"I think he screwed up the crosshatch on the cylinders causing them to glaze and therefore cause smoking and carbon buildup on the cylinder walls. "
screwing up the cross hatch is kinda damn near impossible to do.Glazed surfaces are smooth.Carbon doesn't stick to a smooth surface,which is why you polish EXHAUST ports and not INTAKE ports.
And like Mike said:If your wrench told you this,run away from him and run fast.Screaming is optional.