Anybody know which is the correct fan in the pictures below for a '68 alternator? In particular, a 1100767 unit. I guess a third answer could be "neither."

If you look at the width of the fan blades, there are differences between them... the fan on the alternator has a single very wide blade.

I have a few alternators here that I've seen both on, and I have a hunch which should be right, want to verify before rebuilding.

Thanks!

 

Here's a start....Joe's '68 H/O....may be able to get an idea from his pics and I'll call him and ask about the alternator on this car (stamping number, etc)...

https://classicoldsmobile.com/forums...attention.html

 

Joe's car would have a '777 alternator because it has A/C. The non-A/C cars have a '767.

I'll keep digging through pics I have archived as well.

 

Can you provide the group and PN of these fans- the boxed one anyhow?

With that and a PN manual one could see if it is correct, and/or what one is correct for the application.

W/o a part in the box it is hard to go
PN Manual with application ==> correct PN ==> correct part

because typically a part does not have "the part number" on it anywhere... with rare exception such as say a horn relay which may have the PN last 3 digits, or a starter which typically has the full 6/7 digit PN.

So, say, you find that you need a 100123 [contrived PN] alt fan... unless you find one new in the box, how can you tell by looking if a given unit is a 100123? The Assembly Manual or the PN Manual may have additional clues such as blade count.

Even if you have a new part in the box, there's no way to know for sure that the part is what originally came in that box... has not been switched out either inadvertently or nefariously.

 

My parts manual (effective Dec '68) shows that '66-'69 uses an 11 blade fan with p/n 1966990. Both fans in the pics above have 11 blades.

The part number on the box in my picture above is 800594.

The group number is 2.274.

 

Luke, my car has the original alternator. It has the fan with the weird one large fan blade, but I am not 100% sure it is original to the alternator. I had it rebuilt back in 1999 - long before I knew such details existed and it is possible the rebuilder switched fans on it.

 

Thanks Joe. That's the one I'm thinking is correct, as the alternator in my picture is a December '68 (so '69 model year) 1100767 model.

 

Luke,
Pictures sent.

Sam

 

Thanks again, Sam. (this was another vote for the large blade fan, as shown on the alternator in my original post)

 

Luke, This pic is from the '68 dealer brochure, It's a 350 but it has the fan with the big blade in what looks like a silver cad plating

 

I have two "777" alternators, one dated August 1967 and the other in February 1968. Both have fans like the one on the left and the one in the above entry with the 350. I'm beginning to think that it was the fan of that year, whether 767 or 777.


Randy C.

 

ive had a bunch of NOS alts and alt fans..from what ive seen, theres 2 posibilities..the hook blade or the one thick blade...ive seen it both ways in 68-9 but ive never worked on an H/O

 

Thank you, gentlemen. We are going to use the one thick blade. Appreciate the assistance!

 

Thanks to Brett (Paladin31) for uncovering this info....

There was a January '71 production change from 01966990 fan to the 800594 fan, therefore the NOS one shown in the picture at the beginning of this thread should be correct for any cars after this time period.