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Whining noise

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  #1  
Old 07-20-2014, 09:14 PM
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Default Whining noise

I have a 2006 Dodge Ram 2500. Its making a faint whining noise under the hood. Never had any major problems with it. Theres no problems as far as acceleration or anything. Any suggestions?
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  #2  
Old 07-21-2014, 10:07 AM
gcburkett gcburkett is offline
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Does it whine when the truck is stationary or only when moving? Does it change either pitch or loudness with engine speed? After these simple questions other will be able to provide more direction of where to look for the source of the noise.
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Old 07-21-2014, 11:42 AM
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Originally Posted by gcburkett View Post
Does it whine when the truck is stationary or only when moving? Does it change either pitch or loudness with engine speed? After these simple questions other will be able to provide more direction of where to look for the source of the noise.
Its a faint whine while stationary, can barely hear it...when the engine is revd and while accelerating driving, the pitch gets louder.........almost sounds like it has turbo.........or also mimics the whine of the stereo amplifier through the speakers........its definately not that......discon ected all of that to make sure........
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Old 07-21-2014, 11:45 AM
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Default whining noise

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Its a faint whine while stationary, can barely hear it...when the engine is revd and while accelerating driving, the pitch gets louder.........almost sounds like it has turbo.........or also mimics the whine of the stereo amplifier through the speakers........its definately not that......disconnected all of that to make sure........
thats it
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Old 07-21-2014, 02:21 PM
gcburkett gcburkett is offline
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How long as it been since you change your belt? I would investigate the pulley and belt driven accessories
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Old 07-21-2014, 02:35 PM
djbucky3 djbucky3 is offline
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Water pump is also a possible suspect.
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Old 07-21-2014, 02:48 PM
TejasMtnBiker TejasMtnBiker is offline
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mine did that and it was the rear bearing in my alternator, took the alt apart, went down to bearing supply and got a new bearing for less then 10 bucks... this was after I put on new pulley bearings
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Old 07-21-2014, 04:41 PM
cd36c cd36c is offline
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Pull your serpentine belt off and check all pulleys for play, or roughness when turning by hand. If the belt hasn't been replaced in a while, or it looks in rough condition you can try replacing the belt as well.

If you suspect belt, you can run a bar of soap on it while the engine is running, you'll slowly hear the whine go away. It will come back but it can hep diagnose a bad belt.
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Old 07-21-2014, 04:54 PM
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I 2nd the waterpump suspect.Grab the waterpump pulley and see if it has any play/movement.It's better to change that out before it craps out on the highway,and as suggested check all the other belt/pulley accessories.
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Old 07-21-2014, 10:11 PM
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I appreciate all the suggestions and will get to working on all. The belt is still original. Truck just hit 95000 miles. The pulleys seem more logical but all pretty much does need replacing and a good tune up. Thanks again, will post the issue once I find it!
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Old 07-22-2014, 08:18 AM
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If it is original belt at that many miles, that belt is probably shot. I don't usually have belts last that long for me.
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Old 07-22-2014, 10:51 AM
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Ok so I went out and took the belt off and started the engine, no noise. Turned the pulleys, they turn freely and when shook them, the Power steering pump pulley moved. Not moved as in wiggly and dangling but like a small click movement in and out. Not enough to throw the belt off track. The belt is in good condition but as you all said its old and could use a changing. The Fan pulley is nice and sturdy. Now i just have to figure out how to go about removing the front part of the truck like the frame, radiator and fan shroud to get to it easier.
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Old 07-22-2014, 12:17 PM
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That's overkill, go buy a belt first and see if that fixed your problem, at that age it should be replaced as preventative maintenance. If it still makes the noise with the new belt keep digging.

It could also be a defective tensioner as well. Did you check the idler pulleys, do they spin without any roughness? It doesn't take much roughness when spinning by hand to turn into a whine when spinning at 2,000+RPM.
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Old 07-22-2014, 08:03 PM
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Ok cool, one step at a time then. I already scheduled an appt with the dealership so they can use their gadgets to try and pin point it plus there was a recall for the tie rods, gettin that checked too. I say if them tie rods aint broke by now with all the cross country drivin ive done within the last 3 years, it aint gone break!!
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Old 07-28-2014, 09:53 PM
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Default Thanks Guys!!

I changed both the idler pulleys first and it still made the noise but a little fainter than it was. just changed the tension pulley about 30 mins ago and its gone but I think i can still hear it a little but I cant hear it when im driving. Its gone. Dang dealership was gone charge me 390 bucks to do a 10 min job and 80 dollars in parts!!! Rip offs!!!!

Thanks again fellas!
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Old 07-29-2014, 08:55 AM
djbucky3 djbucky3 is offline
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Quote:
Originally Posted by jacks187 View Post
I changed both the idler pulleys first and it still made the noise but a little fainter than it was. just changed the tension pulley about 30 mins ago and its gone but I think i can still hear it a little but I cant hear it when im driving. Its gone. Dang dealership was gone charge me 390 bucks to do a 10 min job and 80 dollars in parts!!! Rip offs!!!!

Thanks again fellas!
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Old 07-29-2014, 11:22 AM
TejasMtnBiker TejasMtnBiker is offline
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patience paid off again =)
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Old 07-29-2014, 11:22 AM
 
 
 
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