204cherokee

Hey im still new to the cherokee world.
here's my problem. I just change the idler pulley. But i still have a high pitch noise coming from the front end of my engine. I'm guessing its one of my pulleys but don't know which one. I have a new belt on there. So im outta ideas on what it could be. So just wondering if anyone has come across this problem before. I have a 91 cherokee laredo 4.0L

Savasa

Hiya 204,
Maybe the alternator. I've had bearings go bad and they do scream.
Peter

BudgetXJ

You can usually figure out where its coming from by using a long extension or screw driver like a stethoscope. Put whichever it is you choose to use against your ear and CAREFULLY touch it to areas around the pulleys being careful not to get too close to moving parts. I have used this method effectively many times. HTH.

Jesse James

X 2 on the alternator. mine just started to go about a month ago. check if you have any draw on the battery and if you do try turnin things off.. if the whine goes away its ur alternator. If i put too much draw on the battery now, the battery guage drops and it starts to squeal until i get the rpms up and it reaches normal operating area. I've been waiting for some warmer weather to change it out.

HTH

Jesse J.