Here's the dilemma. I own a 2003 4Runner. A year after purchasing the car, the serpentine belt began squealing. I took it to a Toyota Dealership in the area who replaced the belt and mentioned something about a "belt defect". Two years later (~3 months ago), the belt began squealing again. So I went to Napa and got an aftermarket belt and put it on myself. . Now three months after putting on another ?new? belt, the thing is squealing like a banshee again (Each time I put a new belt on, the squealing always goes away?but only for a while). So today I took it too a repair shop and say ?the belt is the symptom but there is some underlying problem causing the belts to wear out and squeal?. They call back and say ?the belt is problem, we put water on the belt and it stopped squealing so we know it isn?t a pulley.? I tell them that there is a reason why the belt keeps wearing out and start squealing but they seem to be at the end of their diagnostic ability so I give up.
Here are my hypothesis and questions:
1.) A pulley is slightly out of alignment causing the belt to wear unevenly. Where do I go to have this checked?do they need a laser to check pulley alignments?
2.) The AC unit (or other unit?) is pulling too hard and causing the belts to wear out. Who would know how to check this?
3.) The belt tensioner is not tight enough causing the belt to start squealing once it has a little wear. How do I check this, with a torque wrench?
4.) Something else is causing my belts to wear out and I have no idea where to look. Who could help?
By the way, I called the Toyota dealership today that I took it to a few years ago and they said ?we have no idea but we haven?t heard of any of the problems you are speaking of?. Any suggestions would be greatly appreciated!! Thanks,
defect". Two years later, the belt begins squaling again. So