An engine compartment cooling system includes an axial fan assembly and a remote mount fluid cooler assembly. The axial fan assembly and the remote mount fluid cooler assemblies are mounted in clear holes in at least one of the quarter panels. The axial fan assembly exhausts engine heat outwardly from the engine compartment through the quarter panel. The fluid cooler assembly receives ambient air through the quarter panel into the engine compartment. The axial fan and fluid cooler assembles are controlled using, sensors, signal data, and a controller. The controller is programmed with the operation data so that the cooling system optimizes engine cooling while varying operation of the engine's cooling system, and the axial fan and the remote mount fluid cooler assemblies according to the invention.