Originally Posted by CJ_1080
Never thought of that, that's a good one! I've had a few heads be complete boogers. Usually because the tractor or motor I'm working on hasn't moved in 40 + years.
If you do that make sure you do as somebody else mentioned and loosely screw in a couple head bolts. You don't want the head popping free in an uncontrolled fashion. It would probably also be best to make sure the cylinder you pressurize is at BDC.