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TJ "Squealing" Noise from front fan area - Video

4K views 16 replies 11 participants last post by  tj04 
#1 ·
I have a 2002 Jeep wrangler x 4.0 112K miles, manual. When I start my engine I get this odd noise which I call "squealing" from the front area near the fan. I can't tell where its coming from or whats causing it. Jeep runs fine otherwise and it happens mainly when its cold outside.

Any assistance of what this might be would be greatly appreciated. Ive included a small link with video of engine and noise.

https://www.dropbox.com/s/6gw48j0fnz1x75u/IMG_0384.MOV

Thanks
 
#6 ·
15 minute job and allies silent again. Once pulleys were off you could spin the old ones in your hand and feel as well as hear the grit in the old bearings.
I did have to go return the idler pulley and swap out for a Dorman unit as the first on would not seat properly.
 
#15 ·
I just replaced my tentioner pully with one from autozone. It was about 12.00 bucks. There are two that pop up for the 1997 4.0, yours maybe different... One pulley is small the other is bigger in there system, you will need the bigger one. I bought both and matched them to the old tentioner pulley, it was the bigger one, which is cheaper!
 
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