Dayco Poly Rib Belt Serpentine Belt; 96.85 Long, 6 Rib Count

Installed in 1999 Chrysler T&C with 150K mi. Initially thought I had a bad steering pump/pulley following a line rupture. Visual inspection of the belt didn't show any significant wear/cracking, but decided to try a belt replacement before attempting to replace the steering pump/pulley. Removing the old belt was relatively easy despite a very stiff tension pulley. With only a little pull on the tension pulley, I was able to slip the old belt off the alternator pulley, then thread it off the other pulleys. Installation was quite a bit more difficult as the tension pulley recedes quite far back/down once the belt is removed. Due to bends in the new belt (from packaging), this made it hard to keep it on the other pulleys while simultaneously a) pulling the tension pulley into place and b) attempting to slip the belt onto the alternator pulley at the back of the motor. Once finally installed, I was extremely pleased to find that the squeal had disappeared. Obviously, the long-term durability of the belt won't be known for awhile, but I'm happy with this purchase/repair so far.

This serpentine belt is slightly undersized than the original size. When installed, then engine started, it erratically moves from side to side. Even after replacing the belt tensioner, and the idler wheel, it still does the same thing. The belt tensioner is forced upwards too much causing the tensioner to vibrate too much, in turn this causes the belt to move erratically from side to side to a point that it almost falls off. And this alone happens when it is just in park position. Imagine when driving the vehicle! I had to put the old serpentine belt back on. Properly made replacement belts should be able to fit exactly like the original part. I can't understand why this belt was not made exactly like the original part.