Something's squealing Options

[senick]

I'm guessing this is an alternator issue. I just noticed a high pitched squeal from the engine bay on my way home coming off the highway. I know it's not the brakes because the noise persists even when stopped. I had the blower off too, so no a/c belts were running. I dress the belts regularly anyway so I don't think it's that.
Could this be a sign of an alternator that's about to go? I'll get it tested but was just wondering what you guys think the noise could be.

EDIT: I forgot to mention that this noise goes away when I get above 40mph.

This post has been edited by senick: Jun 1, 2011 - 4:28 PM

[delusionz]

the belt thats squeeking is most likely too tight, it's probably the alternator one, can you see the tensioner bolt, you either tighten or undo it to loosen the belt a little i cant remember which but you'll figure it out.

when the alternator belt is done up it should have exactly enough free play for the belt to be twisted 90 degrees, no more, no less.

also you dont need to regularly spay you belts with silicone, they should be on at the correct tightness to function correctly and not squeel. dirt and crap from the road sticks to silicone, you dont want dirt stuck to your belts