A while ago when I changed my belts, I found it really hard to turn the engine over by hand, I'd get to about TDC and it'd get really hard, then it would sorta spring through the hard bit and get easy again. With the belts off, I still couldn't rotate the cam pulleys all the way around by hand (felt the same). Whats the go with that? Is it normal?? I'm about to do my valves and I don't know how I can check for binding if it's like this!