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What would cause a fan pulley to bounce back and forth while running on an 01 ram 2500?

Everything is tight and the fan spins less than one and a quarter rotation by hand like it is supposed to. While running the pulley bounces back and forth and makes a screeching sound when the pulley bounces off the back. When i grab the fan and try to move it back and forth by hand it does not move but as soon as the engine starts it just starts bouncing. Could it be the fan clutch or the water pump? It doesn't over heat or get excessively hot.

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Take off the belt & feel for the water pump bearing

Posted on Nov 28, 2012

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Posted on Jan 02, 2017

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SOURCE: is bouncing back and forth

If it's cable driven replace the speedo cable it will be binding up

Posted on Jan 27, 2010

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SOURCE: The pulley on the power steering pump slides back

The bolts on the front of mounting bracket are loose they thread into the pump and hold it tight against the bracket. There is also an adjustment depending on what engine you have there will be a bolt or a stud with a nut on it on the top of the pump bracket this how the belt is adjusted you want about an inch of up and down play in the belt then tighten the bolts there around the pulley looking at it from the front i think there is 3 of them they will be in slots in the bracket so they can slide to remove the belt from the pump.

Posted on Jan 17, 2011

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1 Answer

What would cause my a/c comp to cycle rapidly at idle it also causes my temp gauge to bounce back & forth


A low refrigerant charge would cause rapid compressor cycling. If your engine temp is rising with AC, check to make sure the AC radiator fan is running when AC is on

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I have a 93 k2500 5.7 gas Chevy cheyenne that was squealing so we changed the tenssioner and pulley then changed the idler pulley along with the belt so far it has threw three belts and shredding them like...


The tensioner pulley moves back and forth to keep belt tight..the idle pulley just sits there and spins..none should have play at bearing. If u misplaced a washer/spacer it could cause the misaligned issue that is shredding belt..

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HOW DO YOU TENSION UP THE FAN BELT ON A 01 1,4 FIESTA


loosen the bolts on the alternator and useing a long bar pull the alternator away from the block untl the belt on the longest run between pulleys has no more or less than 1/2"play,then do up the alt bolts,and check that the belt is not too tight or too loose.

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What would cause 01 ram 2500 v8 to sputter and


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I have a 2007 ram 1500 and it looks the water pump is leaking.How can I tell if this is the problem?Everything under the hood is wet from splatter.


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2006 Dodge Ram 2500, A/C blows hot at idle & blows cold at highway speed, has new compressor, any solutions?


i had the same problem in my 2003 Durango!!
turns out the auxiliary fan was not working!!
that fan should run all the time when the a/c is on!!
so start the truck, turn the a/c on and then go look at the aux fan (the plastic electric one attached to the radiator) and make sure it is spinning!!

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1 Answer

Auxiliary fan


I think there are two fan switches on the 99 but I don't recall for sure. At some point during the B5 chassis run (96-01) they went from two two-wire switches to a single integrated switch. It's possible that you have the two switch design and only changed one of them. Also, your fan clutch could be shot. If you spin the fan, it should spin one revolution or less and then stop. If it spins freely the clutch is shot and needs replacement.

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