The radiator fan used on the 1978 Ford F-250 pickup truck secures to the crankshaft pulley. The shroud fits around the fan. The shroud makes radiator cooling more efficient by channeling the air that the fan blows. If you need to remove the fan shroud and replace it, you must also remove the fan. Specialized tools are not required to complete the task, but a basic understanding of automotive repair is helpful.
Tools Used: Socket set with ratchet
Replace Fan Shroud
Park the truck, turn off the engine and open the hood. Remove the four bolts that secure the fan shroud to the back of the radiator using a socket and ratchet. You will locate one bolt in each of the four corners of the plastic shroud.
Slide the shroud backward and rest it on the crankshaft pulley. This exposes the front of the fan assembly.
Remove the four bolts that secure the fan to the crankshaft pulley. Pull the fan blades off the crankshaft pulley. Lift the radiator shroud and the fan out of the engine bay.
Place the fan into the new shroud and lower both pieces into the engine bay. Place the shroud against the engine and rest it on the crankshaft pulley.
Slide the fan onto the crankshaft pulley. Using the socket and ratchet, secure the fan with the four bolts.
Place the shroud over the fan. Secure the shroud to the back of the radiator using the four bolts, which you tighten with the socket and ratchet.
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