Pulley Change Out Long to Short Water Pump - Hot Rod Forum : Hotrodders Bulletin Board
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Old 05-24-2007, 12:22 PM
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Pulley Change Out Long to Short Water Pump

I've reworked the area where my radiator is located (56 Chevy) and want to change from my electric fan to a mechanical fan. I only have 2.25" clearance from the water pump shaft to the radiator. If I change from a long water pump to a short water pump, what pulley's will I have to change out? I have these pulley's AC, PS, Alt, WP & Crank. Will they all need to be changed or does the Water pump pulley take into account the shorter length and make the pulley line up with the others? Any help would be appreciated!

Mule
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Old 05-24-2007, 02:14 PM
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Short water pumps have their OWN pulleys and do not interchange with the long style ones. The belt is moved back about a inch or more.

So the A/C, PS and Alternator all need different mounts.

BUT ... it's Worth it
IMHO to get rid of a electric fan ...

I HATE electric fans


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Old 05-24-2007, 02:22 PM
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So when you say different mounts you mean pulleys don't you?
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Old 05-24-2007, 07:00 PM
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he means the mounting brackets
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Old 05-24-2007, 07:10 PM
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All the brackets are different, the pulleys are different....The alternator goes to the other side.............................and you dont gain much space.................
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Old 05-24-2007, 07:34 PM
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Thanks guys! I don't need much space. I almost have enough now for the mechanical fan. If I can gain 3/4 of an inch I think I will be OK.

Why would the alternator have to move to the other side?
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Old 05-25-2007, 04:15 AM
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Quote:
Originally Posted by Mule
Thanks guys! I don't need much space. I almost have enough now for the mechanical fan. If I can gain 3/4 of an inch I think I will be OK.

Why would the alternator have to move to the other side?
Because, on the short pump models, the alternator was on the drivers side.......unless you made custom brackets to mount it on the passenger side.
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Old 05-25-2007, 07:06 AM
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My alternator is on the drivers side now. I have custom brackets that were made for a AC install. I wanted my compressor nearest the passenger side so the hoses wouldn't be ran across the engine area. That made me relocate the alternator to the drivers side. Should be an easy fix. A little cut and paste!

Thanks for the help guys and gals (if any). I appreciate it!

Mule
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