I adjusted the shims on my valves for in spec clearances. My intake Camshaft is complete but for some reason I cannot complete the exhaust. I will seat it down and put the cover on, which seems to be more difficult than it should be, and when I torque it down even far below the torque specs given in the service manual the exhaust camshaft has no play. The intake I can move a bit with my pinkie but the exhaust beats my fingered up just trying to move it at all. I have applied plenty of assembly lube and my clearances are in spec with the cover on. What am I doing wrong?