Coolant: Service and Repair

Coolant, draining and filling

Special tools, equipment, test and inspection devices; required accessories





- VAG 1306 Drip tray for VAG 1202A





- VAG 1921 Hose clip pliers
- Hydrometer

Draining
- Open coolant recovery bottle cap.
- Remove damping pan.





- Unscrew drain plug -arrow- from radiator return to drain coolant from radiator.





- Also pull coolant hose out from oil cooler -arrow- to drain coolant from engine.

Note: Please follow regulations for disposal!

Refilling

Notes:
- To satisfy TL VW 774 D, only G 12 may be used as a coolant additive. Color coding: red.
- Never mix G 12 with any other coolant additives!
- If the liquid in the coolant recovery bottle is brown, this means that G 12 was mixed with another coolant and the coolant has to be changed.
- G 12 and additives which are labeled "satisfies TL VW 774 D" prevent damage from freezing and corrosion and prevent lime deposits. They also raise the boiling point For these reasons, the cooling system must be filled with antifreeze and anti-corrosion agents throughout the year.
- The coolant's higher boiling point will contribute to operational reliability under higher engine loads, especially in tropical climates.
- The antifreeze protection must go down to - 25° C (in Arctic climates down to -35°a C).
- The concentration of the coolant may not be reduced by topping up during the warm seasons or in warm countries. The proportion of additive must be at least 40%.
- If the climate requires stronger antifreeze protection, the portion of G 12 can be increased, but never above 60% (antifreeze protection down to about -40° C), otherwise the antifreeze protection will begin to decrease again and the cooling effect will be reduced.
- Do not reuse the same coolant if the radiator, heat exchanger, cylinder head or cylinder head gasket have been replaced.





Recommended mixing ratios

1) The amount of coolant may vary depending on the vehicle accessories.

- Tighten drain plug into radiator return.
- Push coolant hose onto oil cooler connection and pull it tight.





- Fill with coolant up to upper mark on cross hatched area on coolant recovery bottle.
- Close coolant recovery bottle.
- Expose heater controls and turn-off air conditioning if necessary.
- Start engine and run at approximately 2000 rpm for about 3 minutes.
- Keep engine running until fan starts.
- Check coolant level and fill as necessary.
The coolant level must be within the cross-hatched region when the engine is running warm. It must be above the lower mark if the motor is cold.