Alternator Whine?

click said:

Today I was stopped and i heard a whine that kinda sounds like metal grinding. And it got worse as the day went on. I hear all the way into the interior of the car. It comes up through the shifter boot. I popped the hood and it sounds like its come from the alternator pulley or inside the alternator. Is this common? Would that be bad alternator bearing/seals?

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HISSIN50 said:

If you can, grab a mechanic's stethoscope. For instance, I have a whine from my smog pump. It uses an eccentric plane of rotation and the vanes can hit the walls of the housing, causing noise.

Otherwise noise resonates through other components - even with a scope it can be hard to narrow noises down.

Good luck.

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