Fan Belt Squealing>>help... - JeepForum.com

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post #1 of 16 Old 09-10-2013, 12:24 PM Thread Starter
branjmb
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Fan Belt Squealing>>help...

My fanbelt was squealing quite a bit the other morning, so I tightened her up a bit, seemed like it was fairly loose. That didn't stop anything. I sprayed some belt "lube"(?) on it, and it actually got louder.

The belt itself is less than 6 months old, and the waterpump is about a year old...

any ideas?


1992 Jeep Wrangler YJ
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post #2 of 16 Old 09-10-2013, 12:38 PM
Anticanman
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How are the rest of your components? Alternator working ok? Power steering pump? Pulley bearings aren't siezed?

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post #3 of 16 Old 09-10-2013, 12:56 PM Thread Starter
branjmb
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Quote:
Originally Posted by Anticanman
How are the rest of your components? Alternator working ok? Power steering pump? Pulley bearings aren't siezed?
The alternator should be just fine. The battery was drained before I discovered the squeal, but I did leave my lights on.

Ill look into the steering pump and pulley bearings, never Messed with them before

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2.5 L, 33x12.5 Cooper Discover STT, Homebrew Intake, RE 4" Lift, ProComp ES9000 Shocks.

YJ BUILD THREAD/
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post #4 of 16 Old 09-10-2013, 01:00 PM
bluedaffy
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I got a loud squeal the other day when my water pump went out. I know you said it was only a year old, but check the coolant levels just in case. I had no puddle under mine when I discovered the water pump died, which means it drained sometime before the last time I parked it
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post #5 of 16 Old 09-10-2013, 01:08 PM Thread Starter
branjmb
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Quote:
Originally Posted by bluedaffy
I got a loud squeal the other day when my water pump went out. I know you said it was only a year old, but check the coolant levels just in case. I had no puddle under mine when I discovered the water pump died, which means it drained sometime before the last time I parked it
Just added more coolant. Seemed to do a bit better but not completely gone by any stretch.

Looking into power steering now

1992 Jeep Wrangler YJ
2.5 L, 33x12.5 Cooper Discover STT, Homebrew Intake, RE 4" Lift, ProComp ES9000 Shocks.

YJ BUILD THREAD/
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post #6 of 16 Old 09-10-2013, 01:12 PM
bluedaffy
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I knew that it was absolutely my pump when it happened because just like you I added more coolant, went for a short cruise and then parked her to see if I could see any leaking. It was POURING out of the weep hole on the pump. I was actually relieved I saw this because it removes all doubt as to whether it was the water pump or not.
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post #7 of 16 Old 09-10-2013, 02:27 PM Thread Starter
branjmb
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Haven't seen it leaking coolant yet, took it on a short cruise as well.

how would you test pulley bearings?

1992 Jeep Wrangler YJ
2.5 L, 33x12.5 Cooper Discover STT, Homebrew Intake, RE 4" Lift, ProComp ES9000 Shocks.

YJ BUILD THREAD/
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post #8 of 16 Old 09-10-2013, 03:47 PM
Anticanman
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Take the belt off and spin them by hand. If they sound scratchy or have a lot of play then they will need replacing. I'm concerned that one isn't turning.

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post #9 of 16 Old 09-10-2013, 04:34 PM
rubisean
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a couple shots of silicone lubricant will stop a squealing belt, what a stupid idea...... do it the squeal will be gone and then it won't seem like such a stupid idea anymore.
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post #10 of 16 Old 09-10-2013, 04:51 PM
tom_sprecher
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I just put my Jeep together last week and the new belt did not squeal, but it felt a little loose. I tightened it up and it started to squeal. Loosened it back up. Who knows?

Tom
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post #11 of 16 Old 09-10-2013, 05:01 PM
plym49
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Are there grooves on the side of the belt? If so, your alternator bracket is bent or misaligned. It happens.

If the squealing was from the alternator belt and correlates to running the motor after your battery went flat, then the squealing is caused by the huge amount of work the alternator is doing to recharge the low battery. SO, more HO is flowing thru the belt to the alternator, and causing the squeal. Properly tightening it should eliminate the noise.
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post #12 of 16 Old 09-10-2013, 06:24 PM
Chrisnvegas
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Worn harmonic balancer? They can make a belt like noise. The rubber wears and they creep in a little and slightly brush the timing cover. Spray something on it to see if the sound changes.
Note: This applies to the 4.0 liter. Not sure about the 2.5. Maybe?

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post #13 of 16 Old 09-11-2013, 12:37 PM
rmappelt
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Make sure to check the idler pulley. Mine was squealing badly and I noticed that the belt didn't line up properly on it (but was fine on the others). Belt came off not 5 minutes later. Unscrewed the idler pulley by hand and of course the bearings are shot.

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post #14 of 16 Old 09-11-2013, 02:16 PM
kahanabob
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never put belt dressing on a serpentine belt...
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post #15 of 16 Old 09-11-2013, 02:49 PM
Bergy1
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I'm just guessing here, but I don't think we are talking about a serpentine belt.
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