Don't do what I did 44 years ago! 
Opinion on Numbers Matching...
Melting Slicks
Joined: Feb 2017
Posts: 2,377
Likes: 838
From: New York
2017 C3 of the Year Finalist
St. Jude Donor '20- '21
Rebuild, rebuild is the only logical choice. If you don't want or can't I would at a minimum save the alternator for future restoration. Ike
Le Mans Master
Joined: Jun 2006
Posts: 6,390
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From: Tampa Florida
Melting Slicks
Joined: Dec 2014
Posts: 2,760
Likes: 2,290
From: Central UT
Agree you should rebuild it. I used to do this as a 'side' business for my show car friends. When you take it apart, bead blast the case and shoot it with a light coat of satin clear. That way it won't oxidize and will continue to look great. As mentioned, youtube will show you the ropes. Replace the brushes, bearings, etc. Not hard at all. And any of the major auto parts stores will spin test it for you after you're done - and they'll generally have the brushes and bearings too. Have fun!
Thread Starter
Intermediate
Joined: Feb 2019
Posts: 45
Likes: 1
Ok I did it, but my altimeter isn't showing a positive charge state. If I turn the lights on it goes decidedly negative. Essentially, my cleaning and inspection didn't change anything. The brushes looked fine. bearings were good. Do I have a regulator someplace in the car. ? what else could it be?
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,398
From: SW Florida.
the regulator is the white thing the 2 pin plug goes to. the little black thing on top is a diode trio. check that with an ohmmeter for e current flow only one way on all 3 legs. did you get a new regulator? now, there is a little tab on the regulator. you can touch a small nail to it and ground it. to case while engine is running. that will start it at full charge. about 5 minute mark he has a decent inside view of alternator. you can see the little tab on the regulator to ground. also note the 2 regulator screws that have insulator sleeves on them. 3rd has to not be insulated.
long as you are going back in, https://www.ebay.com/p/Delco-Alterna...d=302341259519
Last edited by derekderek; May 18, 2019 at 07:10 AM.
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Melting Slicks
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