Author Topic: 65 two groove water pump pulley question  (Read 2451 times)

Offline e093116

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65 two groove water pump pulley question
« on: February 16, 2010, 09:26:26 PM »
I recently purchased this pulley on eBay.  It is marked C5AE-8509A.

There are 4 extra holes in it that I have never seen in a water pump pulley.  Wondering if this is original for proper balancing or if they got drilled somewere in the life of the part.  FWIW, the holes look like they were made the same way as the holes for the 4 spacer/water pump bolt holes.

Comments welcome.
65 San Jose Fastback, May 15 build date

Offline CharlesTurner

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Re: 65 two groove water pump pulley question
« Reply #1 on: February 16, 2010, 11:37:50 PM »
Never seen one like that before.  Maybe an old racer trick or something?
Charles Turner - MCA/SAAC Judge
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Offline Bob Gaines

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Re: 65 two groove water pump pulley question
« Reply #2 on: February 17, 2010, 11:54:00 AM »
I also don't remember seeing the holes but conclude it must be for balancing also. I don't believe it is factory done IMHO. Bob
Bob Gaines,Shelby enthusiast, Shelby collector , Shelby concours judge SAAC,MCA,Mid America Shelby

Offline J_Speegle

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Re: 65 two groove water pump pulley question
« Reply #3 on: February 18, 2010, 04:06:08 AM »
Have seen at least a couple with the extra holes drilled. Could not explain them either. Don't recall if they were single or double grooved
Jeff Speegle

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Offline Bob Gaines

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Re: 65 two groove water pump pulley question
« Reply #4 on: February 18, 2010, 11:33:43 AM »
I wouldn't use it unless I had to especially since it isn't in it's original context on your engine IMHO. It is not a hard pulley to find in the scheme of things.  Even if eventually info bears out that it is a factory variant it will certainly raise questions on any kind of original appearing car . Unless of course you like a lot of questions and controversy then that pulley is the ticket . Just my 2 cents. Bob
Bob Gaines,Shelby enthusiast, Shelby collector , Shelby concours judge SAAC,MCA,Mid America Shelby

Offline J_Speegle

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Re: 65 two groove water pump pulley question
« Reply #5 on: February 18, 2010, 10:06:32 PM »
I wouldn't use it unless I had to especially since it isn't in it's original context on your engine IMHO. It is not a hard pulley to find in the scheme of things.  Even if eventually info bears out that it is a factory variant it will certainly raise questions on any kind of original appearing car . Unless of course you like a lot of questions and controversy then that pulley is the ticket . Just my 2 cents. Bob

+1   - you don't want to be the "pulley with the holes in it" owner ;)
Jeff Speegle

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Offline ExportMach

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Re: 65 two groove water pump pulley question
« Reply #6 on: March 08, 2010, 11:06:41 PM »
My same pulley doesnt have such holes. Given the pulley size/weight/diameter it would not need to be balanced to be safely used. Someone might have thought it would be fun to try though.
Mark C
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