[GTP Dad]

If you have a radiator cap on the radiator run the car with the cap off until the level drops. It helps if the front of the car is pointed up hill. Once the thermostat opens the air should escape from the system. Refill the system and it should be ok. You may need to do this several times. Also there is a bleed screw on the thermostat housing that you can open and it will do the same thing. The cap is easier and faster.