so im trying to remove the cylinder head but theres is 10 8m hex allen bolts and i cant loose them up and everytime i try to remove it. it feel like the wrench is about to snaping..so im wondering how do u remove them and another thing do i need to remove the spark plugs to remove the head??

 

You don't need to remove the spark plugs to get the head off. If the motor still in the frame or on a bench? When I was taking mine apart it was still in the frame. Make sure the allen is all the way in the bolt head. Otherwise you will strip the head. I used a 1/2 drive breaker bar to loosen them up. It take some force to get them to break free. I would say go slow to break them free.