It sounds like the belt is making the noise. A really easy to check it is to:
start the van
open the hood
with the engine running and tweeting, pour a small amount of water on the belts. Be prepared because it will splash water toward you.
If the sound stops, the belts are dry or the automatic tensionier is weak. Keep in mind that the sound will come back when the water dries.
Monday, October 6th, 2008 AT 3:29 PM