Overheating

Check to see if your radiator fan is turning on is it electric? If it is your coolent temp sencer turns it on. That might be bad. If it's on your water pump might be bad or your thermostate could be stuck. Check the plug to the radiator fan it might not be plugged in all the way.

Purge air out of the system. You may have an air lock.

Maybe air in system bleed like this. Remove cap from overflow tank fill with antifreeze to full mark leave cap off and start vehicle and let idle you will notice level in tank start to rise this is normal once thermostat starts to open level in tank will drop add more antifreeze to full mark then put cap back on.

Yup F_O_Rs probably right I didn't even thank Abt that.

Do it with engin cold your fill jug might be pressureized.

I hate this word correction.

If mechanical fan, did you put the radiator shroud back on? It's required to be there for proper cooling as is directs the air through the radiator