when the cooling fan kicks on and the engine is off a strange noise comes from the fan.

 

Check for mud in the fan.

 

Check your fan mounting parts for broken welds. Some guys have been having problems with one of the fan mount tack welds breaking.

 

A small stick made mine make funny sounds.

The spot weld being loose on mine made a little vibration too, not bad.

Another guy lost a fan blade from a stick, he had to get the hole fan assembly, for $270 or so. It was a lot of mula.

Get on your knees and pray, sit and chant with your legs in a pretzel, recite prayers while bobbing your head, ingest large quantities or fermented liquid barley product, make an animal sacrifice or do whatever you can do to pray your radiator fan is ok and only has a small stick touching it. It is awful expensive to replace.

If mine were bad, I would try to get the smallest one from permacool and see if it would fit since they are only $60 to $80.