whistle/whine coming from an engine
it could be a common problem from the v6 i had years ago, i don't remember. i just remember some car i owned had this problem in many of the cars that were manufactured. thanks.
If the noise stops immediately with your belts, its probably a pulley, or worse a crank bearing... ouch! I also just replaced my alternator because one of my pulley's was off my just a couple mm, pulling the alt. pulley inwards, causing the heat fans on the back to rub on the rear wall.
Hope that helps.
John


