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Old 01-16-2007, 03:22 PM   #1
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idler or tensioner pulley

My Jeep starting making a new whirling/whistling noise this afternoon. Seems to be either the idler or tensioner pulley.. What's the best way to pin down which one it is, or should I just replace them both?

Thanks

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Old 01-16-2007, 03:45 PM   #2
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My tensioner was lose when I bought the jeep but I didn't figure it out right away. I thought the belt was bat but it only made noise in the morning when I first started up. When I went to change the belt I figured it out, tightened it up. No more squeek. Try it first, may save you money.

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Old 01-16-2007, 05:24 PM   #3
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absolutely. start with the easiest/cheapest fix and go from there. i'd start by loosening the tensioner, pulling the belt, making sure your pulleys all turn ok, and that the belt is ok. that'll eliminate a siezed pulley or bad belt. then tighten it back up and see if it just needed to be tighter, and that alone might take the squeak away.
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Old 01-16-2007, 07:50 PM   #4
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tensioners and pulleys tend to make a squealing sound if the bearing goes bad. If it's a whistling sound, it could be the power steering pump. Which side of the Jeep is the noise coming from?
Are you running big tires?
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Old 01-16-2007, 07:55 PM   #5
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it's coming from the passenger side. I'm running 33" tires.
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Old 01-17-2007, 02:04 PM   #6
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That sounds like my jeep....except that the colder it is, the longer the squeal takes to go away...and I am running 33's
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Old 01-17-2007, 02:15 PM   #7
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Took the Jeep for a short run a bit ago. The noise was there for about a mile than quit. No more noise.
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Old 01-17-2007, 03:37 PM   #8
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Quote:
Originally Posted by Geeps View Post
Took the Jeep for a short run a bit ago. The noise was there for about a mile than quit. No more noise.
If you haven't ruled it out yet, I say it's the tensioner. That is exactly what mine did before I tightened it up.
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Old 01-17-2007, 11:15 PM   #9
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Try selectively listening to each spot with a small diameter hose. Itll be real obvious which one is making the noise, your ears might ring for a while though.
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Old 01-18-2007, 09:07 AM   #10
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Mine does it for 5 to 10 seconds when I first start it up after sitting for a few hours, and it does it constantly at a stop or low speeds when I'm running the defroster/AC.
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Old 03-02-2007, 05:46 AM   #11
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Today, I'm planning to change out my serpentine belt.
I did a search and found this site with some helpful info.
http://www.getahelmet.com/jeeps/maint/belt/
He makes this comment...
"Addtional notes worth reading:
I have had numerous reports from readers that in 2002 Jeep changed the belt-tensioner square hole size to 1/2". So, you may need a 3/8" or a 1/2" breaker-bar depending on what year your vehicle is."

On my 2001 the hole is a 1/2".
Unless I'm looking at something wrong, the whole is between the pulley and mount/tensioner, right?
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Old 03-02-2007, 07:52 AM   #12
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Got R Done!!
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Old 07-21-2012, 04:15 PM   #13
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Adjusting Serpentine belt

Does anybody know how to adjust the serpentine belt on a 1995 Wrangler 4.0L. I think it migh be done at the power steering belt.
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Old 02-04-2013, 08:57 PM   #14
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Yes, you adjust the serpentine belt at the power steering pump (at least that's the way it is on my '94, your '95 is probably the same).

Loosen the two 13mm bolts on the back of the pump and the one in front at the bottom where the bolt will slide. Then adjust the long bolt that's on the right side of the pump (right side as you stand in front of the Jeep) until you get the right tension, and snug the 3 bolts back up.

One of those closed-end flat ratchet wrenches makes the job easier (13mm).

David, '94 YJ, 4.0L 6 cyl

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