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Unread 04-19-2013, 02:15 PM   #1
Rproject
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After engine clean - nasty belt/pulley sound

I went off roading a week or so ago and got the engine completely soaked with heavy mud. Washed down the engine bay, then dried out the plug wires, cap, rotor and distributor and now I've got this nasty sound from one of my belts/pulleys. I *think* it's from the power steering pulley, but I can't be sure. I have hit the belts with A TOUCH of WD-40 and there was no change in the sound. Yes, I hear the minor squeal from one of the belts, but that's not the sound I'm talking about. It's that God awful "rock inside a rolling tire" sound that's got me stumped.


Anybody have any ideas for me on what it could be? The sound was not there before I washed the engine bay.



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Unread 04-19-2013, 02:35 PM   #2
UZI4U
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The WD-40 is the last thing you want to put on a belt. Sounds like you might be due for a new one anyway. Hose it down again and then try a new belt. Clean the pulleys with some carb cleaner prior to installing to get them and you should be good to go.
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Unread 04-20-2013, 10:14 AM   #3
Rproject
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Well, the Wrangler let me know this morning what the problem was. Water pump. Completely took a puke about 1 mile from the house. Thankfully I was heading home instead of away.

As for spraying belts with WD-40, a LITTLE spray is fine. A heavy spray is really bad. My mechanic buddy, who is an ASE master mechanic but very busy and best used for phone support, told me about the trick to spray just a touch on the belts and see if the sound changes. If it does, it's a belt. If it doesn't, it's a pulley. He was right -- again.
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Unread 04-20-2013, 01:32 PM   #4
Mark05059
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I still wouldnt use wd-40. I would use carb clean or brake clean because they evaporate and dont lubricate. Drive belts and lubrication dont mix at all.
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Unread 04-20-2013, 01:49 PM   #5
Chrisnvegas
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There is stuff called "belt dressing". It comes in a spray can and is either a lubricant, or another kind helps belt to grip.

I am not a fan of this though. It only tends to cover up belt problems such as a loose or worn out belt. I have used it in the past when I was in a hurry and needed the belt to shut up for a couple weeks.

Good luck with the water pump.
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Unread 04-20-2013, 02:21 PM   #6
caoboy
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Did it make a squeal that would go away? There is too much other engine noise for me to pinpoint what you are talking about. I have an intermittent squeal when cold that will go away after a few minutes of driving. I'm wondering if I'll find out sooner than later what it is, like you did
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Unread 04-20-2013, 03:41 PM   #7
Rproject
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Purr little kitty. Purrrrrrrrrrrrrrrrrr

New water pump installed. Weird noises gone.


Hey caoboy - a squeal that goes away shortly after warming up could simply mean that you're low on power steering fluid. Have you checked it lately?
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Unread 04-21-2013, 09:43 AM   #8
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Unfortunately I don't have power steering.
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Unread 04-21-2013, 10:19 AM   #9
Mark05059
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if you read a can of belt dressing... it says do not use on serpentine belts..
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/l , [____],
|---L--[]lllllll[]-
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Unread 04-21-2013, 10:20 AM   #10
Rproject
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Quote:
Originally Posted by Mark05059 View Post
if you read a can of belt dressing... it says do not use on serpentine belts..
Luckily I have v-belts.
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