Belt Noise

[stlguy]

I replaced the serpentine belt and the tensioner on my 2000 Explorer Sport. I've still got belt noise when accelerating. Any suggestions or thoughts?

 

[SmoothJimmy]

the bearings on any of the pulleys involved may go bad. Some guys squirt some penetrating lube into one at a time until the sound goes away. Then they know the culprit. I had one go bad and so replaced them all (the bearings on a 5.0's pulleys are all available aftermarket cheap---10x for $25 on Amazon). Not sure about the 4.0.

 

[stlguy]

Thanks. I ended up replacing the idler pulley and that cured it.