Re: 4.7 valve timing and damage assesment
I don' t think that using the startermotor did anything, most probably damage already occured when the chain got of of the cam sprocket and the engine spooled down completely. If it was only at idle for example, then it was still making 650 rpm, and after loosing the cam drive, the cam most probably stopped quite abrupt, but the crankshaft, with its bigger mass, for sure continued several revolutions still, bending the valve(s) which where full open. With luck its maybe only one valve.
The valve cover is of i believe you said, so you can now see which valves are open by looking at the cams. The ones completely open now have a good change to be bend.