Long time no see, so hello to any of you who remember me. 1 1/2? years ago, by engine started overheating bad, on almost any hill, even short ones. I figured it was the head gasket/warped head since it REALLY overheated 2 years ago in Moab when I somehow lost my harmonic balancer while in the highway. It was fine for a few months after I got the water pump turning again, but then suddenly started heating up. Well, I finally got around to pulling the head, and I don't see any obvious signs of gasses getting past the head gasket. Shouldn't the metal at least be discolored if that was the case? Or maybe the problem was the crappy plastic WP impeller slipping on the shaft? I haven't looked at it yet. I do have an all metal one ready though. Also, I was getting a lot of blowby on a fairly new rebuild. I no longer have a manual as i was using the GF's and she is gone.How much piston play can an AHU have? It seems like I can wiggle my pistons an awful lot in the bores, in any direction at that. Maybe that's my blowby problem. Not much of a ridge at all though, which seems strange for so much apparent movement.