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post #1 of 5 Old 01-29-2002, 11:13 PM Thread Starter
Willis91YJ
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Location: East Lansing, Michigan
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Alternator Whine!

You know that noise that drives you crazy when the bearing or bushing or whatever the hell begins to wear on the alternator well I've got it. I was wondering if it is possible to replace the bearing without replacing the entire alternator because Mine tests out fine and actually puts out 15.3 volts so I really can't complain its just that that noise drives me batty. Let me know if anyone knows whats up
Willis

Oh sorry fellas its a 91' YJ with a brand new 4.0!


Black 91' YJ with fresh 4.0, Sitting on 31x11.5 Mickey Baja MTX's on 15x10 AR767, Borla Stainless cat-back, free flow cat, it seems like I keep breaking necessary parts just about the time I get enough money together for the fun stuff!!!
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post #2 of 5 Old 02-05-2002, 12:27 AM
jeepdaddy2000
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Most alt. bearing's are replacable. There is a number on the bearing, either on the outer race or on the grease seal. take that number to your local bearing house and they should be able to fix you up. PS you might want to check if it is over charging, 15+V is pretty high, sometimes those alternators wine when charging hard.

bazinga
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post #3 of 5 Old 02-10-2002, 08:51 PM Thread Starter
Willis91YJ
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Jeepdaddy,
Thanks bud I'll check into it and let you know.
Willis

Black 91' YJ with fresh 4.0, Sitting on 31x11.5 Mickey Baja MTX's on 15x10 AR767, Borla Stainless cat-back, free flow cat, it seems like I keep breaking necessary parts just about the time I get enough money together for the fun stuff!!!
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post #4 of 5 Old 02-19-2002, 06:43 PM
Mwrangler29
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You may want to try tightening the belt before you do the other stuff. I had that problem with my Blazer and i thought I tightened it good but it still had the Noise. Had a friend try it and he tightened it better and it was all good after that!

97' Wrangler
4.0L
Borla Headers
Soft top
Top 5 sports rack
Bestop Seat covers
31x10.50 Dunlop Mudders
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post #5 of 5 Old 02-20-2002, 10:27 PM Thread Starter
Willis91YJ
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Hey fellas,
Thanks for the ideas, but I am pretty sure after screwing with the belt that the bearing is shot! I'll try and get time to pull the bearing this weekend and see if I can finda anewone. Thanks again
Willis

Black 91' YJ with fresh 4.0, Sitting on 31x11.5 Mickey Baja MTX's on 15x10 AR767, Borla Stainless cat-back, free flow cat, it seems like I keep breaking necessary parts just about the time I get enough money together for the fun stuff!!!
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