Identifying the alternator

1991 BUICK PARK AVENUE
170,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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FRAGO
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Hi,

I need to change the alternator but I can't identify it yet. It's a Delco Remy but there is no label anymore. I don't know the nominal amperage. i don't know also how to identify the clock position of the plug because I don't know what is the 6 to 12 clock axis. what is the reference?
I added a picture...
Thanks for helping.
Franck
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Nov 1, 2020 at 3:09 AM
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ASEMASTER6371
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Good morning,

You have a 105 amp alternator. I attached the chart for you.

https://www.2carpros.com/articles/how-to-replace-an-alternator

https://www.2carpros.com/articles/how-to-check-a-car-alternator

As far as the clock position, it is referring to the post from the battery. In your picture, it is a 6 o clock.

I also attached a wiring diagram for you to be sure the alternator is the actual issue.

https://www.2carpros.com/articles/how-to-check-wiring

I attached a YouTube video for the repair as well.

https://www.youtube.com/watch?v=BGY18f5Duh0

https://www.youtube.com/watch?v=63d_LSf-1ac

Roy

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Nov 1, 2020 at 3:46 AM
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ASEMASTER6371
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Did you respond?

I got an email but nothing came through.

Roy
Nov 1, 2020 at 5:20 AM
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FRAGO
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Hi Roy,

Sorry for the inconveniences, it does like that and I don't know why.. My question was, how did you determine the plug clock position? What is the reference axis, which parts?
On RockAuto they speak about 7 or 11 o'clock for 105 amps alternator...
Nov 1, 2020 at 5:23 AM
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ASEMASTER6371
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Okay, the reference is the mounting bolt to the wire from the battery.

In the picture, it is the 7 o'clock position.

Roy
Nov 1, 2020 at 5:27 AM
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FRAGO
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Thanks again Roy.

By the way, the problem is the bearing are whistling... Sub question, what is the purpose of the 140 amps alternator?
Nov 1, 2020 at 5:39 AM
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ASEMASTER6371
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It was an option for the car when it was spec'd out at the beginning.

You are welcome.

Always glad to help.

Roy
Nov 1, 2020 at 5:41 AM
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ASEMASTER6371
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Nothing came through again.

Roy
Nov 1, 2020 at 5:46 AM
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FRAGO
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Many thanks Roy...
Regards from France.
Franck
Nov 1, 2020 at 5:50 AM
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ASEMASTER6371
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Be safe.

Roy
Nov 1, 2020 at 6:01 AM