C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Jun 8, 2023 | 07:50 PM
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I have this alternator and trying to get pulley off. The nut is off but the pulley won’t budge. I assume I’m supposed to use an Allen wrench. When I secure the fan blades and turn the Allen wrench the shaft along with the pulley turn together. I have soaked it for days with PB blaster. Won’t budge. Any ideas? Thanks.
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Old Jun 8, 2023 | 09:44 PM
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The allen is to hold the shaft while you undo the nut.
The nut is already removed.
Go to autozone and borrow a puller.

Originally Posted by 7T3stinger
I have this alternator and trying to get pulley off. The nut is off but the pulley won’t budge. I assume I’m supposed to use an Allen wrench. When I secure the fan blades and turn the Allen wrench the shaft along with the pulley turn together. I have soaked it for days with PB blaster. Won’t budge. Any ideas? Thanks.
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Old Jun 8, 2023 | 11:06 PM
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Originally Posted by carriljc
The allen is to hold the shaft while you undo the nut.
The nut is already removed.
Go to autozone and borrow a puller.
okay thanks
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Old Jun 9, 2023 | 12:27 PM
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Originally Posted by carriljc
The allen is to hold the shaft while you undo the nut.
The nut is already removed.
Go to autozone and borrow a puller.
What kind of wrench do you use to get the nut off while you are holding the shaft with an allen wrench?
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Old Jun 9, 2023 | 12:37 PM
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I use a box end wrench. I secure the allen wrench in the bench vise, end pointing up, drop the box end wrench over the allen wrench then place the alternator on the allen wrench, lift up the box end wrench and loosen/tighten the nut.


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