my buddy has a small problem
 

I know that this for diesels, but I have a gas engine question.....
Does anybody know why a rocker would be so loose in a dodge 4.7L engine? He accidently let it overheat and the exhaust rocker fell out from under the cam. He got it home, and we started tinkering with it today. We are going to pull the heaqd tomorrow, but I was wondering if anybody might be able to offer up a suggestion as to why?:w2::c: