The sounds appear from about mid section of the motor. It
increases/decreases with revs.
Turned off A/C to test that possibility to no avail.
The car has 44k miles, so perhaps you may be right and the idler pulley is
going before it's time.
What's puzzling me though is why the sound disappears when the engine warms
a little, a few minutes run time and I never hear it again except when the
car has sat for a while.
Mid section huh... Well I don't see how that is near the belt, which is at
the extreme right side of the engine compartment (from the drivers vantage
point) But if you want to rule it out, wait until the engine is cold and
remove the serpentine belt. Start the engine without the belt and see if it
still makes the same noise. If not you've got it nailed (just have to
figure which of the pulleys is causing the noise). If it's still there then
that's not it. Don't run the engine more than a few minuites to test it
since you'll have neither an alternator for recharging the battery nor a
waterpump for cooling, but it will not harm anything to run that way for a
I've just checked the WIS, is the serpentine belt also what is known as the
drive belt for auxiliaries?
If so, I think it might be beyond my mechanical abilities, and its off to
the stealer for a fix.
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