Hi Ned,
One or more bad diodes in the alternator is the usual cause of whine. It
can put more than the usual load on the alternator also. It wouldn't
hurt to have it checked.
Dave Russell
BN2
Ned Smith wrote:
>
> I have installed a new alternator. Originally I got a high pitched
> whine from that end of the engine compartment after the motor had
> been running for about 30 sec. I put a straight edge across the alt.
> pulley and saw the drive pulley and the alt. pulley were misaligned
> by a small amount. I have corrected that by judiciously placing
> washers here and there. Now there is no sound at speeds up to about
> 2500 RPM. Above that, the whine comes back. And the alt. pulley is
> hot. It may have always been hot and I never noticed.
>
>
>
> I would appreciate you insights.
>
>
>
> Ned Smith
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