Could be the alternator bearing, or the belt not being tight enough.
You could remove the belt for a test drive and see, could also be
water pump bearing.... Just a thought...wayne
At 08:56 PM 3/19/99 -0800, you wrote:
>My recently rebuilt 235 is running great, but I have a funny high pitched
>noise at 40-50 mph. The faster I go the louder it gets, and when I let off
>the gas it stops. If I slow down to 35 or so it stops. It' a fast,
>pulsating (not constant) sound, and I don't think it's the fan belt. Oil
>pressure is high, and nothing happens with the power or anything, just this
>irritating high pitched noise. Sounds like a bunch of birds chipring. Any
>thoughts?
>
>Thanks!
>
>Smokey
>'50 3600 5-window
>
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
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