I have replaced any and everything to solve this problem. My car gets hot and quick. No need to say water pump, new rad, check timing....etc. I've replaced it all. Once it gets hot and I shut it off and go to crank it again, It's as if the the motor is having a hard timing turning over. Like its jammed up or something. When it cools for a few hours, BAM! starts right back up again. I've heard this and that on my car, right now Im close to pushing it in the river (or buying a 347 from CHP..shhhh dont tell the wife) Anyhow, I had a guy that builds drag cars say possibly a warped head and that was thru another friend. Could someone tell me some symptoms of a warped head? Possibly something else majorly mechanical that could cause this. Thanks!