Author Topic: GM Alternator replacement numbers  (Read 2854 times)

David K

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GM Alternator replacement numbers
« on: October 29, 2023, 10:08:09 PM »
I’m looking for the Chevrolet part numbers for 1968/9/70/71/72 replacement 61amp alternator.  My parts book is updated for 1974, but prefer the earlier version numbers if available.
My original alternator is 1100817 and was toast in Feb 1970. It’s impossible to find, so I’ll be fine with a correct GM replacement.
Mine lists 1100849 Delcotron
1846936 for a GM rebuild
I’d like both versions that are listed so I can research.
Thanks in advance.

bcmiller

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Re: GM Alternator replacement numbers
« Reply #1 on: October 29, 2023, 10:25:14 PM »
1972 book shows the same
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Mike S

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Re: GM Alternator replacement numbers
« Reply #2 on: October 30, 2023, 12:42:32 AM »
 Are the diodes replaceable? Or better yet, can the core be rebuilt?

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

169INDY

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Re: GM Alternator replacement numbers
« Reply #3 on: October 30, 2023, 04:13:10 AM »
Yes, Delco, Delcotron DN10 are fully serviceable.
This is my 814 for the 68Z I Did as a DIY, after we lost John P servicing.

We gota find a #_817__? for David!
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

David K

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Re: GM Alternator replacement numbers
« Reply #4 on: October 30, 2023, 04:36:00 AM »
Jim, I appreciate the support for the search. I’ve found a new blank end housing for $60, but it’s $100+ to get it stamped for my car. I think I’ll have to settle for the 1100849. They’re a factory replacement and they’re stamped like the rest with a date. Sometimes close enough is all you can get.

cook_dw

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Re: GM Alternator replacement numbers
« Reply #5 on: October 30, 2023, 12:30:06 PM »
....but it’s $100+ to get it stamped for my car...

Blasphemy.



bcmiller

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Re: GM Alternator replacement numbers
« Reply #6 on: October 30, 2023, 02:07:36 PM »
Please don't have it stamped. I know some people really really want every number to be right on their cars.  That is fine. After over 50 years I think having some things not fully original is fine.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

David K

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Re: GM Alternator replacement numbers
« Reply #7 on: October 30, 2023, 04:53:14 PM »
BMiller-not going with the restamp as it's really about juice vs the squeeze. I found a few factory warranty alternators rebuilt with date codes for $250 and a 5 year warranty. They actually align for this project. My alternator crapped out in Feb 1970, and a December build date on factory warranty unit works for me.
My front end piece where the mount bolt goes through is poor quality, the top bolt threads are stripped out, and the alternator now sits with an visible angle. So I'm replacing it nonetheless.  I will continue my search for the 817....

David K

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Re: GM Alternator replacement numbers
« Reply #8 on: October 31, 2023, 02:34:12 AM »
Is this painted? I thought the finish was supposed to be natural?
https://www.ebay.com/itm/264835973379

David K

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Re: GM Alternator replacement numbers
« Reply #9 on: November 05, 2023, 03:46:07 PM »
The reason I’m even going down this road is because the lower bolt mount hole is wallowed out, the top threads are stripped, and there’s a super thin cheap insert circa 1992 or so in there. The alternator actually sits at an angle, but functionally sound. Nonetheless after making an executive decision, I went with the NAPA lifetime unit. The main reason is all the ones I found were $200 or so, 55amp and not the correct 61amp including-including the current one. Also, I only drive the car a few times a year, but maybe more now. Anyway, for $80 and a lifetime warranty I’ll live with it. Upon further examination, it’s a GM housing with the stamp still on it. 1100839, 42amp, 9G23. If someone can let me know the the vehicle this was originally destined for, I would appreciate it. Being a July 23rd build date, I wonder if it got installed before the next model year. I didn’t see this as a warranty replacement part I’m my book and the interwebs never lie. My search turned up Chevelle (because they always do), Nova, and Full Size cars. It could be from a truck too. Either way, I’ll put the bolt through the mount hole first to make sure it’s good.