Squeaking noise coming from middle of motor?

[blackout51]

So I just started my truck up this morning and heard a weird squeaking/chirping type of noise coming from the middle of the motor, kind of near the water pump and crank pulley but it didn't sound like the water pump and besides I just replaced the water pump anyways, I just didn't know if the crank pulley or harmonic balancer could make this type of noise and I didn't know if this could be a part of this rough idle I have been dealing with also

 

[RayVoy]

Really hard to tell where that kind of noise is coming from; with the aluminum engine blocks, it telegraphs from one area to a near by area very easily.

It is probably one of the belt pulleys, like the idler, or the tensioner. It could just be the belt.

 

[jrSS]

Belt +1

 

[dfc739]

Could also be the alternator. My alternator bearings squeak a little when cold. I found it by taking off the belt and spinning each pulley on the drive belt assembly with my fingers.

 

[blackout51]

Really hard to tell where that kind of noise is coming from; with the aluminum engine blocks, it telegraphs from one area to a near by area very easily.

It is probably one of the belt pulleys, like the idler, or the tensioner. It could just be the belt.

Well I just changed the tensioner pulley so maybe ill do the idler tomorrow