Drive Belt pulley going bad?

[The Viper]

In the morning on 1st startup and for the 1st 15 minutes of driving there is a loud screeching noise coming from the drive belt area. Im assuming one of the pulleys is going bad. The belt was replaced with a Dayco one a couple months ago

I have 2 questions...

1) its hard to determine which pulley, has anyone had one of their drive pulleys go, which is the most common to go?

2)anyone know the part numbers for the 2 pulleys (the top left one, grooved and top right one smooth)? I looked on rock auto and they have what looks like the grooved one (passenger), but the smooth one (driver side) thats listed, is stated as for a foreign nameplate import vehicle???

Here is a link to a video of the noise at 1st startup this morning and pics of the two pulleys

https://youtu.be/qPRwjdC6k4U

 

[jeep-N-montero]

How old is the alternator?

 

[The Viper]

I have no idea

 

[jasonsuperb]

I just ordered this to replace the smooth idler pulley, mine was rattling and would wiggle side to side if pushed on, you could even see it wobble when spinning.

http://shop.advanceautoparts.com/p/...lley-89177/10126898-P?searchTerm=idler+pulley

 

[The Viper]

Any chance this noise could be coming from the water pump going bad?

im going look into this issue a little deeper tomorrow morning

 

[eviioiive]

pull the belt and feel for play. i have a few on my car that look exactly the same but one had waay more play in it. replaced it and the noise was gone

 

[plh]

I replaced all of these on my '05 (and '92 & '93 - bearings only - serviceable) really quieted the engine down.

2)anyone know the part numbers for the 2 pulleys (the top left one, grooved and top right one smooth)?

Grab ASA from Mitsubishilinks.com (and donate a little to the host) and you can find the part number.

 

[The Viper]

I mightve found the culprit, let me know if this is a strong possibility...

I noticed a very small coolant leak coming from the upper radiator hose (where the rad meets the hose), the upper rad hose seemed to be cut to fit and the c-clamp needed tightening. I think the coolant was dripping down and then getting sprayed onto the belt. I noticed the top of the belt had a sticky residue (which im assuming is from the coolant) on it. when i sprayed water on the top of the belt with the engine running the noise went away momentarily. I replaced the clamp and tigtened it down pretty good. Hopefully this will over time (one week?) will fix things as the residue should grind off. If not, Ill replace the belt.