The Z6 head is out of the car, just had it cleaned/decked and put new valve stem seals in it. When I bolt down the cam caps and the rocker assembly it is extremely hard to turn the cam by the gear, even wedging a screwdriver in a hole and prying it is so hard to turn. Should it really be this hard? I torqued all the caps to spec. I know I have to work against the valve springs to turn the cam, but I didn't think it would be this hard.