Serpentine Belt Screech

[rhauseriii]

I just replaced the water pump in my 2002 Jeep Wrangler 4.0, right after install it started to make a squealing/screeching noise. I figured it was just wet from coolant and would eventually go away, but it has been a few days and its seeming to get worse. I attached a video of the sound its making. Any idea of what's


causing this?

 

[Jorge Bolivar]

Idle pulley Tensioner or alt bearing.

 

[Rubicon88]

You have a bearing going out on any of the following.
Idler pulley
Alternator
Even the power steering pump pulley is a possible.

Here's a tip...
Spray a little penetrant right on the bearing of the Idler, and any suspected culprit, (Alternator, pwr steering pump)
Not much. Don't spray the belt.

Do 1 at a time. Spray wait 10 seconds. You know when you found it. The sound will change...if only for a few seconds