Drain
WARNING: When opening the expansion tank, hot steam may come out. Wear protective goggles and clothing to prevent eye injury and scalding. Cover the tank lid with a rag and carefully open it.
Open the cover of the expansion tank of the cooling system.
Remove soundproofing.
Unscrew a carving stopper, an arrow in drawing 2.243 from a radiator.
NOTE: Follow the rules for disposal of coolant.
Additionally, to drain the engine coolant, disconnect the coolant hoses from the thermostat housing (pic. 2.244).
Gulf
Only G 12 according to TL - VW 774 F can be used as coolant concentrate. Characteristic feature: lilac color.
G 12 and concentrates marked «according to TL - VW 774 F» prevent freezing of the coolant, the formation of corrosion and scale. In addition, they increase the boiling point of the coolant. Therefore, an anti-corrosion concentrate must work in the cooling system throughout the year to prevent freezing and corrosion.
Especially in countries with a tropical climate, at high engine loads, a coolant with a high boiling point reliably protects the engine during operation.
The freezing point of the coolant must be at least -25°C (in countries with an arctic climate - not less than -35°С).
It is also forbidden to reduce the proportion of concentrate in the coolant in the warm season or when operating in countries with a warm climate by adding water to the cooling system. The share of concentrate should be at least 40%.
If, due to climatic conditions, the freezing point must be lowered, the proportion of G 12 concentrate can be increased, but not more than 60% (freezing temperature in this case will be about -40°'C). If this limit is exceeded, the freezing point will rise again and, in addition, the heat capacity of the coolant will decrease.
When replacing the radiator, heater heat exchanger, cylinder head or cylinder head gasket, the drained coolant must not be reused.
To determine the freezing point of the coolant, it is recommended to use a T10007 refractometer.
NOTE: The amount of coolant to be filled may vary depending on the vehicle's equipment.
Recommended Mixing Ratios
Freezing point up to | Share of concentrate | G 12 | Water |
-25°C | 40% | 5.0 l | 8.0 l |
-35°C | 50% | 6.5 l | 6.5 l |
Work order
Install the cooling system hoses and secure them.
Screw the adapter for the cooling system tester VAG 1274/8 onto the expansion tank.
Top up the coolant using the cooling system filler VAS 6096.
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