I have a 92 2 wheel drive with air ,the serpentine belt keeps riding up on the ac compressor pulley ,,,as I see it there is no way to align anything ,they all attatch to the engine with no adjustments ,,,I just bought this truck and did the kdp check and noticed that the old belt was missing one of the groves around the belt so I thought I would replace it ,,I've checked for alignmentand if anything I would have to say the ac unit looks out of line ....anybody got any Ideas??????

 

It could be that your tensioner pulley is shot. I know mine and several others had the belt riding 2/3rds of the pulley, thats usually a sign. BUt it shouldnt be your AC compressor, to be that that out whack that its riding out of the grooves means something is seriously misaligned.

 

Yes, that is the classic symptom of a bad tensioner. Buy a new one.

 

Checked the tentioner ,seemed ok ,,,rolled smooth,,,,

 

My fan mount was cracked and would let the bearing and pulley move out of alingment. You may want to pull the fan and shroud so you can get a good look at everything.
TOMMY

 

my brother 97 ctd did that it was the ac pulley and the waterpump pulley and the tensioner. all better now.

 

It's not the roller that's bad. There is a plastic bushing that the moving piece rides on, which wears. The movable arm twists and throws the belt out of alignment.

 

Slide under truck and sight across the balancer to tensioner. If the bushin is
bad you will be able to see it.
GW

 

It is probably the idler but when mine would not line up it was a really, really bad alternator bearing that threw everything out of alignment. The idler jumped around a fair bit because of it. I put on another alternator and for the first time since I owned the truck the belt looked like the engine wasn't running. I found the cheapest idler locally at Cummins but I now know that they can be had for less at more ordinary parts outfits. Dodge wanted double the price that Cummins charged.

Also, the AC bearing can go bad. The good news is that any bearing from a similar AC compressor will fit. Most Mopars of that era have a similar compressor. The difference is that a flange on the casing is missing on the Cummins. Two minutes with a grinder makes them the same. They cost $10 bucks at my favorite pick a part outfit. You will need the piping and flanges from your old one because the Cummins ones come off at an odd angle.

A lot of people carry a non-AC serpentine belt in case the Compressor bearing quits.

 

Like others have said. The pivot point on the tensioner is probably worn out. Buy a new one.

 

Yup buy a new tensioner assembly

 

I replaced the tensioner today and all is well ,,,the roller was worn ,but also the tensioner was worn so it tilted to one side ,,,thanks for the help..... rook440

 

The belt on my truck has been riding up on the a/c pulley for years. I just drive it and don't worry about it. Funny thing is, is that it didn't start until I put on a new tensioner. I tried another new tensioner, and another new belt but it still doesn't track right.