehicle equipment.
Procedure
- Connect the lower coolant hose - arrow - to the after run coolant pump again.
- Install the lower coolant hose to the radiator.
- Install the noise insulation.
- Install the adapter (V.A.G 1274/8) onto the expansion tank.
- Fill the coolant circuit using the cooling system charge unit (VAS 6096). Refer to the operating instructions for the cooling system charge unit.
The coolant system is under pressure when the engine is warm.
Risk of scalding due to hot steam and hot coolant.
Reduce pressure by covering the coolant expansion tank cap with a cloth and carefully opening.
- Check the coolant level and fill if necessary. With the engine at operating temperature, the coolant level must be at the top mark, with a cold engine, it must be in the center of the hatched area.
