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Showing results for tags 'idler pulley missing'.
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I have a 2016 Jayco Class-C motorhome built on the E450 cutaway chassis with the V10 motor. I've been chasing a noise for a long time, as have been many other 2011-2019 E450 (cutaway) motorhome owners with the V10 motor. It sounds like spark knock, but better fuel does not help at all. There is a history of owners taking their vehicles into the dealer for a diagnosis, but the problem remains unresolved even after belt/pulley/tensioner replacement. One of the owners on the Jayco website found the issue. VIDEO: https://youtu.be/Oa6cr2dFkPE --> As it turns out, there is serpentine belt instability on these motors. <-- Further, it was discovered that prior to 1999 there used to be an additional idler pulley mounted between the PS pump and alternator, the area where the belt is fluttering. The threaded mounting boss still exists. Why was this pulley deleted??? Can I safely put one back on???