Alternator Numbers

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May 3, 2010 | 03:40 PM

427basketcase

Thread Starter

Drifting

Joined: May 2002

Posts: 1,546

Likes: 5

From: Sacramento California

Alternator Numbers

Did the alternators on C3 Corvettes have a specific part number, or are they just date coded?

May 3, 2010 | 03:42 PM

toddalin

Le Mans Master

Joined: Oct 2000

Posts: 8,897

Likes: 1,357

From: Santa Ana CA

Quote:

Originally Posted by 427basketcase

Did the alternators on C3 Corvettes have a specific part number, or are they just date coded?

Both.

May 3, 2010 | 04:10 PM

Alan 71

Team Owner

Joined: Sep 2006

Posts: 31,301

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From: Westminster Maryland

Hi 427b,
Here's an example:
1100950.... #
1A7 .... Jan. 7, 1971
42 amp
12 V neg
Regards,
ALAN

May 3, 2010 | 04:30 PM

Frogday

Drifting

Joined: Jul 2002

Posts: 1,697

Likes: 3

From: Woodinville WA

Quote:

Originally Posted by Alan 71

Hi 427b,
Here's an example:
1100950.... #
1A7 .... Jan. 7, 1971
42 amp
12 V neg
Regards,
ALAN

Hi Alan,
What did you use to clean your alternator? Is it painted?

May 3, 2010 | 05:07 PM

Alan 71

Team Owner

Joined: Sep 2006

Posts: 31,301

Likes: 4,389

From: Westminster Maryland

Hi FD,
The case was in pretty good condition to begin.
I used a brass wire wheel on my bench grinder at a slow speed. For some reason the front part of the case came out looking a bit different than the rear part??
The case has a LITTLE bit of clear on it to stop it from oxidizing.
Regards,
Alan

May 3, 2010 | 05:27 PM

427basketcase

Thread Starter

Drifting

Joined: May 2002

Posts: 1,546

Likes: 5

From: Sacramento California

Thank Alan, That's exactly what I was looking for.
BTW Nice looking alternator

May 3, 2010 | 08:26 PM

Mark G

Safety Car

Joined: Jul 2005

Posts: 3,700

Likes: 836

From: WI

Not to hijack this thread, but does anyone know if later C3's also have date-coded alternators? The one off my 81 has stampings on the front face partially under the fan blades. The numbers are:

1105 552 85A
9203 12v Neg

Any way to ID it? I suspect it's a GM replacement.

Thanks in advance.

Mark G

May 3, 2010 | 09:41 PM

gq82

Safety Car

Joined: Sep 1999

Posts: 4,930

Likes: 11

From: AnyTown NJ

St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15

Quote:

Originally Posted by 427basketcase

Did the alternators on C3 Corvettes have a specific part number, or are they just date coded?

They also had broadcast codes black ink stamped on them. In the case of my 71 alt 1100544, 61Amp, 1C8 (March, 8th 1971), 12V Neg, the broadcast code is RH & A. Over time these ink stamped codes would disappear.

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May 4, 2010 | 09:19 PM

Mark G

Safety Car

Joined: Jul 2005

Posts: 3,700

Likes: 836

From: WI

Quote:

Does anyone know if later C3's also have date-coded alternators? The one off my 81 has stampings on the front face partially under the fan blades. The numbers are:

1105 552 85A
9203 12v Neg

Any idea on these number?

Thanks in advance,

Mark G

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