None of the pulleys should be wobbling at all. A quick test is to remove the belt and run the engine, but if you're sure that's not the source of the noise, it might be time to dig out a stethoscope. Use a pry bar by the right engine mount to move the engine sideways slightly in both directions. If the squeak stops, check the front engine mount brackets. The front part that's bolted to the body under the radiator has slotted mounting holes. If it is bolted off-center, the two metal brackets can rub against each other. Also check that the square metal tube in the center of the rubber isolator isn't cracked, and the rubber isn't torn allowing metal parts to rub.
Check that the engine is sitting level. If the driver's side is low, check for a torn rubber isolator in the left transmission mount. That one can be hard to see unless you remove the left wheel.
Do you only hear the noise when standing still or does the van have to be moving? If it only occurs when moving, there are a number of suspension-related things to look for, but if you hear it while standing still, the problem will have to be engine-related. Are there any other clues, such as it only occurs when the engine is warmed up, it goes away when there's pressure on the steering wheel, etc?
Friday, September 10th, 2010 AT 7:51 PM