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Dec 24, 2006 | 01:15 AM

Ben Lurkin

Thread Starter

Le Mans Master

Joined: Dec 2006

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From: Oquirrh Mountains

St. Jude Donor '09

Fan question

Does anyone know if the 7 blade mid-70's to early-80's style clutch style fan will fit a '66 vette? I need a little more cooling than what the 5 blade fan gives.

Thanks in advance,

-Lurkin

Last edited by Ben Lurkin; Dec 24, 2006 at 01:44 AM.

Dec 24, 2006 | 07:18 AM

wmf62

Race Director

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From: Inverness FL

St. Jude Donor '07

no reason why it shouldn't work as long as you get the same diameter as your 5-blade.
Bill

Dec 24, 2006 | 11:09 AM

Ben Lurkin

Thread Starter

Le Mans Master

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From: Oquirrh Mountains

St. Jude Donor '09

I guess that's what I'm really asking; if the 66 and 7-blade C3 fans are the same diameter.

Dec 24, 2006 | 11:35 AM

MikeM

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From: Greenville, Indiana

Quote:

Originally Posted by Ben Lurkin

I guess that's what I'm really asking; if the 66 and 7-blade C3 fans are the same diameter.

Check me out on this because I've forgotten. I think some of the later '70's used a larger pump shaft are larger bolt circle. That be the case, it won't fit your water pump unless you co-ordinate the two. I don't believe the later fan blade will interchange on the early clutch. If so, you'll have to change as an assembly. I believe a small block clutch has a longer shaft than the BB.

There was a seven blade fan made to fit the early clutch. It was used on AC jobs.

Dec 24, 2006 | 12:16 PM

66jack

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From: CA

Go electric it your not gonna go NcRS...

jack

Dec 24, 2006 | 12:32 PM

JohnZ

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From: Washington Michigan

'65-'70 BB water pumps had a 3/4" shaft and 5/8" pilot with a 3" hub bolt circle; '71-'74 pumps had a 3/4" pilot and a 3-1/4" hub bolt circle.

'60-'70 clutch fans had a 2-3/8" center hole and a 3" clutch mounting bolt circle; '71-'82 clutch fans had a 2-5/8" center hole and a 3-1/4" clutch mounting bolt circle.

Dec 24, 2006 | 01:01 PM

62Jeff

Tech Contributor

Joined: May 2005

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From: Conroe Texas

Quote:

Originally Posted by JohnZ

And yet another JohnZ post gets bookmarked on my computer for future reference. So I need to be looking for a 60-70, 7 blade fan for my factory A/C 65. Got it.