Air not water

[BLAIR]

So how do you know the motor is done? Have you tried to pull the plugs out or did you put a large hole somewhere in the block?

I let it sit for a few mins.. pulled out the airbox and soaked filter and attempted to start it. It cranked then started then made lots of loud noises and shot pieces of block into the sand.

Obviously i should have pulled the plugs and cranked it to get the water out, but i didnt have tools and in past experiences we would just restart it and everything would be fine.. but not this time