A horizontal rooftop engine cooling system includes one or more radiator units
horizontally mountable to the rooftop of a bus and including a radiator interconnected
to one or more passages of an engine of the bus to allow coolant to flow between
the engine and the rooftop cooling system to cool the engine. The cooling system
can incorporate a fan mounting shroud, a ram-air aerodynamic shroud, and/or an
ornamental aesthetic appearance shroud.
