1969 L36 Alternator 1100833 Pulley/Fan

[Steve C.]

I am trying to find the subject alternator which is hard enough but I also want to make sure I get the right pulley and fan. My car has no P/S and no A/C, so I think I need a 3829387 (Broadcast Code "AI") pulley. Am I on the right track? Also, are the stamped fans common to the different 10SI variants or different? How do I identify the one that is required for the 1100833 for no P/S and no A/C? Guidance appreciated.

[Joe L.]

Re: 1969 L36 Alternator 1100833 Pulley/Fan

I am trying to find the subject alternator which is hard enough but I also want to make sure I get the right pulley and fan. My car has no P/S and no A/C, so I think I need a 3829387 (Broadcast Code "AI") pulley. Am I on the right track? Also, are the stamped fans common to the different 10SI variants or different? How do I identify the one that is required for the 1100833 for no P/S and no A/C? Guidance appreciated.

Steve------


Pulley was GM #3846180. Fan was GM #3843346. However, late 1969 may have used fan GM #1966990. Part numbers are NOT stamped anywhere on the fans. I do not recall if the 3846180 pulley was stamped with a part number.

[David L.]

Re: 1969 L36 Alternator 1100833 Pulley/Fan

You can find a drawing of the 3846180 pulley in the link below (Mar. 12, 2011 @ 6:58 PM).
Enclosed a photo of a NOS 3843346 fan as well as 2 photos of a used original (front & back).
Dave

https://www.forums.ncrs.org/showthre...971#post542971

[David L.]

Re: 1969 L36 Alternator 1100833 Pulley/Fan

Apparently there were two versions of the 1966990 fan (photo below), different manufacturers I assume. The one on the right side has a "shark tooth".