Draining and Filling

Cooling system, draining and filling





Special tools and equipment
^ T10007 Refractometer
^ V.A.G. 1306 Drip tray
^ VAS 5024 Assembly tool for spring-type clips

Draining

WARNING! Steam can be released when removing the cap from the expansion tank, cover cap with a cloth and open carefully.

^ Open cap on coolant expansion tank.
^ Remove sound insulation tray:





^ Remove drain plug (arrow) to drain coolant from radiator.





^ To drain coolant from engine also remove coolant hose from oil cooler (arrow).

Note: Observe waste disposal regulations!

Filling

Note:
^ Only use coolant additive G 12 in accordance with TL VW 774 D. Distinguishing features: Colored red
^ Combine G 12 coolant additive with only with clean drinking water for the cooling system.
^ Under no circumstances must G 12 be mixed with other coolant additives!
^ If the fluid in expansion tank is brown, G 12 has been mixed with other 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 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 for climatic reasons a higher anti-freeze is required, the amount of G 12 can be increased, but only up to 60 % (anti-freeze to about -40°C), as otherwise anti-freeze 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:

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





^ Fill with coolant up to MAXIMUM mark on expansion tank.
^ Install expansion tank cap.
^ Start engine and maintain an engine speed of about 2000 rpm for approximately 3 minutes.
^ Run engine until coolant fan starts.

WARNING! Steam can be released when removing the cap from the expansion tank, cover cap with a cloth and open carefully.

^ Check coolant level and top-up if necessary. When engine is at normal operating temperature, coolant level must be on MAXIMUM mark, when engine is cold, between MINIMUM and MAXIMUM mark.