I have one of the first 95 SE 5-spds, since new May 94. I forget if
115-120k miles.

It recently started making the characteristic sound of a water pump
bearing failing, but there is no leakage. Last time I asked the dealer to
replace the coolant (some time ago) they tested it and said it didn't need
it because it was still good. Now it just makes a chirping sound kind of
like a cricket (varies somewhat with engine speed, sometimes quiet).

With everything driven by the same belt I cannot tell where the sound is
coming from. Coolant and power steering fluid levels are fine. So I was
wondering if anyone has ever had trouble with the idler pulley bearing or
the spring mechanism getting stuck and no longer providing enough belt
tension?

It has tested its rev limiter in autocross and I live in Illinois where
road salt can take its toll on things, but do not drive it much in winter
(Pathfinder for that).