Coolant: Service and Repair

Coolant, draining and refilling
Special tools and equipment





^ T10007 Refractometer
^ VAG1306 drip tray
^ VAG1331 torque wrench (5 to 50 Nm)
^ VAS5024 assembly tool for spring type clamps
^ VAG1274/8 adapter
^ VAG1274/10 adapter

Draining
- Open cap for coolant expansion tank.
- Remove noise insulation.





- Pull off retaining clip (arrow) for lower coolant hose and remove coolant hose from radiator.





- Disconnect coolant hose from connecting piece -2-.
- Remove bolts -1-, connecting piece -2-, O-ring -3- and coolant thermostat -4-.

Note: Follow coolant disposal regulations!

Filling

Notes:
^ Only use coolant additive G12 (according to TL VW 774 D). Characteristic: red color
^ Do not mix G12 with any other coolant additive!
^ If the fluid in expansion tank is brown, G12 has been mixed with other coolant. If this is the case, coolant must be replaced.
^ "G12" and coolant additives marked "In accordance with TL VW 774 D" prevent frost and corrosion damage, scaling and also raise the boiling point of the coolant. Therefore, cooling system must be filled year round with frost and corrosion protection additives.
^ A higher boiling point improves engine reliability under heavy load particularly in countries with tropical climates.
^ Frost protection additives protect against frost to about -25° C (about -35°C in arctic climates).
^ 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 greater frost protection required, the amount of G 12 can be increased, but only up to 60% (frost protection to about -40°C), otherwise frost protection and cooling effectiveness will be reduced.
^ If the radiator, heater core, cylinder head or cylinder head gasket is replaced, completely replace the engine coolant.





^ The T10007 refractometer is recommended for determining frost protection density.

Recommended mixture ratios:






1) The quantity of coolant can vary depending upon vehicle options.
2) Use only clean drinking water for mixing.

Procedure
- Install lower radiator hose and secure.
- Replace O-ring and remove coolant thermostat and connecting piece. Bracket of coolant thermostat must be vertical
Tightening torque: 15 Nm
- Attach coolant hose to connecting piece.





- Thread VAG1274/8 onto coolant reservoir and lengthen using 1274/10 tube
- Move back protective cover for coolant hose at connection of heater core.





- Loosen coolant hose on heater core and pull back hose sufficiently so that the bleed hole in coolant hose (arrow) is no longer covered by the connecting piece.
- Fill up coolant until it flows out of the coolant hose bleed hole.
- Slide coolant hose onto connecting piece and secure it again.
- Install coolant expansion tank cap.
- Start engine and maintain an engine speed of about 2000 RPM for approximately 3 minutes.
- Allow engine to idle until lower coolant hose at radiator is hot.
- Check coolant level and top off if necessary. With engine at operating temperature, coolant level must be at maximum marking, with engine cold, it must be between minimum and maximum marking.