Author Topic: Cooling fan and clutch question?  (Read 1772 times)

Pacecarjeff

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Cooling fan and clutch question?
« on: August 17, 2006, 04:48:03 PM »
I have seen that all of the early Chevrolets used the short water Pump through 1968 (except Corvette = through 1972) With this pump was I thought Always used a fan with 3" bolt spacing. Now I find out from some people that the 67-8 Z/28, as well as the L-78 used the later 3.25" spacing.??  is this true?

I had thought that spacing was not used on Chevrolet motors untill 1969.

3.25"  is the spacing used for the later "long" water pumps.
Are the water pumps different on those 2 - 67-8 Chevy applications, as to use a differnt fan and clutch.

I know that all the other motor divisions used the larger spacing, and Chevy was different. Why were these 2 applications different then the rest of the Chevrolet engine line? ???

lakeholme

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Re: Cooling fan and clutch question?
« Reply #1 on: August 17, 2006, 06:26:09 PM »
First, take a look at this:
http://www.camaros.org/coolingsystems.shtml
I realize this only addresses part of your question...
I think Kurt can help you with the rest.  He straightened me out on the 3 vs 3.25 spacing a while back.

I went back and found that thread.  Take a look:
http://www.camaros.org/forum/index.php?topic=482.msg2790#msg2790
« Last Edit: August 17, 2006, 06:54:19 PM by lakeholme »
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Pacecarjeff

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Re: Cooling fan and clutch question?
« Reply #2 on: August 17, 2006, 08:06:25 PM »
Thank you - That is very helpfull information.
I learned something new, never realized that Chevy used the 3.25 spacing before 1969. ;D