Ok so I’m in the process of removing the head on a 2008 d22 yd25, and I’ve removed everything around the head. I’m trying to rotate the crank clockwise to line up timing marks but it will only go about 90 degrees before locking up. It’s in neutral , I’ve removed all belts. The timing was right when it was running. I’m lost as to why I can’t rotate the crank anymore . It feels like a valve is meeting a piston. I don’t have the injectors out yet could they be causing the compression to be too high to rotate the engine?.