82 CE Electrical Issue
Thread Starter
Intermediate
Joined: Oct 2020
Posts: 25
Likes: 2
From: Byron, Ga
82 CE Electrical Issue
I am trying to diagnose an electrical issue. I suspect the alternator bearings, but that is just a suspicion at this point.
Typically just after startup, I will get a noise from the engine compartment that sounds like a belt slipping. At the same time RPMs drop slightly, and the voltmeter pegs on the high side. Interior lights will dim, and the radio loses power.
Any advice how to diagnose the issue?
Typically just after startup, I will get a noise from the engine compartment that sounds like a belt slipping. At the same time RPMs drop slightly, and the voltmeter pegs on the high side. Interior lights will dim, and the radio loses power.
Any advice how to diagnose the issue?
Race Director
Joined: Mar 2017
Posts: 11,949
Likes: 4,507
From: Virginia
You could remove the alternator belt and see if the symptoms go away. A mechanic's stethoscope, a long screwdriver, or a piece of rubber hose can make debugging specific sound locations easier.
If it turns out to be that, @interpon posted the process he went through to rebuild his alternator, including replacing the bearings. Or this could be a great opportunity to upgrade to a higher amp output alternator.
Starts at post 98:
https://www.corvetteforum.com/forums...uestion-5.html
The voltmeter pegging high is a concern. What are the details on your car? (Year, engine, etc).
If it turns out to be that, @interpon posted the process he went through to rebuild his alternator, including replacing the bearings. Or this could be a great opportunity to upgrade to a higher amp output alternator.
Starts at post 98:
https://www.corvetteforum.com/forums...uestion-5.html
The voltmeter pegging high is a concern. What are the details on your car? (Year, engine, etc).
Last edited by Bikespace; Nov 4, 2021 at 11:28 PM.
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
Charge your battery all the way up and take your alternator belt off temporarily. If it is the alternator, the noise will go away. While the belt is off, spin it with your hand - you will be able to feel if the bearings are toast.
Thread Starter
Intermediate
Joined: Oct 2020
Posts: 25
Likes: 2
From: Byron, Ga
You could remove the alternator belt and see if the symptoms go away. A mechanic's stethoscope, a long screwdriver, or a piece of rubber hose can make debugging specific sound locations easier.
If it turns out to be that, @interpon posted the process he went through to rebuild his alternator, including replacing the bearings. Or this could be a great opportunity to upgrade to a higher amp output alternator.
Starts at post 98:
https://www.corvetteforum.com/forums...uestion-5.html
The voltmeter pegging high is a concern. What are the details on your car? (Year, engine, etc).
If it turns out to be that, @interpon posted the process he went through to rebuild his alternator, including replacing the bearings. Or this could be a great opportunity to upgrade to a higher amp output alternator.
Starts at post 98:
https://www.corvetteforum.com/forums...uestion-5.html
The voltmeter pegging high is a concern. What are the details on your car? (Year, engine, etc).
