C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

85/86 alt. Bracket pics

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Old Feb 21, 2023 | 06:01 PM
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Default 85/86 alt. Bracket pics

I need a good pic or p/n of some brackets and the parts book isnt really helping due to the various years and my situation. Iam thinking that 86 has a bracket from the back of the air pump to the bosses on the intake and another one for the alt to the exhaust. Problem could be my accessories and brackets are 85 and the intake is 86. Any thoughts
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Old Feb 21, 2023 | 08:17 PM
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Here are the pictures you requested. HTH.


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Old Feb 22, 2023 | 08:16 AM
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Thanks for the pics. Are those bosses on the bracket arm part of the bracket (welds) or are they spacers?
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Old Feb 22, 2023 | 09:20 AM
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Hard for me to tell and I don't remember when I replace the alt on my Z51. They look "attached" to me. Here are a couple of pics so you can decide.
At Alternator


At Exhaust


HTH,

Joe K

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Old Feb 22, 2023 | 10:36 AM
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Joe, Thanks for the pics, 2 things, is there an upper bracket that goes to the ait pump to intake manifold and it looks like in one of your last pictures there is a brace that foes from the lower power steering pump to the motor mount. Some c4 guys sware its there but I got under the car and I dont see a place for it. There are a bunch of them for sale on ebay.,
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Old Feb 22, 2023 | 11:06 AM
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Here are the best pictures I could get. I don't see anything attached to the intake or the motor mount.
This one and the one below it are of the air pump.




Here's the motor mount




Joe K




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Old Feb 22, 2023 | 11:40 AM
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Hard to tell in the last pic what that rod is and where is it located.

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Old Feb 22, 2023 | 11:48 AM
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Perspective is a little strange but it a power steering hose.

Joe K
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Old Feb 22, 2023 | 11:59 AM
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Here is the ebay item that is being sold as a power steering pump brace. There are a bunch of them on ebay. Dont see where it would go. 392974305910
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Old Feb 22, 2023 | 12:34 PM
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Though I haven't looked under the car that well I cannot see anything like what I saw on ebay. I'd say that there isn't one on an 85. Here is the FSM exploded view of the assembly.


Joe K
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Old Feb 22, 2023 | 04:42 PM
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There are alot being sold as that but I am with you, dont think the 85 has one. What is interesting about that last picture is that it does not show
that stud/nut for the air pump that we talked about. I bet back in the 80's the dealers had microfiche parts cards, not the books that we have.
Not only would the books not hold up for daily use but they probably were more comprehensive.
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Old Feb 27, 2023 | 05:42 PM
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Alt brackets came today but what i found interesting with the ac delco alt is the top bolt is metric and the bottom bolt is 3/8.
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Old Feb 27, 2023 | 06:09 PM
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GM # 14084334 attaches to the 3d stud.

GM# 14085724 looks like you have appropriately PLACED?

Bolt to the rear of the alternator needs to be/should be M10 at the bottom. The brace is maybe M8 at the top?

What is the alternator off of?
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Old Feb 27, 2023 | 06:41 PM
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Its new from rockauto. M10 sounds right almost identical to 3/8.
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Old Feb 27, 2023 | 06:51 PM
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Originally Posted by johnfin
Its new from rockauto. M10 sounds right almost identical to 3/8.
If it's a 17SI it should be M10 bottom for sure.
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