1996 Jeep GC I6 4.0.

Just had a new serpentine belt put on about a week or so ago and it squeals on occasion. However, it is usually right before I get out the parking lot to go home at night. Ironically, not at all in the morning after sitting in the driveway all night.

When I try to look at it at home, it just doesn't do it....

Anyway, I'm not much for belt dressing, so should I tighten or loosen it to reduce the squeal? And how much? Just keep tweaking it until it stops???

Bryan

The belt tensioner on the 4.0L's suck, because they are not self-adjusting. Yes, you will have to continue to adjust the belt tighter, because the belt will stretch a little after it is installed. Be careful not to tighten too much!!! I have actually seen the power steering pully get cocked inward from over-tightening on these engines. Step to the driver's fender and eyeball all the pulley's to make sure the power steering pulley is in-line with the others. If not, you may have to back off the tension a bit.

Hope this helps!!!

You're right that the 4.0L has a terrible system. My belt would queal under these conditions:
-Turning Corners
-With the air/heat/fan turned on

I replaced the belt and that solved the problem for a day or two, but the quealing is back. Is it possible that there is a problem with a sticky compressor clutch? Thanks for the great forum!

I can almost guarantee you have a idler pully squeeking. There are two on a 4.o L.