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Author Topic: Cooling fan and clutch question?  (Read 1680 times)
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« on: August 17, 2006, 11:48:03 AM »

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? Huh
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« Reply #1 on: August 17, 2006, 01:26:09 PM »

First, take a look at this:
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:
« Last Edit: August 17, 2006, 01:54:19 PM by lakeholme » Logged

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« Reply #2 on: August 17, 2006, 03:06:25 PM »

Thank you - That is very helpfull information.
I learned something new, never realized that Chevy used the 3.25 spacing before 1969. Grin
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