Hi there All

I have been to work today and took my engine back plate off and had a look and this is what I found.

I have tryed moving the Piston and it is free and moves ok, So all I can think of is that there was a fualt in the crank. Which cursed it to fail ? If anyone out there has a better idear on what could have happened? Plz can you put a post here as I am taking the engine into my LHS tommorow to see what they say.