One of my pullies while running just continuously squeeks. Just wondering how do you stop this?

I'm going to have my car jacked up and the belt off so I can try and find exactly which one it is. If I do.. do you have to replace the pully? What if it still spins nice and loose but is just squeeky? Is this a job for WD-40?

Thanks guys! Just wondering because the car will be in the air anyway because I'm changing oil and tracking down a damn exhaust rattle somewhere.

 

WD 40 is not the answer! Sounds like you need to replace the pully / bearing. Usually under $10 and any decent parts store. Take your old one in for a match up.

 

Also should check your belt, if its old and worn it might be the belt squeeking. Although it sounds like your pretty sure it is the pully...

 

Alright, thanks guys! I'm pretty sure it's a pully. My belt is in pretty good condition. And the noise seems to get louder/worse when the AC compressor cycles on. So I'm going to start there tomorrow.