Detonation 101

[JTesta1966 at aol.com]

Looks like a Honda 1.5 or 1.6 which had problems with head gaskets by their 
nature. I'd say more that something was bouncing around in the cyl. Maybe a 
electrode from detonation? Maybe during a tune up (theyre hemi heads) the 
tech didnt clean out the spark plug "tube" and debris got in? Maybe it was 
overheated REAL bad and dropped a valve seat, although I dont see any pieces. 
I have seen that before.
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