1940 Ford fan
- Thread starter papa267
- Start date
42merc
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Senior Member
Join Date: Feb 2011
Location: Buchanan, MI
Posts: 245
Re: Engine Fan
Everyone has their own solution for this common problem, this is mine. You must have a '40 fan mount pulley to start with. Remove 15/16" from the seal end of the '40 pulley hub, then drill the 3 or 4 spot welds from the pulley, then tap the pulley from the hub, turn the pulley around (reverse) and reinstall on the hub this time close to the fan hub. Put the assembly back on the crank snout and line the pulley up with the water pump pulleys (about 2-7/8" from the backside of the pulley to the machined face of the block), tap it square and reweld the spots. The pulley fits on the hub tight enough to hold its position while you do this. Next remove the new pulley and reinstall the 8ba pulley, bring the timing mark up to the pointer, without rotating remove the 8ba pulley, install the '40 and put a mark on the pulley where the pointer is. Probably file a notch there, after all this " aint no rocketship". This has worked for me a couple of times and no lathe required.
Join Date: Feb 2011
Location: Buchanan, MI
Posts: 245
Re: Engine Fan
Everyone has their own solution for this common problem, this is mine. You must have a '40 fan mount pulley to start with. Remove 15/16" from the seal end of the '40 pulley hub, then drill the 3 or 4 spot welds from the pulley, then tap the pulley from the hub, turn the pulley around (reverse) and reinstall on the hub this time close to the fan hub. Put the assembly back on the crank snout and line the pulley up with the water pump pulleys (about 2-7/8" from the backside of the pulley to the machined face of the block), tap it square and reweld the spots. The pulley fits on the hub tight enough to hold its position while you do this. Next remove the new pulley and reinstall the 8ba pulley, bring the timing mark up to the pointer, without rotating remove the 8ba pulley, install the '40 and put a mark on the pulley where the pointer is. Probably file a notch there, after all this " aint no rocketship". This has worked for me a couple of times and no lathe required.
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