Quote:
Originally Posted by mysticmissle
Porosity in the piston? Highly unlikely it's definately a forging. Does it line up with spark plug hole? Looks like effects of a piston stop from degreeing cam. Not sure why other side would have sanding marks. Is that what it is?
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My mistake, I think you're right about the cause of the marks, not sure why there are 4 of them though. Those are sanding marks. I would have expected this done on #1, not #2.