Just found this
http://www.dailymotion.com/video/xrwcj_moteur-renault-diesel
Very nice video
Look at the shape of the pistons
Yeah, what's up with the pistons?
Skip
Dished. Supposed to contain the combustion force to the top of the piston instead of dispersing all around the head and cylinder.
Dished , but also a cone shaped point ... Amazing ...
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