strange whining from my 4kq

[Aaron Sherrick]

My 4kq has been making some strange whining noises lately.  It happened
about a month ago, and then ceased.  It's back again, however.  It seems
like it might be related to the cold weather.  Anyway, the whining seems to
mostly happen in the 2000-3000rpm range, but it will still happen even if
the clutch is disengaged.  The loudness of the whine varies a lot.
Sometimes it will whine quite loudly, but if you speed up or slow down the
whining quiets or ceases.  It's really hard to tell where it's coming from,
but at one point I thought it was coming from behind me.  I really can't
tell.  What's the diagnosis, guys?  Thanks.

Aaron
'86 4kq