Yep it wasn't a very good day. I bought a 2002 Grand Cherokee with a 4.0 that needed the head replaced. Got it all back together and it wouldn't start, didn't have any spark. Doing all the research it seemed to logical to replace the crank sensor. I was able to get the bolt out. Spent a lot of time prying in different ways trying to be gentle. Then it broke off in the block. Any suggestions on a good way to access it to get it out?? Thanks in advance.