Author Topic: 67 L30 alternator fan assy - what finish ?  (Read 7217 times)

67 RS Ragtop

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67 L30 alternator fan assy - what finish ?
« on: April 17, 2012, 08:09:24 PM »
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

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #1 on: April 17, 2012, 09:58:57 PM »
Whats the part number of the alternator?

Mike
67 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

67 RS Ragtop

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #2 on: April 17, 2012, 10:58:25 PM »
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

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #3 on: April 17, 2012, 11:21:11 PM »
 
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 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

67 RS Ragtop

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #4 on: April 18, 2012, 12:09:10 AM »
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

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #5 on: April 18, 2012, 12:15:25 AM »
 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
67 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

67conv6cyl

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #6 on: April 18, 2012, 12:44:30 AM »
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

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #7 on: April 18, 2012, 01:23:16 AM »
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

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #8 on: April 18, 2012, 01:37:34 AM »
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

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #9 on: April 18, 2012, 02:41:56 AM »
I'll take pictures of the original pulley/fan and post it. Yes, it is one piece.

Mike
67 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

Mike S

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #10 on: April 18, 2012, 03:29:18 AM »
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 04B LOS SS/RS L35 Hardtop - Original w/UOIT
67 05B NOR SS/RS L35 Convertible - Restored

67 RS Ragtop

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Re: 67 L30 alternator fan assy - what finish ?
« Reply #11 on: April 18, 2012, 03:59:05 PM »
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.

 

anything