I stopped my engine rebuild because I'm stumped. I reassembled the crank halves by the book. Let it cool, placed seal,etc. And it states to turning the crankshaft for tight spots. It turns, no grinding or hitting, but I got it in pieces and I have no reference as to how freely it should move. Should it spin like a top? Or stop in place when I twist ? It feels stiff to me. I'm not going any further so I don't do damage , and hear from the pros.