Hello, So we have a timing chain guide or tensioner malfunction so it jumped and bent valves. We replaced all the sprockets, chains, guides, tensioners, and valves on the one head, everything lines up as far as the marks on the idler,crank, and cam sprockets. I rotated the crank by hand with no spark plugs 2 rotations, marks are right where they should be. I then decided to crank it more and another revolution and a half I met resistance, not sure what direction to go from here any suggestions would be great.