Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

• ◆ Drip tray V.A.G 1306
• ◆ Hose clamp pliers
  V.A.G 1921
• ◆ Refractometer T10007

Draining

Note:

Collect drained coolant in a clean container for re use or disposal.

• ‒ Open the cover of the coolant expansion tank

• ‒ → Remove centre noise insulation -arrows-.

• ‒ Place drip tray V.A.G 1306 below engine.

Vehicles with drain plug:

• ‒ → Turn drain plug -1- on radiator anti-clockwise, fit auxiliary hose to connection if necessary.

Vehicles without drain plug:

• ‒ Pull off retaining clip -2- for bottom coolant hose and detach coolant hose from radiator.

All models:

• ‒ → Also disconnect lower coolant hose on oil cooler -arrow-, and drain off remaining coolant.

Filling

Notes:

• ◆ The cooling system is filled all year round with a mixture of water and antifreeze/corrosion protection agent.
• ◆ Only use coolant additive G 012 A8 D - meeting specification TL VW 774 D.
  Identification: red colour

• ◆ 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 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. and at the same time raise 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 approx. -25°C (in countries with an arctic climate to approx. -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.
• ◆ Only use clean drinking water to mix 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: 5.0 litres (may vary depending upon the vehicle equipment)

• ‒ → Turn drain plug -1- at radiator clockwise, or fit hose -2- at radiator.

• ‒ → Connect the coolant hose to the oil cooler -arrow-.

• ‒ → Top up coolant to max. mark on expansion tank.
• ‒ Start engine, allow to run at approx. 1500 rpm for max. 2 minutes, and at the same time fill with coolant up to overflow hole on the expansion tank.
• ‒ Fit expansion tank cap.
• ‒ Run engine until radiator fan cuts in.

• ‒ Check coolant level and top up if necessary. If the engine is warm, coolant level must be at max. mark; if cold, between min. and max. marks.
• ‒ Stop engine.