[blackjackel]

Just had an Idea, why don't they make the outside body of the car conductive to heat and use it to cool the engine instead of a radiator? Imagine if the whole hood and front sides of the car were made out of metal and were directly connected to the engine through water much the same way a current radiator is...

This would make it so that there are no required openings and would greatly decrease aerodynamic drag. If the surface area isn't enough, perhaps they could have a few fins that are parallel to wind path to increase surface area if needed...