Cooling system, draining and filling: Filling

• If the fluid in the expansion tank is brown, this means G 012 A8 D has been mixed with another type of coolant. In this case, flush out the cooling system and put in fresh coolant. To flush the system, fill it with clean water and run the engine for about 2 minutes. This should remove very nearly all of the old coolant.
• G 012 A8 D and coolant additives marked "meeting specification TL VW 774 D" prevent frost and corrosion damage, stop scaling and at the same time raise the boiling point of coolant. For these reasons the cooling system must be filled all year round with the correct anti-freeze and anti-corrosion additive.
• Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.
• Frost protection is required down to about -25° C (in countries with arctic climates down to about -35° C).

• The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The anti-freeze ratio must be at least 40%.
• If greater frost protection is required in very cold climates, the amount of G 012 A8 D can be increased, but only up to 60% (this gives frost protection to about -40° C), as otherwise frost protection is reduced again and cooling effectiveness is also reduced.
• If radiator, heat exchanger, cylinder head or cylinder head gasket is replaced, do not reuse old coolant.

Recommended mixture ratios:

1) Coolant quantity: 5.0 liters (may vary depending upon the vehicle equipment)

• Screw in coolant drain plug.

Fig 1: Identifying Expansion Tank

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• Top off coolant to max. mark on expansion tank.
• Start engine and run at approx. 1500 RPM for max. 2 minutes and at the same time fill with coolant up to over-flow hole on expansion tank.
• Install expansion tank cap.
• Run engine until radiator fan cuts in.

• Stop engine.
• Check coolant level and top off, if necessary. When the engine is at normal operating temperature, the coolant level must be on the max. mark, when the engine is cold, between the min. and max. marks.