You pretty much hit the nail on the head.

It doesn't look near as bad as the other side. I still don't know what happened. I want to pull the timing cover off and check the cam timing though.

I turned the crank over some and no noises like I was hearing. I can't find where the pieces of metal cam from, and I can't see any obvious evidence where the valves may have tagged pistons.

 

Something from the intake track?

 

Could it have possibly been severe detonation in those two cylinders?

Jim

 

There hadn't been any KR. I don't konw what would have made it just appear from no where.

Non eof this still explains the 'dropping a cylinder' I felt.

 

I had no KR at all either when #1,5 & 7 upper ring lands went on mine. I had my eye on my scanguage. I had a sudden nose dive an could hear the severe detonation though

 

Maybe that wasn't caused by knock either???? I dunno. I know mine wasn't knocking though, or hasn't anytime I put a scanner on it.