@dms664
when you are done for driving of day n engine is hot fans are running lift the bonnet. very slow i mean real slowly remove the radiator cap (so it does not boil up with gush incase of bad gaskit only) . let engine run for 2 cycles of automatic fan then shut down, put radiator cap over driving seat, close the bonnet. thermostat valve before closing will allow bubbles to escape into open passage.
Check level in morning add coolant & replace radiator cap.
if you want to do that during day get a funnel with thin tail to insert in radiator collar. leave engine running you will see coolant level rise & fall in funnel, keep adding coolant, it will take 10 - 15 minutes to remove air bubbles from the system.
