This 4.7 has a high pitched whistle when running at idle. We pulled the drive belt and the noise is still there. Also checked for vacuum leaks because the noise is similar to a vacuum leak. We believe the noise is coming from under the timing belt cover. It is...

FIX posted 2/28/2013

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle