A new noise from motor 2003 Base

[VibeTronic]

Im trying to figure out a new noise im starting to hear from my car...(its like a squeak an maybe a little rattle from somewhere around the motor bay but i only here it when the car is stopped or in park..the last time i heard a noise it was the belt tensioner..an that ended up costing me a total of $150.00 to replace..but im sure it cant be the same thing again already since i changed it back at 89,000 miles...give me your honest opinions.of what you think..(oh btw one guy told me cause i never changed my alternator yet it may be that squeaking but im not sure...

[Kamikaze]

when you rev the motor while in park or stopped can you still hear the squeek? (I'm talking reving the motor from the engine bay, not while sitting in the car) It could be the bearings in the Alternator.It could be a belt, if the tensioner isn't tight enough. I'm sure it could be other things, but at least this would be a start.

[VibeTronic]

only does it at idle..

[ToolGuy]

Your belt? How new is your belt? I assume when you got the new tensioner you got a new belt but how long ago was the belt put on the car? Open the hood, in Park, you stand in front of the car and have someone else give the car gas, you listen for the noise... Yes it could be your alternator bearings.