Since I have had the DeLorean I've experienced the common overheating woes. The car runs extremely cool most of the time, rarely going past the second temperature gauge mark. It usually will only begin to overheat after highway driving and I return to the regular streets. I've had "spectators" point out that I have antifreeze running or at times they say "pouring" out the back, and after driving the fluid is very low and the car is wet around the overflow hose. It seems that when driving I'm blowing a lot of coolant out the overflow before the engine begins to overheat. Loss of coolant seems to be the cause of my overheating instead of the by-product. I've checked the overflow cap and it vents at or slightly above 15lbs and will hold fine at pressures below that. I do have the plastic overflow tank and it appears to be in good shape. I've also installed the self-bleeding kit to the system. Also there are no leaks elsewhere in the system (via visual inspection). I have two suspicions and I'd like some advise: 1) Is it possible/probable that the plastic tank is deformed an not allowing the cap to seat properly? (Is there a pressure testor that doesn't use the overflow tank opening to attach?) 2) I have a head gasket leak allowing blow-by to enter the cooling system at the head. (This wouldn't necessarily show up in a cooling system pressure test as the cylinder pressure is much higher and the blow-by may only go one way) Any help or experience in this area would be appreciated, we all know how important/fun it is to have a reliable car to drive! Jeff #10544