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Old 02-17-2012, 02:03 AM   #1
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Exclamation Jeep Gods, help please

Ok, so this noise just started tonight....

Someone who heard it says it might be a bad bearing in my alternator

someone who saw this video said my harmonic balancer probably crapped out.....

according to that same person, the harmonic balancer in my 2000 wrangler is located near my alternator....so it could be making my noise and the first person confused it for my alternator.



THE NOISE STARTS TO GO AWAY AS I REV HIGHER
I could not rev in this video, the neighbors were already complaining when it was at idle....was too late to rev.


ANY AND ALL HELP IS MUCH APPRECIATED

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Old 02-17-2012, 03:30 AM   #2
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while running the motor , get a long screwdriver, or a bar,, and place it on the alternator , timing chain cover , and what ever you think is making the noise place your hand over the handle of the screwdriver then place your ear on your hand ,, this will pin point the sound .

DONT PLACE IT ON ANY MOVING PARTS !

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Old 02-17-2012, 06:05 AM   #3
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If you take the belt off and spin the alt. pulley by hand, sometimes that bearing is bad enough you'll hear the squealing just spinning it by hand. I checked one once and spun it about three times and could hear three distinct chirps as it went around.

If there's no telltale noise you can go a step further and spin every pulley and feel for drag while listening for squealing.

If it's bad enough to piss the neighbors off, most likely what ever pulley it ends up being is siezed pretty good and won't spin free.
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Old 02-17-2012, 06:09 AM   #4
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The harmonic balancer is the main crank pulley.. easy way to rule out any accessories is to remove the belt and start it, dont let it run for too long though as your water pump wont be pumping.
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Old 02-17-2012, 06:18 AM   #5
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Maybe it's me being on my phone but your YouTube video didn't sound like a squeal, more of a tick.

But if you've had a mech listen to it then I'm sure it's an accessory on the belt drive and not a lifter or valve. Just didn't hear the high pitched noise usually associated with bad bearings in a pulley
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Old 02-17-2012, 06:22 AM   #6
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That sounds way too fast to be top end motor noise, unless its multiple valve train component failure.
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Old 02-17-2012, 06:27 AM   #7
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Yea, I just expected to hear that high pitched noise a bit more prevalent.
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Old 02-17-2012, 06:40 AM   #8
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I'm with you on it being a component.. honestly sounds like something hitting a fan blade.. but then with the audio quality and lack of video its hard to say how far away from under the hood they were.. im guessing since you can hear her say "go ahead" that shes under the hood
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Old 02-17-2012, 06:46 AM   #9
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you called?
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Old 02-17-2012, 06:49 AM   #10
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you called?
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Old 02-17-2012, 09:33 AM   #11
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I'm with you on it being a component.. honestly sounds like something hitting a fan blade.. but then with the audio quality and lack of video its hard to say how far away from under the hood they were.. im guessing since you can hear her say "go ahead" that shes under the hood
Yeah, my mom was under the hood and I was leaning in the car to turn it on.....
The sound is near identical to the sound in this video
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Old 02-17-2012, 10:31 AM   #12
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Does anyone know if the harmonic balancer is located near or below the alternator on a 2000 wrangler?
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Old 02-17-2012, 11:06 AM   #13
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Its the main pulley coming straight off the center (side to side) of the block..
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Old 02-17-2012, 11:20 AM   #14
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Originally Posted by JeepJLBrandon View Post
Yeah, my mom was under the hood and I was leaning in the car to turn it on.....
The sound is near identical to the sound in this video
I suspect the fan aswell from the noise.. maybe even fan clutch.
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Old 02-17-2012, 07:55 PM   #15
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ok, took the jeep to the shop this morning. They did the long screwdriver trick. The alternator seems to be the issue. It's still charging fine however.....they said it's probably a lose/broken bearing....

anyone know how easy it would be to fix this? or could a normal alternator repair shop fix this?
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Old 02-17-2012, 08:08 PM   #16
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Alt. is an easy swap. Two bolts and two wires if it's a 2.5.

Easier to get a remanfactured one and swap than fix the one you got

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