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Most of the advice in this thread has been good. Silicone, or soap ect for temporary fixes. As was pointed out though, if the belt is squealing, there is a reason for it.
One problem that maybe needs a little more attention is the bad pulley.
BadDog started on this but there is more. Over the years, I've tried just about everything mentioned - grease, oil, armor all, wire brushes, greased pulley bearings, belt conditioner, shimming accessories - on different cars of course.
One problem I had with a loud belt was really getting to me. I'd put on a Goodyear Gatorback (the best in my book) and checked everything to make sure it was straight ect. Well it turns out that on my Volvo with 250k miles on it, that the grooves on the crank pulley were worn out. It didn't wobble or anything, and the metal ridges looked plenty tall. The problem was that the ridges were worn in such a way that they were too narrow. That allowed the belt to "bottom out" against the crank pulley. Though that doesn't seem like it would cause a problem (because look how much contact area you have) let me tell you it can.
As you can see in this picture, proper fitment doesn't allow the belt to bottom out.
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1999 Saab 9-5 sedan 2.3t 5speed
2013 prius 3
Quote:
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