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Looking for suggestions on alternator not fitting.

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Old Dec 1, 2021 | 10:12 AM
  #1  
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Looking for suggestions on alternator not fitting.

I am having trouble with the alternator bat terminal hitting valve cover.
I have taller valve covers. The alternator is stock for 89 Camaro. The cs 130. I have the stock alternator bracket. I thought I might be able to clock the alternator but that would be impossible with the way the housing is.
My question: Is there an alternator that will fit this bracket with the battery positive in a different spot or that has a different type of connection that doesn't stick out from the housing. I do want to be able to use the stock alternator gauge.



Last edited by Natek; Dec 1, 2021 at 01:47 PM. Reason: Incorrect info
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Old Dec 1, 2021 | 01:28 PM
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Looking for suggestions on alternator not fitting.

might be able to take the stud and nut style output terminal off of a another model of cs130 alternator-might gain ~3/8" of more clearance VS the style you have now.
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Old Dec 1, 2021 | 02:10 PM
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Car: 1989 IROC-Z
Engine: L98 350 TPI
Transmission: 700R4
Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: Looking for suggestions on alternator not fitting.

Needs some zzzttt action with a die grinder.
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Old Dec 1, 2021 | 07:18 PM
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Re: Looking for suggestions on alternator not fitting.

Originally Posted by Komet
Needs some zzzttt action with a die grinder.
What would you suggest I grind?
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Old Dec 1, 2021 | 07:26 PM
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From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Looking for suggestions on alternator not fitting.

I would look for the Brackets that mount the Alternator on the Passenger-Side of the Engine.
There are Stock Brackets, and Aftermarket Brackets that will mount the Alternator on the Passenger-Side:








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Old Dec 1, 2021 | 07:34 PM
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From: WA
Car: 1989 IROC-Z
Engine: L98 350 TPI
Transmission: 700R4
Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: Looking for suggestions on alternator not fitting.

Originally Posted by Natek
What would you suggest I grind?
The bottom of the terminal. From the photo, it looks like it's pretty close to clearing if it wasn't quite so square.

Edit: little dentilation on the valve cover might work too, or a little of both.
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Old Dec 1, 2021 | 07:36 PM
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Re: Looking for suggestions on alternator not fitting.

Vorteciroc, I have the a/c still on that side.

I am trying to find something like this but with the serpentine pulley. I don't have an alternator or I would just take the pulley off.


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Old Dec 1, 2021 | 08:02 PM
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Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Looking for suggestions on alternator not fitting.

Just be careful with how close the Positive Terminal of the Alternator gets to the Valve-Cover.
The entire Engine is like a giant Negative Battery Terminal...
They will cause a large Electrical-Arc/ Short, if they are too close together.

Also an Insulating-Boot should always be used on the Positive Terminal:


Last edited by vorteciroc; Dec 3, 2021 at 11:45 PM.
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Old Dec 3, 2021 | 07:30 PM
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From: Honea Path, SC
Car: 1985 Z28
Engine: 383
Transmission: 700R4
Axle/Gears: 10 bolt/3.73
Re: Looking for suggestions on alternator not fitting.

I had the same issue and ended up having to grind quite a bit off the BAT terminal and then covered it with a rubber boot. It’s still an incredibly tight fit, but it gets the job done.
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Old Dec 5, 2021 | 10:23 PM
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Re: Looking for suggestions on alternator not fitting.

If your wires will reach, then you should be able to clock the rear alt housing. I've done it on an alternator before to get it positioned right for my wires.

You take the bolts out and Carefully pull the front & rear apart BUT only enough to be able to clock/turn it OR the brushes will come out and then you'd need to use clips to hold them in for re-assembly and I don't know how to do that.
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Old Dec 5, 2021 | 10:42 PM
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Re: Looking for suggestions on alternator not fitting.

BOOT77, thanks for the advice. I thought of that but was worried in case it did come apart, since it is brand new and I would not be able to return it if it ultimately did not work out. But since you have successfully done it, that will be the way I go. I am waiting on battery and ground cables from innovative wiring. Then I can make sure they are long enough.
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Old Dec 6, 2021 | 01:26 AM
  #12  
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From: IL
Car: 86 Iroc-Z
Engine: 383 HSR
Transmission: 700R4
Axle/Gears: 3.42
Re: Looking for suggestions on alternator not fitting.

I have a Powermaster Alt. similar to the one you posted on my serpentine setup. I have an 86 that I swapped with a new motor, and went from the old "V" set up to the serpentine. It works just fine, is clockable, and I believe I got from Summit. I'll have to look which model it is and let you know.
I believe it was

Powermaster 478618 - Powermaster XS Volt Alternators (on Summits site).


Last edited by 3rdgenzroc; Dec 6, 2021 at 01:38 AM. Reason: added info
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Old Dec 7, 2021 | 12:22 PM
  #13  
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From: Hawaii
Car: 89' Firebird / 87' Formula
Engine: 3.4 / 5.0
Transmission: 700-R4
Axle/Gears: 3.42 / 3.42
Re: Looking for suggestions on alternator not fitting.

I think 89? - 92 use the style that has has a stud and nut. if you get one of those you can probably trim / cut the stud for come clearance


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Old Dec 31, 2021 | 06:01 PM
  #14  
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Re: Looking for suggestions on alternator not fitting.

I finally got it figured out. I went with the power master 47461. It has the side mount. The alternator body still touches the valve cover, but just barely. The last 2 pics are the old alternator.

Just barely touching valve cover.



Side mount.
y. Thanks everyone for your suggestions.


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