Over heating

Make sure the radiator and condenser isn't clogged or dirty, if so clean with a degreaser and water. You may also have air in the system. If the system didn't take as much fluid as normal after the thermostat you may want to get a vacuum bleeder to make sure all the air is out. This puts the cooling system in a vacuum and you suck the coolant into the system. Most auto parts stores have them Alex