Draining and Filling With Coolant

Draining and filling with coolant

Special tools and equipment






- 3094 Hose clamp
- VAG1274/8 Adapter
- VAG1274/10 Adapter
- VAG 1306 Drip tray
- VAG 1331 Torque wrench (5-50 Nm)
- Refractometer

Draining

- Open sealing cap on coolant expansion tank.
- Remove front sound insulation






- Pull out lower coolant hose retaining clip -arrow- and remove coolant hose from radiator.






- Drain coolant from engine using drain plug -arrow-.

Note: Observe disposal regulations for coolant!

Filling

Note:
- Only use coolant additive G 12 in accordance with TL VW 774 D. Identification: colored 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 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 antifreeze 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.

Work sequence

- Replace coolant drain plug O-ring and screw coolant drain plug into engine again.
Tightening torque: 20 Nm

- Install lower coolant hose and secure.






- Screw adapter VAG 1274/8 with adapter VAG1274/10 onto expansion tank.
- Loosen both bleeder screws on coolant hoses.






- Loosen coolant hose on heat exchanger and pull back hose sufficiently so that bleeder hole -arrow- is no longer sealed by connection.
- Top up coolant until it flows out of bleeder hole in coolant hose and bleeder screws on coolant hoses.
- Push coolant hose on connection and tighten.

- Screw bleeder screws tight on coolant hoses.
Tightening torque: 20 Nm

- Fit expansion tank cap.
- Switch off heater and air conditioner.
- Start engine and maintain an engine speed of about 2000 rpm for approximately 3 minutes.
- Allow engine to run at idling speed until lower hose on radiator becomes hot.
- Check coolant level and top-up if necessary. When engine is at normal operating temperature, coolant level must be on max. mark and between min. and max. marks when engine is cold.