Bigbirt

2013 F-150 FX4 - My friend of mine went "mudding" and ended up going through some really deep, like over the hood, wet mud. Truck made it through no problem, and made it home without issues. Afterwards he washed all the mud and crud out of the wheel wells, and under the hood, etc. All was fine until the cooling fans kicked on... only when the fans are on, there's a vibration that can be felt inside the cabin. He's going to take it in for the dealer to check out, but I was wondering if any of you have run into something similar.

Thanks.

tomb1269

Sounds like he has some mud or debry stuck to the fan blades or one or more blades was damaged by the mud. Possible fouled the fans alignment on the shaft or similar.

Bigbirt

You called it! He had sprayed everything down with a hose, but there was some crud stuck on there!! All better now. Amazing how that stuff sticks to everything and gets to areas you wouldn't think possible.