New noise upon start up

[ksbronco75]

In the processing of essentially breaking in my bronco. After 5-10 years of putting stuff on and chasing gremlins I’m getting closer to less gremlins. But last weekend a new one popped up. When I turn the engine on it sounds like a bearing is going out on something. My assumption is something with a pulley ad it sounds like it’s in rotation. Kind of a light squeaking wheel noise. It changes speeds as the rpms change. So I’m thinking P/s pump, alternator maybe? I feel it favors the drivers side, but the more I listen I honestly don’t know. Any ideas what it could be or how I could check them without straight replacing them?

 

[Apogee]

Do you have as mechanic's stethoscope? They can come in handy when trying to find the location of something like an errant squeak.

 

[Rustytruck]

take off on belt and test it when the squeak goes away you will find where the problem lies. if you have any idler pulleys suspect them first.

 

[SHX669]

Sometimes spray on " belt dressing " stops the noise but it also can help locate a worn pulley or belt.

 

[ksbronco75]

I’ve never had a good ear for the stethoscope. I’ve been under it a few different times this morning and it seems like drivers side but hell I honestly can’t tell. Took off alternator belt, wasn’t that. P/s has a ac condenser on it as well so I haven’t gotten that off yet. Chasing new gremlins every time something else gets fixed it quite annoying