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

Hot LT1 alternator

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Old Mar 11, 2012 | 09:17 PM
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Default Hot LT1 alternator

Have a 95 Corvette that I haven't driven in over a year. Finally got it running today after replacing a water pump, steering rack etc. And the alternator gets SO hot! I know a lot runs hot on these LT1 motors, but I can't even touch the top metal casing of the alternator after the car has been idling for a few minutes.

Is yours the same way or do I have a problem?
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Old Mar 11, 2012 | 09:49 PM
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After a year, the battery may be bad. Charge the battery with a charger overnight and let it sit for an hour.

Turn on the headlights and check the battery voltage. It should be over 12.5 volts if the battery is still good.
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Old Mar 12, 2012 | 10:59 AM
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The battery was replaced before I parked it last year. It's been in my garage downstairs and I have put it on a trickle charge at least once a month.

Battery voltage reads at 14v on the display.
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Old Mar 12, 2012 | 11:15 AM
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Sounds like an internal short in the alternator.
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Old Mar 12, 2012 | 04:03 PM
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I just pulled the belt. When I spin the pulley by hand it doesn't sound good. Might just be a bad bearing, but I guess I'll have to replace the whole thing.
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Old Mar 12, 2012 | 04:30 PM
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If you have a local auto electric shop it would be a better way to go.
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Old Mar 12, 2012 | 05:06 PM
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I'm going to try replacing the bearing, I have just ordered it. Now I just need a torx bit to get this thing off. grrr
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Old Mar 12, 2012 | 05:11 PM
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Yeah if you can take it apart and have what it takes to replace the bearing it may get you back in shape.

There is a shop here in town that I take all of mine to. Definitely a better option than going with a parts store replacement. Those are generally junk.
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Old Mar 12, 2012 | 07:26 PM
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I agree, $5 for a bearing to get the original 130k mile alternator working again or spend $140 on a reman that 1/2 the time are dead out of the box.
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Old Mar 13, 2012 | 01:17 PM
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I disassembled the alternator and the bearing would have been real easy to replace. Unfortunately it's not the rear bearing that is bad, but the one on the front behind the pulley. I can't get this apart.

Oh well, I just ordered an NSA brand new alternator, hopefully it works out alright.
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Old Mar 13, 2012 | 01:20 PM
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Well if you've got a new one coming that means you might have time to get your old one fixed. Call these guys, they do all my starters / alternators / even generators (6-volt).

They may be able to fix up your old one good as new then you'll have a spare.

http://local.yahoo.com/info-15360024...-bowling-green
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Old Feb 14, 2016 | 11:28 AM
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I see that this is a old post but I am having the same too hot to touch alternator problem,
I just replaced mine with a new ac delco and it is soooo hot can't even touch it. also smells like electrical when I park it in the garage after a drive.
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Old Feb 14, 2016 | 11:34 AM
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Originally Posted by gwagg
I see that this is a old post but I am having the same too hot to touch alternator problem,
I just replaced mine with a new ac delco and it is soooo hot can't even touch it. also smells like electrical when I park it in the garage after a drive.
You mentioned "just replaced" so I'd say the solution is simple. If this was a "local buy" you remove and exchange locally. If this was an Internet purchase the options likely change, maybe substantially. Good luck!
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Old Feb 14, 2016 | 12:05 PM
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Originally Posted by WVZR-1
You mentioned "just replaced" so I'd say the solution is simple. If this was a "local buy" you remove and exchange locally. If this was an Internet purchase the options likely change, maybe substantially. Good luck!
It's doing the same as the old one did except this alternator charging fine
It was a internet purchase.
I had my transmission serviced a couple of weeks ago and I really haven't driven it since due to surgery and of crappy weather.
I wonder if they maybe shorted something out.

Last edited by gwagg; Feb 14, 2016 at 12:12 PM.
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