On my way to NY from FL at about 80mph as I hit the gas to accelerate I heard something really REALLY loud and ran something over & soon after my car felt funny so I pull over to check it out.
The belt was still turning and everything looked just fine sept for the fan blade missing some blades so I thought a rock hit the fan or something
but what i missed was the outer ring from the the crank pulley (the lines you see where the belt rides) just came off some how leaving the crank pulley looking smooth more like a tensioner pulley and broke my fan blade apart when it came off.
As I was told this is a command problem for our cars theres rubber holding the two parts of the crank pulley together this rubber gets weak after all the years of being beaten by hot and cold weather i guess.
Now im looking to replace it with a solid under drive racing pulley so it wont happen again
but yea if you didnt know this by now now you do and i suggest that you replace this damn pulley ASAP its not safe!!!!!!!
I was lucky that it didn't cause more damage and was able to drive back to where I started you might not be as lucky!
another story about the pully on LOC...
http://www.lexusownersclub.co.uk/for...hp/t32237.html
I made this for better easy understanding...

(The outer-ring is the one that comes off)