Cooling System, Draining and Filling
Cooling system, draining and filling
Special tools and equipment
^ Adapter 1274/8
^ Pipe V.A.G 1274/10
^ Drip tray V.A.G 1306
^ Hose clamp pliers V.A.G 1921
^ Special tool T10007
Draining
Note: Catch drained off coolant in a clean container for re-use or disposal.
WARNING! Hot steam can escape when opening the cap on the expansion tank: Cover the cap with a cloth and open carefully.
^ Open cover of coolant expansion tank
^ Remove sound insulation -arrows-.
^ Place drip tray V.A.G 1306 below engine.
^ Remove lower coolant hose retaining clip - arrow- and remove coolant hose from radiator.
Note: With bumper and air duct in front of charge air cooler removed, the coolant can also be drained from the radiator via the drain screw -arrow, If necessary use an auxiliary hose.
^ Disconnect lower coolant hose on oil cooler - arrow-, and drain off remaining coolant.
Filling
Note:
^ The cooling system is filled all year round with a mixture of water and an antifreeze/corrosion protection agent.
^ Only use coolant additive G 012 A 8 D meeting specification TLVW 774 D. Identification color: red
CAUTION! G012 A8D and other coolant additives cannot be mixed. Otherwise, serious damage to the engine may result.
^ If the fluid in the expansion tank is brown, this means G 012 A8D has been mixed with another type of coolant. In this case, flush out the cooling system and fill with fresh coolant. To flush the system, fill it with clean water and run the engine for about 2 minutes. This should remove as much of the old coolant as possible.
^ G 012 A8 D and coolant additives marked "meeting specification TL VW 774 D" prevent frost and corrosion damage and stop scaling while at the same time raising the boiling point of the 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.
^ Protection against frost must be assured to about -25°C (in arctic climatic countries 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). Otherwise, frost protection is reduced again and cooling effectiveness is also reduced.
^ Only use clean drinking water for mixing the coolant.
^ If radiator, heat exchanger, cylinder head or cylinder head gasket is replaced, do not reuse old coolant.
^ Use special tool T10007 to check frost protection of coolant additive G012 A8 D in cooling system.
Recommended mixture ratios:
1) Coolant quantity: 7.0 liters (may vary depending upon the vehicle equipment)
^ Install lower coolant hose and secure.
^ Screw adapter VAG 1274/8 onto coolant expansion tank.
^ Fit special tool VAG 1274/10 onto adapter.
Note: To fill expansion tank without special tools, remove expansion tank and temporarily raise it about 100 mm.
^ Remove seal from plenum chamber cover in direction of arrow.
^ Remove plenum chamber cover -1- from front.
^ Push back protective cover for coolant hose at connection of heat exchanger.
^ Release coolant hose to heat exchanger and pull back hose until bleeder hole in coolant hose -arrow- is no longer covered by connection.
^ Top up coolant until it flows out at bleeder hole in coolant hose.
^ Push coolant hose on connection and tighten.
^ Install expansion tank cap.
^ Start engine and maintain an engine speed of about 2000 rpm for approximately 3 minutes.
^ Allow engine to run at idling speed until lower hose on radiator becomes hot.
WARNING! Hot steam can escape when opening the cap on the expansion tank: Cover cap with a cloth and open carefully.
^ Check coolant level and top up if necessary. If engine is warm, coolant level must be at maximum mark; if cold, between minimum and maximum marks.
^ Stop engine.