Worst Belt Noise I've Heard

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bstrang6

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So I bought the truck and noticed that it had a small amount of belt noise while it was idling, but couldn't really hear it much going down the road. It wasn't a constant screaming noise, more of a 'Chirp Chirp Chirp Chirp Chirp' that increased with the idle.

Well It got a bit worse, and finally the alternator actually went out in my truck. So, while I had the alternator out getting bench tested the guy mentioned that the bearing was shot, and it sounded like hell. I thought, SWEET, two birds with one stone eh? Not so much. I put the new alternator on and the truck ran quiet as a church mouse. Drove it home, parked it, and later that evening used my remote start to warm the truck. Once I left the front door I could hear a tremendous CHIRP CHIRP CHIRP CHIRP CHIRP coming from my truck ( 2003 escalade 6.0 w/ 129k miles on it )

So I do some research and come to find that the tensioner is a likely culprit, and I can buy the tensioner pulley for 17 bucks from Oriley's, so I have them holding one for when I get off work. Meanwhile I grab a can of wd40 and spray the belt down, and the noise goes away. It came right back after a short trip home. So while the truck is running and chirping away, I pinpoint the tensioner and hose down the pulley front and back, ( not the belt ) and the noise went away for a few seconds.

Would it be safe to assume this is my culprit? Should I grab a new belt at the same time? Oriley's has just the pulley, not the whole tensioner, should I replace the whole tensioner instead?
 

hotbeek

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i would bet it's the belt...probably have a heatsoaked belt...they tend to get dry and cracked after time..put on a belt and see if it squeaks/chirps...if the bearings in the alternator were going it may have been taking a toll on your belt too...easy enough to change either one right in the parkinglot of O'reilly's...heck the workers would probably do it for ya'

good luck
 
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bstrang6

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Think I may just spring for the belt and tensioner both, hell its going to go out eventually
 

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