the 4 valve cover bolts are removed on the drivers side and the cover is loose on the top side, wiggles up and down. It feels like it should come right off but I am unable to break the bottom part free. I've tried a little prying but don't want to crack the aluminum. Any ideas on what's holding it up? Wiring harness is out of the way too. Any suggestions would be appreciated as this is my first GN.