Will mud cause the serpentine belt to squeak? - Defender Source
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  #1  
Old February 21st, 2015, 01:17 PM
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Carl Jonsson
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Will mud cause the serpentine belt to squeak?

My serpentine belt and/or bearings have started to squeal. I have had a fair amount of mud spray up on the engine lately. Could it be that the mud/grit is causing the belt or bearings to squeal? Do any of you hose of the engine (not power wash)? Is it ok to rinse the alternator off? I'm trying to determine if it's the mud causing the noise or if one of the bearings are going on the water pump or alternator.
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Old February 21st, 2015, 02:13 PM
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Quote:
Originally Posted by Manimal View Post
My serpentine belt and/or bearings have started to squeal. I have had a fair amount of mud spray up on the engine lately. Could it be that the mud/grit is causing the belt or bearings to squeal? Do any of you hose of the engine (not power wash)? Is it ok to rinse the alternator off? I'm trying to determine if it's the mud causing the noise or if one of the bearings are going on the water pump or alternator.
Wet mud maybe a little. Dry mud prob not. Get coolant on your serpentine and that yotch will yap like a pack of damn beagles.

Hose it down with low pressure and your fine

Theres good videos on youtube for figuring out cause. If you spray water on belt and noise stops then not a bearing.
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Old February 21st, 2015, 11:23 PM
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Thanks!
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Old February 22nd, 2015, 07:38 AM
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The tensioners go all at once and then your DOA. If you hear noise replace it. Sucks to be far away and this puppy explode on the road. I know.
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Old February 22nd, 2015, 12:25 PM
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The tensioner and water pumps are new-ish. The alternator is not but I have a new one waiting to be installed. I'm really hoping it is the the bearing in the alternator.
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Old February 22nd, 2015, 12:40 PM
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The tensioner and water pumps are new-ish. The alternator is not but I have a new one waiting to be installed. I'm really hoping it is the the bearing in the alternator.
Seriously doubt it's any bearing. did you give the belt a squirt of water yet? Most common cause of belt squeals are belt contamination or pulley misalignment.
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Old February 22nd, 2015, 12:47 PM
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I've sprayed it generously with belt dressing a few times and it seems to go away for a little while. I'll try water later today.
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Old February 23rd, 2015, 05:39 AM
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could also be the belt itself getting old/stretched?
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Old February 23rd, 2015, 08:32 AM
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I get the same problem with my V-belt on my 109. Get a bit of mud on it and the entire thing starts squeeking.

2 hours on the highway solves that problem. Or pull it and clean everything. That is actually probably not a bad idea. Get a fan clutch tool, pull the fan, pull the belt, and inspect everything and clean.
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Old February 23rd, 2015, 09:09 AM
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Originally Posted by Tiktaalik View Post
I've sprayed it generously with belt dressing a few times and it seems to go away for a little while. I'll try water later today.
From everything I've researched, you should NEVER use belt dressing on a serpentine! Many experts say it shouldn't even be sold. All it does is disguise a problem, but it's like adding glue to your dressing, making all kinds of abrasions stick to the belt causing premature wear.

Squealing is usually contamination. hose the belt off. if that doesn't work, then take it off and clean it/soak it and resintall. if that doesn't' work then replace it.

when I am working on my engine now, i take excessive care to make sure oil/coolant does not get on the belt at all, because squealing sux.
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Old February 23rd, 2015, 11:09 AM
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if the squealing changes while you move the steering wheel, then don't overlook the power steering pump. because when the pump starts going out, then that'll squeal like a pack of rabid beagles.
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Old February 23rd, 2015, 01:41 PM
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^ yep
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Old February 23rd, 2015, 01:59 PM
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Originally Posted by ezzzzzzz View Post
^ yep
OMG I can hear that just like it was yesterday....oh wait, it was yesterday
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Old February 23rd, 2015, 02:08 PM
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Ouch. Ok. I won't use that again.

Spraying it with the garden hose made it quiet.

Quote:
Originally Posted by Overlander View Post
From everything I've researched, you should NEVER use belt dressing on a serpentine! Many experts say it shouldn't even be sold. All it does is disguise a problem, but it's like adding glue to your dressing, making all kinds of abrasions stick to the belt causing premature wear. Squealing is usually contamination. hose the belt off. if that doesn't work, then take it off and clean it/soak it and resintall. if that doesn't' work then replace it. when I am working on my engine now, i take excessive care to make sure oil/coolant does not get on the belt at all, because squealing sux.
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Old February 23rd, 2015, 02:09 PM
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So many potential causes. I'll throw in weak tensioner as another one.
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I don't know about the brakes, only their unreliability.
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Old February 23rd, 2015, 02:10 PM
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I doubt it. Isn't that what the tensioner is for? To keep tension? In the past I have flipped the belt the other direction. Is that a no no?

Quote:
Originally Posted by sonoronos View Post
could also be the belt itself getting old/stretched?
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Old February 23rd, 2015, 02:11 PM
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New tensioner assembly and water pump was installed 3 years ago.

Quote:
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So many potential causes. I'll throw in weak tensioner as another one.
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Old February 23rd, 2015, 02:44 PM
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I doubt it. Isn't that what the tensioner is for? To keep tension? In the past I have flipped the belt the other direction. Is that a no no?
reversing the direction of the serpentine often solves the problem when the problem is the belt
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Old February 23rd, 2015, 03:03 PM
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Tensioners do get weak, but three years is plenty young enough.
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Old February 23rd, 2015, 03:56 PM
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just in case you forgot
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