Hi Joe--
I did as you suggested, and only number two was frozen. A few quick taps and another penetrant bath released it.
A little trick I used was to place a golf tee into each valve. As I rotated the engine, the tees moved up and down like an old calliope, and it was very easy to see which pistons were free and which were not. It was also easy to see when the piston was at the top and at the bottom of it's travel.
Thanks, Joe, for your usual great advice.
Joe
