My new engine overheats at idle but will cool down to normal temperatures while driving down the road. Where should I look?
Engine cooling fans and fan shrouds are most important when the vehicle is not moving. Without the wind blowing in the face of your hot rod, no air flow is moving though your radiator. A properly sized fan and appropriate shroud are necessary to move the needed air across the radiator when the vehicle is sitting still. There are various configurations of fans and shrouds that can be used. Whether an engine driven or electric fan is used, care should be taken to ensure a proper fit between the fan, shroud, and radiator. In some cases certain applications may require multiple electric fans.
