617 cracked crankshaft

[jobah]

My father in law had some car trouble......

It appears that his chain broke and the result was that the as the pistons slammed into the valves, the valves were pushed into the rockers and eventually the rockers were slammed into the camshaft snapping the camshaft at two places (piece 1: cylinder and 2; piece 2: cylinders 3 and 4; piece 3: cylinder 5). Also, the middle bearing support (i believe between cylinders 2 and 3 is cracked.

My question is, what is the chance that there is no valve damage and no piston/crank/rod damage.

I have had the head off on my 601 a couple of times, along with the front cover, etc. , and I have no problem taking on a 61x engine.

However, before I dig in, I would like to know if the answer may be as simple as a new camshaft, new camshaft bearing supports and a new chain?????

Also, is it possible that the valves were out of adjustment that the valves did not properly close which led to the eventual destruction???? The car had some out of the blue starting problems two weeks ago, but these were cured with new glow plugs (i think the problem is unrelated, but I'm not sure).

Thank you