Hey all, I'm doing my head gaskets, due to white smoke and bubbling coolant a few weeks ago. When I got the heads off, I noticed that all four holes for the alignment pins (two holes, on each head) were out-of-round, looking like they got pulled outward. It's only a millimeter or two, but it's enough to cause a bulge of material in the head surface of about 2 thousandths of an inch, possibly enough to be the cause of my gasket failure. Anyone know what would cause this?