67 L30 alternator fan assy - what finish ?

[67 RS Ragtop]

Detailing the engine area on my early production 67, and noticed the alt fan shows evidence of having been painted black. I saw no searches indicating this to be correct. Should it be silver cad or painted black ?? If anyone has a survivor or pictures of one - that would be great - Thanks.

[Mike S]

Whats the part number of the alternator?

Mike

[67 RS Ragtop]

I believe it to be opriginal to the vehicle, as  the fan / pulley assy has the part # stamped on it (3909815), but the housings are in the degreasing tank - should be part # 1100693 as per the AIM. Will try to post pic of fan in question.

[Mike S]

 
I have the original alternator on my 67 BB (same PN as yours) and it uses that same pulley. Mine was without a doubt dark phosphate originally. I re-phosphated it recently during my current re-restore of my restored 67 L35 ragtop (repainting).  
Yours looks like it has a phosphate finish too.


Mike

[67 RS Ragtop]

The reason I thought it was painted, was the differences in the finish, front versus rear - see attached picture of rear of the fan assembly.

[Mike S]

 I also have a spare pulley with the original finish and that is phosphated (dark gray) too. It looks like yours.

Is the date on the alternator between March thru May by chance?

Mike

[67conv6cyl]

I have a 7C31 date alternator the number on the fan 390  9815 same as yours this is a 67 6 cyl car very low miles and the fan is med gray phosphated and the pulley is a light tinge rust, it looks like pulley was not coated ..........Paul

[67 RS Ragtop]

If you noticed, the picture of the rear of the fan / pulley assy has a number 3 stamped on one of the cooling fins. Sorry, the housings are in the tank, but I'll check the assembly dates when I take them out. The car is a 10C (1966) production vehicle, so I would imagine it's possible to have a March through May alternator, as I have read they were produced in batches. I take it the concensus is that this part should be dark gray phosphate, but it sure appears to have paint on the face of it - maybe it had been refurbished in a previous life, as I am the 4th owner. Thanks again for your assistance / comments. I would still love to see a picture of an original / untouched part, but would imagine that's near impossible. Thanks again.

[67 RS Ragtop]

FWIW
  After having reread some of the posts it sounds as some of your vehicles may have a seperate pulley plus the fan, while mine is a "one piece" unit (fan and pulley are made as one) with a center locating (for lack of a better description) bushing that's pressed and welded in place. Just want to be sure we are talking the same "piece". Thanks

[Mike S]

I'll take pictures of the original pulley/fan and post it. Yes, it is one piece.

Mike

[Mike S]

I attached 2 pictures with one of an original pulley with its good condition finish still intact from a Dec 1966 dated 1100693 alternator (the pulley has an 11 stamp in a fin- possible month code)
I pulled this from a 67 Camaro parts car in 1983 to save as a spare (not many repo parts back then!).
Shown next to it on the right is a refinished pulley from a May 1967 dated 1100693 alternator that's on my convertible (the pulley has a 4 stamped in a fin- possible month code)
As you can see, the fan and pulley (one piece design) have a phosphate finish. I used a gun Parkerizing kit to refinish the May dated alternator pulley.
Phosphate and Parkerizing are the same, I believe. As you can see they look the same in shade and appearance despite being 45 years apart in finishes.

 I think the black paint you see may have been from a rebuild shop. They paint everything black or silver when rebuilding.

Mike

[67 RS Ragtop]

Thanks again Mike !! I appreciate the extra effort you went through, hope I to can be of some help to some other members myself, as my background is mostly hands on (technical -  retired factory service rep), and I would like to put it together as it was originally built.