2004 Mercury Mountaineer Q&A
2004 Mercury Mountaineer Question: Where's the idle wheel located?
I think that you mean the fan belt Idler Pulley (wheel) and/or tensioner. These do wear out on Fords: here is a good source of repair information for your car http://bit.ly/mitchell_repair_manuals_online this should help you with the needed to replace those components. - dandd
I think the idle wheel is making a winding sound. If its bad how much to replace