Cooling System, Draining and Filling

Cooling system, draining and filling
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required





^ VAG 1306 Drip tray





^ VAG 1921 Spring clip pliers
^ Anti-freeze tester

Cooling system, draining
- Open cap on coolant expansion tank.
- Remove center insulation tray
=>General body repairs





- Unscrew radiator drain plug to drain engine coolant -arrow-





- To drain coolant from engine also remove coolant hose from oil cooler -arrow-.

Note:
Observe proper disposal regulations!

Cooling system, filling

Notes:
^ Only use G 12 coolant additive. Identification: red color
^ On no account must G 12 be mixed with any other coolant additives!
^ If the fluid in expansion tank is brown; G 12 has been mixed with another coolant. Drain the system and replace with fresh engine coolant.
^ G 12 prevents frost and corrosion damage, scaling and also raises the boiling point of the engine coolant.
For this reason, the system must be filled year round with frost and corrosion protection additives.
^ In some countries, particularly those with tropical climates, the higher boiling point of the coolant will improve engine reliability when it is heavily loaded.
^ Protects against freezing to approx. -25°C (approx. -35°C in arctic climates).
^ Do NOT reduce the coolant concentration by adding water even in warmer seasons in warm countries. The anti-freeze ratio must be 40 % minimum.
^ If for climatic reasons, greater frost protection is required, the G 12 concentration can be increased but only up to 60 % maximum (freeze protection to approx. -40°C, otherwise, freeze protection as well as cooling effectiveness will be reduced.
^ If the radiator heat exchanger cylinder head or cylinder headgasket is replaced, you must replace the entire engine coolant with new coolant.





Recommended mixture ratios:
- Screw in engine coolant drain plug.





- Fill expansion tank with coolant up to Max. mark.
- Install expansion tank cap.
- Run engine until radiator fan comes on at least once.
- Check coolant level and top-up if necessary.
^ When engine is at normal operating temperature, coolant level must be on Max. mark,
When engine is cold; between Min. and Max. marks.