[fackbell]

I’m in the process of replacing the cylinder head on my 2001 Olds 2.4L. When reassembling the timing chain, I found that I can no longer make a full rotation on the crankshaft. Something is stopping the crankshaft from completing the rotation a few degrees from TDC when I rotate the crankshaft in either direction. However, the crankshaft rotated without a problem before I pulled the head off. I have since removed the camshafts again so the valves are completely released. I’m trying to avoid removing the new head as it is a big hassle to disassemble the timing chain housing and I’d have to get a new head gasket, but I may have to for lack of any other ideas. It doesn’t seem like it is valve to piston interference though… Could it possibly be some binding with the balance shaft assembly? I'm at a loss here...