I cant seem to get the valve body off. I printed off the sheets on how to do the removal, but the thing wont budge. I left in the 5 bolts that the photo showed to leave installed. I even tried to back out just a little on those bolts 1 at a time to see if it would move some. I do have 1 extra bolt on the bottom right of the valve body, its short so I put it back in. it s not holding it from moving. any suggestions?