[Blink]

Originally Posted by T-Cut

You need to do it by the official MGR bleeding proceedure, which is given in RAVE and the Haynes Manual:

1. Remove the bleed screw in the hose located between the engine and air filter.
2. Detach the (narrow) hose from the side of the header tank filler neck.
3. Remove the bolt securing the header tank to the radiator top and swing the tank backwards so you can unhook the side mounting pegs.
4. Lift the header tank as high as it will go (about 5 inches), ensuring none of the plastic hoses are kinked.
5.Slowly fill the cooling system, keeping the header tank full to just under the neck, until coolant emerges from the bleed hole as a steady stream.
6. Replace and tighten the bleed screw.
7. With tank still raised, continue filling the system until coolant level settles just below the filler neck.
8. Lower the header tank and refit it usng the locating pegs and mounting bolt.
9. Refit the narrow hose back onto the tank neck connector.
10. Leave the pressure cap off.
11. Ensure the aircon system is off.
12. Start the engine and have an assistant run it at 1500-2500rpm.
13. Be prepared to top up the header tank as the engine starts and maintain the level just below the filler nek.
14. When the coolant level starts to rise due to heat expansion, refit and tighten the pressure cap.
15. Maintain a fast idle until the cooling system gets hot and the radiator cooling fan trips on.
16. Allow the fan to reduce the temperature until it switches off, then stop the engine.
17. Allow the engine to cool completely, preferably overnight.
18. Check the work area for leaks.
19. Check the coolant level and adjust it to the MAX marker.

Avoid adding your own steps or wavering from the official method.

TC

TC - is this also the refill procedure to use after a complete draindown (for a KV6 coolant change)