Thread: Loud whine in engine bay

Originally Posted by OZZY1123

It's on the belt with supercharger on it. One idler is a bit loose and wobbly and the other has a chip out of it. am I right in suspecting the wobbly one? Where's my best bet to buy a new one?

Usually the 3 inch pulley goes bad and the 3.5 is ok. After replacing the 3 inch one 3 times, I changed both of mine to the 3.5 and haven't had to change them since. It's a tight fit, but makes the belt a bit tighter too so it doesn't slip on the supercharger. I get mine from Rockauto if you can wait, or any of the parts stores if you need it then. I've had better luck with the metal pulleys than the plastic ones.