Need some help with decoding an alternator. Heres what I've got: 1100659-42A 3G25 12VNEG (may be 8G25) Its a Delco Remy alternator on my 65 chevy pickup. I've seen some alternators go for 3-400 on ebay. I just don't wanna sell it for the $10 core and find out I can get more for it. Thanks for your help Derrick
42 amps, the date code is that 3G25 thing, first number is the last digit of the year (1963 or 1968?)), G is the 7th month July, 25th day. so it was made July 25th 1963 (or 1968) I'm assuming it's an external regulator type, if it's internal, then it's from the 70s or 80s I don't have a part number list handy that shows which it is.
You have a 42 amp GM alternator. Looks like similar alternators sell for around $60-$70, new. Not to skew the thread, but I have a GM 42 amp alternator too. Numbers on it are; 1102848 42A. Below that is written 8G25-12VNEG It has an internal regulator. I cannot seem to locate the application for this particular alternator. Can anyone help? I'm just trying to figure out what vehicle that application was for. Thanks.
Awh come on now, we know that Poulsbo is a sleepy little town but Waking up to answer a question asked in 2007 that Squirrel already answered December 10, 2007 is being a bit late to the party. The man from Poulsbo now holds the record for answering the longest dead Hamb thread. I need to make a trip over there on my boat though, That town is one of our favorite places in the world. The difference in application is how the alternator is clocked. Sometimes you have to re-clock one to get the connection for the plug in the correct spot.
Maybe if the man from the Yakima Valley had done a little research, he'd have known that this thread still pops up in a Google search, and since none of the other sites listed where giving me an answer, why not try asking in thread on a related subject. Who cares how old the thread is?! If you have an answer, just state it. No need being a "donkey" about it. If you don't have an answer, then shut up and leave people alone!
After seeing "Model A Vette"'s answer, I thought maybe those numbers might point to a specific application. Thank you for helping me out.
If you want to find some specific applications, you can google the phrase 1102848 gmpartswiki and you'll find lots of listings for it in the GM parts books, by applications. and this actually was a good thread to post the question on. Doesn't bother me at all.
Don't get your undies in a knot, it is a long way from the first time someone tossed out their expertise to a seriously long dead HAMB thread 15 years 5 months and 15 days +/- may indeed be the new record though. Google will burn your buns that way. Next time I am in Poulsbo the morning coffee is on me.
Interesting. I must've looked it up about 3 or 4 different ways and never got a hit for a "GM parts wiki". I guess you have to ask for it, specifically. Thanks again. I'll check that out.
that wiki is a place that has scans of many of the GM parts books, it's fun to look through. wasn't around when this thread started, though
Yes, thanks again for the heads up. I think I figured it out. I believe my dad was looking to upgrade his truck at one time and that alternator was going to be part of it. Timeline and application all fits.
With a 10 or 12 SI alternator you are usually looking at two differences. Amp output and the clocking of the back side of the housing to place the plug where it works best on certain applications. Chevy alternators are almost always clocked at 12 O'clock but some Buick and Cadillac or Pontiac alternators are clocked at either nine or three O'clock so the plug is in the correct position. This 120 amp unit on rock auto happens to fit an 85 Cad Deville we used to have about 10 years ago. 120 amp unit clocked at 12 O'Clock that used a Serpentine belt so a pulley swap is in order for V belts. I think I still have one of the alternators out in the shed that I took off one of those Cads I sold for scrap after my wife beat it to death. They were good running old tanks that were safe for her to drive 35 miles each way to work and back for several years though. That's all I know with these alternators, unless it is an off the wall application with a special case/mount a 10 or 12 Si alternator is just that a 10 or 12 si. you pick the amps you want and the clocking you want or you figure to take it apart and reclock it and go from there. some like that Cad unit put out pretty decent amps without paying a lot extra for a fancy high amp alternator. The lower amp rating for that cad is 108 amps. This image borrowed form Rock Auto with creds to them.
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