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HyvaGroup's avatar
HyvaGroup
Explorer
Jun 03, 2019

Trying to diagnose a loud rattle coming from the floorboard

I am trying to find where a loud rattle noise is coming from on my 2005 Winnebego Itasca 31` E-450 with only 22k miles. The noise starts after about 30 minutes of driving on the highway mainly when a...
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pnichols's avatar
pnichols
Explorer II
Oct 19, 2021
I wonder it it's the infamous E350/E450 serpentine belt "rattle"?

This has been discussed a lot in the Ford owners forums. I believe the solution has something to do with an additional, or different, idler pulley between installed at a certain place in the belt's path so as to better support the belt at certain engine speeds.

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