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Old 03-26-2019, 08:29 PM
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A390GT A390GT is offline
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Default 1968 Alternator

I’ve seen many an alternator on 68 pontiacs but this is the first time I’ve seen one with an open face?
The wagon has a/c and is from the west coast.
I’m thinking this is not the correct alt. Seeing it has a double pulley

Any thoughts
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  #2  
Old 03-26-2019, 09:51 PM
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Stuart Stuart is offline
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Never seen one like that before. Was it possibly cut out by a previous owner? I can't tell from the pictures, but there must be something that holds the front bearing in place.

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Old 03-26-2019, 10:38 PM
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68bird400HO 68bird400HO is offline
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Quote:
Originally Posted by A390GT View Post
I’ve seen many an alternator on 68 pontiacs but this is the first time I’ve seen one with an open face?
The wagon has a/c and is from the west coast.
I’m thinking this is not the correct alt. Seeing it has a double pulley

Any thoughts
Looks like one that has been through a rebuilder where they used the original 10DN externally regulated rear half and slapped a different front half on it. The front half looks like a 5 spoke unit which could be correct for a 71 A or F Pontiac. Are there any numbers stamped on top just behind the upper bolt ear?

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  #4  
Old 03-27-2019, 06:50 AM
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A390GT A390GT is offline
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I’ll look for the numbers today..

The double pulley has to be wrong.

I’m trying to find my book for the belt routing but I’m pritty sure it’s supposed to be a single pulley.

  #5  
Old 03-27-2019, 01:18 PM
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A390GT A390GT is offline
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I don’t see any marking on it
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Old 03-27-2019, 03:14 PM
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68bird400HO 68bird400HO is offline
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Not surprised. Looking at it now, it does look like a 6 spoke front half which is what the repop fronts were fashioned after vs the 5 spoke. I would believe it is functionally similar to original, just looks different.

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Old 03-27-2019, 06:45 PM
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A390GT A390GT is offline
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Is this something I want or need? Or should I pull one of my other cores to rebuild.
I think it’s cool looking but with my luck it will suck in a rock

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Old 03-27-2019, 09:15 PM
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Keep it a lot of people like the open faced end especially for the 10SI alternators. Don't worry about sucking in a rock. The air is pulled from the back of the alt to the front. In other words the fan pulls air through not pushing it through.

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Old 03-29-2019, 10:37 PM
Goatracer1 Goatracer1 is offline
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With the double pulley it probably was from a Buick. If you don't want the pulley remove the nut and install your single pulley.

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