In article ,
Bob Engelhardt wrote:
Each of the heads had 1 cylinder badly "burned", as
shown. Anybody know what happened?


For comparison, here's a shot of a six cylinder Jaguar head
with similar damage:

http://haskey.com/johnh/19980626JAG/frame23.JPG

Presumably a valve stuck open, piston smacked it, bounced
it around for a while, piston shattered, more bouncing
around, engine stopped dead when piece of piston was wedged
between connecting rod and bottom skirt of cylinder. Fun
times!

---john.