11. Also make sure the radiator is sealed or has minimal gaps around the fans and or core support. If the incoming air from driving flows around the condenser then the condenser can't do its job properly. This also holds true for the fans that are sucking the incoming air past the condenser and radiator; if they can't draw suction because of a loose-fitting fan shroud then the airflow is reduced. Think of it like trying to drink soda from a straw with a hole in it, you can't get the soda up the straw until you plug the hole.