Why do I keep tearing up belts???? - Dodge Cummins Diesel Forum
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post #1 of 14 (permalink) Old 02-24-2010, 09:04 PM Thread Starter
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Why do I keep tearing up belts????

I know i'm in the wrong section but i need help. This will be the Third belt i have put on. I replaced the tensioner pulley last week but the belt i left on there had a couple of lips missing and tore another lip off tonight. The belt are coming apart lip by lip and the lip that comes off is always wrapped around the crank pulley between the bolck and the pulley. Could this be my damper going out?


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post #2 of 14 (permalink) Old 02-24-2010, 09:35 PM
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Almost all the time it is the tensioner. Did you just replace the pulley or the entire tensioner? As for your damper as long as the rubber isn't hard cracked and fallin out it should be good to go.

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post #3 of 14 (permalink) Old 02-24-2010, 09:46 PM Thread Starter
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I replaced the entire tensioner

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post #4 of 14 (permalink) Old 02-24-2010, 11:19 PM
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I've seen on an 03 that we changed the tensioner, and he kept eating dayco belts, whent with a gates gatorback and has not had an issue since. have also heard that some times the tensioner my require a small shim under it to keep the belt from being "run" off, although I have no experience with this .

I found the dayco tensioner(square looking plastic pulley) was pretty crappy compared to the gates one (steel wheel)





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post #5 of 14 (permalink) Old 02-25-2010, 12:33 AM
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I replacement my tensioner also with the gates tensioner and mine is doing the same thing. It ate one lip and I pulled it out from around the crank pulley but I did not readjust the belt just left it how it was. I have not had any problems after

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post #6 of 14 (permalink) Old 02-25-2010, 12:38 AM
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A pulley is out of alignment somewhere. Make sure all pulleys are on tight and running on the same plane.

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post #7 of 14 (permalink) Old 02-25-2010, 08:06 AM
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check the idler pulley also....... easily over looked also. this is going to sound dumb but is it the right belt? i had a belt in the wrong cover once

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post #8 of 14 (permalink) Old 02-25-2010, 07:16 PM Thread Starter
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It fits like the right belt. Looked at the crank pulley while running and it seems to wobble a bit, that should be my problem.

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post #9 of 14 (permalink) Old 02-25-2010, 08:01 PM
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Slight wobble on crank should not be a problem. Look at all pulleys while running and see if belt favors the outside or runns in middle. Check for alignment. Sometimes the alternator is installed out of alignment, idler pulley bad, tensioner assemblly allowing belt to run on edge, AC pulley/bearing bad or misinstalled. Water pump bearing loose but not leaking, anything not allowing belts to center themselves on pulleys.

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post #10 of 14 (permalink) Old 01-30-2011, 08:11 PM
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gatorback part number for 2001 with ac?

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post #11 of 14 (permalink) Old 01-30-2011, 10:19 PM
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And check alternator mount for wallowed out mounting hole..

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post #12 of 14 (permalink) Old 01-30-2011, 10:47 PM
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Hey I manage a NAPA and the gates # for the belt is #25081264 or put a HD on the end for the heavy duty fleet runner belt. Also like they said make sure everything is aligned and non of the bearings are failling. P.S. that # was if you have a/c.

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