Alternator whine - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 10-15-2002, 07:10 PM
tangel
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Alternator whine

Hey All,
Started my jeep up the other day and immediately noticed a loud, hi-pitched whine coming from the alternator. The strange thing about it is it only whines when coasting or idling. When I press on the accelerator (or let the clutch out while idling) it goes away until the engine catches up. This one has me stumped pretty well, and I was hopin to gain some insight from you all. Thanks in advance!
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post #2 of (permalink) Old 10-15-2002, 07:12 PM
 
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Re: Alternator whine

Bad bearings. Time for a new one.
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post #3 of (permalink) Old 10-15-2002, 07:14 PM
 
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Re: Alternator whine

if its not a bearing noise, and actually a whine, like a turbo spooling up, then usually ive heard that on NEW alternators, and on alternators trying to charge dead or dying batteries.

if its a bearing type whine , one of the bushings/bearings in the alt has gone south, and itll eventually stop charging.

maybe its just unhappy? have you talked nicely to your alternator lately?

my wife exhibits those symptoms on occasion

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post #4 of (permalink) Old 10-15-2002, 07:48 PM
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Re: Alternator whine

Mine was whining after I got it wet this weakend. It pissed me off so I put it back in the water for a while but it still whined when I let it up. I guess alternators don't like to swim. It shut up once it dried off. Any chance some water got on yours?
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