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Old 03-15-2012, 09:22 AM   #1
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95 YJ eats every serpentine belt i put on

i bought my jeep about 2 years ago and i had a squeaking belt that always loosened up on me every 6 months or so... so ive decided to buy a new one, heh, i'm on my 3rd belt now in 1 month, i went through two duralast and now the dayco i bought 2 weeks ago got chewed up as well. well it doesnt get chewed up so bad as to a snapping point, but it does chew up the last inner ridge... engine side if you know what I mean. can it be one of the pulleys? itll run good for a week or two, but then the same thing happenes ridge gets chewed up... and im on my 3rd belt. i dont have an ac compressor and i do buy the correct belts. maybe i put em on to tight... i usually leave about 3/4" slack. can anyone help me out?

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Old 03-15-2012, 09:29 AM   #2
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1) I'm not sure what its supposed to be, but I think that might be too loose.
2) check all your pulleys or anywhere else the belt touches for any kind of sharp edge.
3) look at your engine from the side, and visually check to make sure all the pulleys are inline with each other. I was working on an old VW and one of the pulleys was about 1/4-1/2 an inch farther out than the other one. The belt lasted about 40 minutes before it shreded...

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Old 03-15-2012, 09:31 AM   #3
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Never experienced that..... but I would suspect a pulley misalignment issue. Can you get a straight edge in there to see if you have a wobble or a bent edge???
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Old 03-15-2012, 09:35 AM   #4
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Both mine and my brothers do shred the one tooth belt or whatever it is I looked at mine noticed my power steering is a little out of alignment. But I just let it go I have a spare just in case tho haha
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Old 03-15-2012, 10:09 AM   #5
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The harmonic balancer shredded two belts on my XJ before I got it (and the PS pump/pulley) fixed.
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Old 03-15-2012, 10:01 PM   #6
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It sounds like one (or more) of the pulleys are out of line. Look to see if one of them is real shiney or looks polished. That is probably the problem
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Old 03-15-2012, 10:20 PM   #7
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Quote:
Originally Posted by d5string View Post
It sounds like one (or more) of the pulleys are out of line. Look to see if one of them is real shiney or looks polished. That is probably the problem
^ This.
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Old 03-15-2012, 10:24 PM   #8
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it is most likely the power steering pulley, it seems to have the sharpest edge and is the easiest to get out of alignment
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Old 03-18-2012, 07:07 AM   #9
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i quit buying belts from autozone & advance,car quest sells one with kevlar in it,that cured my squeke
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Old 03-18-2012, 07:25 AM   #10
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If your Power Steering pump pully is out of alignment it will chew belts.
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Old 07-31-2012, 11:36 AM   #11
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dayco belt

I do not know about the Duralast but the Dayco belts are literally too wide. I went through virtually the same thing... went through three before going to Napa... no more shredding! I still have to adjust the belt every couple of weeks though
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Old 07-31-2012, 12:58 PM   #12
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i have to adjust mine also because it loosens up after a few weeks. and whats sucks on mine is it is a huge pain in the ass to get on since my block is a 99, my alt is an 87, and my waterpump is an 89. mine never chews up the blets but they just don;t stay tight and since i have the old style adjust the alternator to tighten the belt set up, i put a pry bar between the alt and the ac mount and yank it tight and it still comes loose.

as long as i don;t have the ac on when i start the jeep though, it doesn;t squeek
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Old 07-31-2012, 05:18 PM   #13
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belt loosening

If the belt is loosening it has to be one of 2 problems. Either the belt is stretching or the tightener is loosening. If the belt is stretching it is too tight. BUT then it should stretch to be right and never stretch to be too lose. Physics thing.

So, the thought is that the tightener is not staying put. If it is the alternator, then check and see if you can double bolt the slide mechanism. If there is an area of the slot open on the tightening side you can put a bolt/nut on that and use it to block the alternator from sliding/slipping loser.

You don't want to tighten the belt too tight or you will take out the bearings, usually the bushing in the water pump.

Also, check and be sure you don't have the wrong width belt. Probably a 1/2" but worth checking.
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Old 07-31-2012, 06:16 PM   #14
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Mine done the same thing.one of my idler pulleys would lock up when it got hot and would burn it into.it took me forever to find it.after the 3rd belt come off I checked every pull for sharp edges with no luck.I spun one of my idler pulleys and it made a sound.when I took it off a couple of bearings where missing and after it got hot it would seize up and slowly eat the belt off.
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Old 08-01-2012, 07:59 AM   #15
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wierd things happen

Isn't mechanics fun?

If you have a 6 groove serpentine (which I believe it is) you might try a 5 groove, same lenght and leave the groove closest to the engine empty.
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Old 08-01-2012, 08:03 AM   #16
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I had the same problem after I replaced my steering pump. My steering pump pulley was 1/4" out further than the rest. I took it to my mechanic to see if he had some special tool to move it and he did. Free of charge.
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Old 08-03-2012, 04:27 PM   #17
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After inspecting it turned off for worn [shiny] spots on belts, look for things that could be touching the belt; I had a friend who went through two before he realized the sharp end of a lower hose clamp was up against it. With a flashlight - and minding all the moving bits - watch it while it's running, looking for any imbalance or stuck pulleys. And double-check the deflection: 3/4 inch seems like to much to me, too, but I'm not looking at it, either.

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