Sounds to me like you just popped the plug out of the cylinder. The dealer is probably just assuming the piston hit the spark plug, causing it to pop out. I dont think the piston hit the spark plug. Good luck with everything!
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98 T-Red SE Sport ATX
ST200s
Slightly Lowered
Catless Y-Pipe
Resonator Removed
Clear Front Lenses
Side Markers
SVT Seats