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Unread 04-03-2012, 07:30 PM   #1
jdupray
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help please

i have put three serpenting belts on my 2003 jeep wrangler se. i have replaced the tensioner pullie and 2 of the idler no slack pullies but it keeps shredding the belt. it runs fine. has all the power but when it sits and then gets started. within 5 mins the belt shredds. can anyone help me i have spent enough money on this and just want it fixed

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Unread 04-03-2012, 07:35 PM   #2
cheapjeep06
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Sounds like a pulley is either bent or out of line with the rest. Saw this on the ex's minivan...kept shredding the belts.

Remove the belt, then stand to the side to see if you can tell which pulley is off. Staight piece of metal will help. Or the belts weren't installed completely on the crank pulley(easiest one to not get on right), which will chew up and spit out the belt.
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Unread 04-03-2012, 07:37 PM   #3
2jhanna
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Quote:
Originally Posted by jdupray View Post
i have put three serpenting belts on my 2003 jeep wrangler se. i have replaced the tensioner pullie and 2 of the idler no slack pullies but it keeps shredding the belt. it runs fine. has all the power but when it sits and then gets started. within 5 mins the belt shredds. can anyone help me i have spent enough money on this and just want it fixed
are you saying that if the vehicle sits for a while and is then started, then the belt shreds ?

have you checked the alignment of the other pulleys ? is 1 pulley sticking out or further in than the rest ?
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Unread 04-03-2012, 07:39 PM   #4
jdupray
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it slides around on the tensioner pully. it will come out far enough to hang off the pully and rub on the tensioner itself
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Unread 04-03-2012, 07:40 PM   #5
jdupray
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it will run for a while then the next morning when it is started within 20 mins of driving it shreds
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Unread 04-03-2012, 07:42 PM   #6
cheapjeep06
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Forgot to tell you to try to turn every pulley by hand after you take off the belt...perhaps the a/c or power steering pump pulley is dragging or has bad bearings.

Is there a crack in the fan pulley? (shot in the dark)
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Rustys blows big, fat camel nuts.
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Unread 04-03-2012, 07:48 PM   #7
cheapjeep06
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OK, just read your post about moving on the tensioner. Sounds like something is not lined up right. I see this at work all the time when pulley are not lined up perfectly. The ribs try to hold the belt in place, but the tensioner, idler, and waterpump/fan pulley are smooth and run off the "back" of the belt.
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Unread 04-03-2012, 07:54 PM   #8
jdupray
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how can i tell which pully is out of line?
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Unread 04-03-2012, 07:54 PM   #9
2jhanna
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sounds like the idler (or bracket) is not perpendicular. meaning that the pulley surface is at an angle.
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Unread 04-03-2012, 07:55 PM   #10
jdupray
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it runs for a while. i have driven it for 30 miles no bad sounds or anything. then i just started it to run to the store and within 10 miles it shredded the belt
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Unread 04-03-2012, 09:06 PM   #11
JPNinPA
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Unread 04-03-2012, 09:44 PM   #12
mg2380
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Same thing was happening to me. Turned out I left a box of open razors and Christmas ornaments in my engine compartment.
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belt , help needed , please help , serpentine belt

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