I really don't know, I have not looked. The noise was so loud news helicopters came to see what was happening, the engine got hot and there was clouds of oily smoke. Before that the 30% less then normal power dropped to 80% less then normal. I doubt there is a hole in the block, but a cylinder or two or an entire head or something came completely apart. I suppose its possible since a 5 year old was working on the heads they messed something else up, but it really sounds like bottom end. I need to do a better visual inspection, but I don't think we would know anything with out tearing it down. Coolant looks full, no oil contamination. Oil is normal level, but I think I see very small metallic material.