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Old 06-02-2009, 09:08 AM   #1
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Squealing noise.. NEED HELP PLEASE

OK so i have a diagram because Im still puzzled ok


1. All new belts
2. New Alternator

I have a loud squeal noise as soon as I start my 1989 6cyl Wrangler up. It is a v belt not serp. So first I thought it was the belts. Replaced them all. Not the problem. Next alternator was bad replaced that with new one. The squeal is still there. So to narrow the search for which pulley is making the noise I pull off each belt one at a time. First was the (red) belt in the pic which goes to the A/C unit, water pump, harmonic. Noise still there. So I put that belt back on and removed the power steering one (Blue) which was also connected to water pump and harmonic. Noise still here. So I next removed all three belts and engine stopped squealing. So the only items that was linking the belt was the harmonic and water pump. The harmonic alone made no noise. So in troubleshooting it points to the water pump that is shot because thats the only item that connected to the two belts besides the harmonic. SO I replaced the water pump. Noise there. Im lost now because the only other item I can say it is the harmonic but its spinning fine with no resistance. I am 100% confused and need som help. Please help me ASAP i need this on the road so without a loud @$$ squeall.. Thanks Dan

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Old 06-02-2009, 09:15 AM   #2
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I have had other cars that the belts needed to be very tight, I mean using a pry bar like a 1/2 inch breaker bar to add tension while I tightened the adjustment. One thing you might try is some belt dressing on the offending belt. Available at auto stores. Can be a little messy as the belt throws it off. Spray it on when it is squealing and see if the sound changes. if its the belt which it sounds like it is then it may be a alight alignment problem, or something you live with. Try the super tighten and the belt dressing..

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Old 06-02-2009, 03:24 PM   #3
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I have an 89 with a 4.2 and A/C, power steering. Between the A/C pulley and fan there is a hard plastic tensioner/pulley that the belt rides under. I had a squeal noise approx. 10 years ago which was caused by this plastic tensioner. When I replaced it everything was fine. I like the diagram but my 89, the blue is the alternator/A/C. The red ( A/C, fan, harmonic) just like you have it. The belt is under the black plastic tensioner. Yours may be like that. I'm just going by how your diagram is. Not nitpicking the situation, just trying to help.
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Old 06-02-2009, 03:56 PM   #4
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release the mice!!!!!!!!!!! my 94 squeels too. neighbors complain.
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Old 06-02-2009, 06:03 PM   #5
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couple things ide look at. vbelts come in different lengths AND Widths. the belt backs (painted side) should be even with pullys tops and not sunken in. If they are too thin they will not make contact with the faces of the belts to the pulleys. next is your pulley are like 20 years old and probably polished like glass. Take belts off and roll a piece of 80 grit paper into a straw and break up the glaze inside the pulleys by just laying in v and with other hand spin pulley a few times. Dont be lazy and try doing it while engine is running or you may be missing some of these...
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Old 06-02-2009, 07:35 PM   #6
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Just another thought, throw an eyeball on the alignment of all the pulleys.

My P/S pulley was squealing, & I noticed it was a hair off. In other words, the belt had to bend slightly. I changed that belt, & it was still bent & squealing.

So I took all the bolts out of the P/S bracketry, & put it all back together. That cured the squeal, & the alignment problem.

Also Dooder's got a good point about belt thickness & glaze!
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Old 06-02-2009, 07:47 PM   #7
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i forgot about alignment. my moms old cherokee developed a alignment problem. Those power steering pulleys are pressed on pump shaft. after years walked in and was chopping belts every 10k or less, squeeling in morning and any amount of moisture. didnt discover for a while but went and bought a puller and drew the pulley back out on shaft to correct alignment. A simple alignment will cause tons of embarrassment and breakdowns and mom was mad that i my answer was the belt is already tight.
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Old 06-02-2009, 07:51 PM   #8
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Quote:
Originally Posted by dooder View Post
i forgot about alignment. my moms old cherokee developed a alignment problem. Those power steering pulleys are pressed on pump shaft. after years walked in and was chopping belts every 10k or less, squeeling in morning and any amount of moisture. didnt discover for a while but went and bought a puller and drew the pulley back out on shaft to correct alignment. A simple alignment will cause tons of embarrassment and breakdowns and mom was mad that i my answer was the belt is already tight.
I bet she was pleased to see you finally did figure out what to do!
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Old 06-02-2009, 08:02 PM   #9
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I bet she was pleased to see you finally did figure out what to do!
on my longterm list ide like a serp belt setup. and yes she was happy till she found something else wrong.
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Old 06-03-2009, 03:33 PM   #10
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Quote:
Originally Posted by rumblebee1967 View Post
I have had other cars that the belts needed to be very tight, I mean using a pry bar like a 1/2 inch breaker bar to add tension while I tightened the adjustment. One thing you might try is some belt dressing on the offending belt. Available at auto stores. Can be a little messy as the belt throws it off. Spray it on when it is squealing and see if the sound changes. if its the belt which it sounds like it is then it may be a alight alignment problem, or something you live with. Try the super tighten and the belt dressing..
dont use belt dressing! it drys out the belt! that stuff is horable!
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Old 10-23-2010, 11:15 AM   #11
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Buzzing noise...

When i start my jeep after it warms up it starts a buzzing noise coming from the air compressor, when i turn the heat or ac on goes away for a few then comes back.. im a mechanic in the army never dealt with this problem before just dont want to replace the wrong thing or maybe a quick fix any ideas??

2004 jeep wrangler X, 4in skyjacker, 33in mud terrains, PP throttle body, jet stage 1 performance chip, pace setter exhaust, hurst short throw,
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Old 08-08-2011, 09:51 AM   #12
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Originally Posted by Johnsextonjr View Post
When i start my jeep after it warms up it starts a buzzing noise coming from the air compressor, when i turn the heat or ac on goes away for a few then comes back.. im a mechanic in the army never dealt with this problem before just dont want to replace the wrong thing or maybe a quick fix any ideas??

2004 jeep wrangler X, 4in skyjacker, 33in mud terrains, PP throttle body, jet stage 1 performance chip, pace setter exhaust, hurst short throw,
I had the same problem. Then my ac went out, good luck!
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Old 12-26-2011, 01:18 PM   #13
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Talking 2006 Wrangler Squeals

I changed all the idler pulleys one by one and finally realized the tensioner arm was shot and was not applying enough tension to the belt. I changed the arm and a new serp belt (why not) and the noise is gone.

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