I believe what he's concerned with is this...
View attachment 1716094860
It is damn close but doesn't look like it hurt anything.... Probably due to piston rock on cold start up.... Back in the early 90's Ford had an issue with the Probe, they were rattling on cold start, I tore a few down, you could see the piston part number stamped into the top of the piston transferred to the aluminum cylinder head... Didn't hurt a thing, we would put it back together with a .010 thicker head gasket...
