Audi Workshop Service and Repair Manuals

Special tools, workshop equipment, test and measuring appliances and auxiliary items required

• ◆ T10007 Refractometer
• ◆ V.A.G 1306 Drip tray
• ◆ VAS 5024 Assembly tool for spring-type clamps

Draining

• ‒ Open cap on coolant expansion tank.
• ‒ Remove noise insulation tray:

=> General body repairs, exterior; Repair group 50; Front body; Noise insulation - Assembly overview

Vehicles with drive unit protection plate

• ‒ Removing drive unit protection plate:

=> General body repairs, exterior; Repair group 50; Front body; Noise insulation - Assembly overview

Continuation for all vehicles

• ‒ → To drain coolant from radiator remove drain plug -arrow-.

Note:

Observe disposal regulations!

Filling

Notes:

• ◆ Only use coolant additive G 12 in accordance with TL VW 774 D.
  Distinguishing feature: coloured red
• ◆ On no account must G 12 be mixed with other coolant additives!
• ◆ If the fluid in expansion tank is brown, G 12 has been mixed with another coolant. In this case the coolant must be changed.
• ◆ G 12 and coolant additives marked "In accordance with TL VW 774 D" prevent frost and corrosion damage, scaling and also raise boiling point of coolant. For this reason the system must be filled all year round with frost and corrosion protection additives.
• ◆ 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 countries with arctic climate 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 for climatic reasons a greater frost protection is required, the amount of G 12 can be increased, but only up to 60 % (frost protection to about -40 °C), as otherwise frost protection is reduced again and cooling effectiveness is also reduced.
• ◆ The refractometer T10007 is recommended for determining the current anti-freeze density.
• ◆ If radiator, heat exchanger, cylinder head or cylinder head gasket is replaced, do not reuse old coolant.

Recommended mixture ratios:

    1)    The quantity of coolant can vary depending upon the vehicle equipment.

• ‒ Screw drain plug into radiator and secure coolant hose on oil cooler connection.

• ‒ → Slowly fill expansion tank to upper marking of shaded field with coolant.
• ‒ Fit expansion tank cap.
• ‒ Switch off heater and air conditioning system.
• ‒ Start engine and maintain an engine speed of about 2000 rpm for approx. 3 minutes.
• ‒ Then allow engine to run at idling speed until the lower hose on radiator heats up and the radiator fan cuts-in.
• ‒ Switch off ignition.

• ‒ Check coolant level and top-up if necessary.

• When the engine is at normal operating temperature, the coolant level must be at the upper marking of the shaded field.
• When the engine is cold, the coolant level should be at approximately the middle of the shaded field.