Put the car...
Put the car over your shoulder and gently rub its back until.......
BURP!!!!!!!!!!!!
Now for the real procedure.....
When filling the coolant system, remove the fitting attached to the thermostat housing. It's a 1/2" bolt that has a round warning label attached (if still there). Either way, it's on a stem that puts it about the height of the housing tube.
Fill the radiator with anti-freeze-distilled water mixture (yes, use distilled, better for the motor and radiator) and then, when done...replace the fitting. Leave radiator cap off and start car. Leave heater on so that coolant will flow there.
Coolant will start to come out of radiator and bubble over. When thermostat opens, fill radiator with coolant to top and cap off.
Test drive car and make sure all is well.
I find this the best way to aviod the air bubbles getting trapped in the coolant system and has worked well for years.
Don