Hey, I read on a post you replied on a year ago. That you replaced a piston on a 4.0 from the bottom without removing the head. Is it possible? The reason I ask my wife has a 2001 grand cherokee 6cy and we live in an apartment. We have a garage but not much room and Management can be a**holes about working on vehicles. I just want to be sure before I try, and break a ring or something? Thank you for your time!