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Old 08-03-2008, 09:53 PM   #1
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Question What is this noise?

Whenever I start her up, she squeeks for some time before stopping. Rather annoying if I do say so myself. I think it's one of the pulleys on the belt. Is it the pulley all the way on the right side of the engine which is the power steering pulley? That's where the noise seems to be coming from. Any ideas of what the cure can be? I have noticed recent PS fluid drops under the engine, but can't find out where it's leaking out from. Wonder if that has anything to do with it? Appreciate the feedback!

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Old 08-03-2008, 10:19 PM   #2
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Is a squeak or more like a loud, high pitched screeching sound? A good first thing to check is make sure that the belt is tight. If the noise is worse with the AC on than off, its almost surely an under tensioned belt.

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Old 08-05-2008, 08:58 AM   #3
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It's a continuous screeching sound. And I don't have A/C so I couldn't test that. Perhaps just tightening the belt is the cure? Think someone could give out some tips on that?
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Old 08-05-2008, 09:02 AM   #4
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possibly belt tensioner pulley had to replace the one on wife's GC
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Old 08-05-2008, 09:10 AM   #5
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Check your water pump. I had the same issue with a nisaan. It would screech and squeak, sometimes worse than other times. I wound up blowing the pump, and being out of a vehicle for three days.
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Old 08-05-2008, 09:10 AM   #6
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Sounds like a loose belt to me. See if it can be tensioned a bit and yes, check the belt tensioner.
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Old 08-05-2008, 10:21 AM   #7
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Take a piece of small diameter hose or a long screwdriver, put one end at your ear and touch all the accessories. Watch out for the fan! This will tell you exactly what is squeaking, kinda like a stethoscope. Id say start at the tensioner.
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Old 08-05-2008, 01:03 PM   #8
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With the engine off, apply a can of belt dressing over the belt and the pulley's. Restart the engine and check again.

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Old 08-10-2008, 11:11 PM   #9
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Tightened the belt up yesterday and at first it was all quiet, but today the noise is back again. I'm gonna go buy some belt spray, test it out and see what happens, the belt is pretty warn anyways so if I do figure out what's giving me an issue, I think a new belt is gonna be put in.
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Old 08-11-2008, 07:00 AM   #10
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If you know your belt is worn, why not just replace it first and save your money that you would have spent on a can of belt dressing.

While the belt is off, spin all of the accessory pulleys to see how they feel and sound. The idler pulley is certainly easy to check and replace if it sounds dry and or wobbles (after you re-tighten the center bolt that is), but dont forget to take the water pump for a spin and check for wobbling. Since you dont have AC, you won't have to bother spinning the AC clutch bearing (which I've known several to go out...including mine).

I'll also remind you that if you've never dealt with the serpentine belt on a Jeep, they require a lot more tension than you think, and they normally need to be re-tensioned after you put the new belt on and have driven it around awhile.
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Old 08-11-2008, 09:45 PM   #11
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Yea, I know it seems sort of ignorant on my part not to just replace the belt in the first place. I just wasn't sure if there could have been a simple solution that could have cured my dilemna. Ah well, thanks for the help, I'll let ya know how it all goes.
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Old 10-21-2008, 06:20 PM   #12
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I have a similar problem. Starts up without noise and then within a minute the noise begins. Pretty loud. I spray the belt dressing and it goes away, until the dressing dries up and it's back. I believe it's tight enough. Started after we installed a new alternator and belt.
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Old 10-21-2008, 06:46 PM   #13
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The tension on the 4.0 has to be set alot tighter than most other vehicles.The twist and push method does not work on a Jeep.The normal tension on a serpentine belt is around 90lb but the wrangler calls for 180lb .The best way to tell is with the A/C but since you do not have it.Make sure your power steering fluid is full since you noticed a leak if so go ahead and start the Jeep and cut your wheels all the way one way or the other and hold it there.If it squeals loosing the tensioner pulley bolt and give the tension adjuster bolt a couple more turns and try again until you get no noise from cutting the wheels and holding them to one side.

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