Let's play the guessing game!

[Charged4Door]

My 2007 GT has developed a whine, passenger side of engine. Car has 100k miles.
Power steering pump? fluid full, no leaks.
Alternator? correct voltage, no weird electrical problems going on.
Water pump? fluid full, no leaks

the car only starts to whine after car has been driven awhile. it does it going straight, turning, but only under some load.
when coasting and at idle you can turn wheel back and forth and here nothing. give it a little gas while coasting and at idle and it whines.
i originally thought power steering pump, but no noise turning while coasting and at idle cutting wheels kinda threw me a curve.
i am thinking alternator bearings? Will a water pump whine like that?
just want some opinions before i start slinging parts at it. Thanks

[theaceofspades]

My 06 has a slight whine too at 72k I'm pretty sure the power steering pump
Fluid needs changed it gets burnt and worn out and loess viscosity

[Scottydoggs]

take the belts off and spin all the pulleys by hand. one may be shot and whining or something.

[02NavyBlue]

If turning the wheel has 0 effect under all conditions its most likely not the pump. A true whine is usually a tensioner pulley bearing or something. Fastest way to check is to get under the hood and with a long pry bar or stethoscope, touch it to each component and put your ear to it and listen where it's the loudest
http://s760.photobucket.com/user/com...ioner.mp4.html
That was our impala with a noisy tensioner pulley bearing

[Charged4Door]

Sitting running at idle you can't hear anything. Rev the motor just a little bit and it whines. The whining sounds just like a power steering pump, but I think it's coming from alternator. Guess I'll just drive it till it dies completely.

[Scottydoggs]

now thats a solid plan^^^^^

[02NavyBlue]

Well you need a helper since series 3's are electronic tb

[Charged4Door]

02 navy blue. Don't understand your comment

[02NavyBlue]

Well you said sitting and idling doesn't do it...so I said go under the hood. Being you have a series III, you cannot rev it while under the hood which makes my procedure impossible with one person. Therefore you need a helper to hit the gas while you listen. But you could put something on the pedal to kind of get the same result

[tomtom123]

Well you need a helper since series 3's are electronic tb

He's saying that the series 3 3800's weren't drive by wire. They were an electronic throttle body. The older cars you could rev under the hood but you can't with the series 3 3800's

[Charged4Door]

Is it normal for the volts to creep down to 12.6, 12.7, then creep back to 13.9 every once in a while

[Slick2500]

Depends, do you have an aftermarket stereo or anything like that? If you can try to get a video of this noise.

[Charged4Door]

Just have a pioneer touch screen head unit.

[Charged4Door]

Could get a video, just wouldn't know how to post it lol