All, I have been through this crazy experience myself this weekend. The car would over heat mostly in traffic or city driving. Then it went down hill from there. It got to the point where the radiator developed a serious leak on the drivers side. So replace the radiator (pretty easy), replaced the water pump (very easy). Test drove, still same problem. Next replaced thermostat (pretty difficult) and did a pressure test. Held 15 pounds for a good period of time, but the temp guage continued to fluctuate, but not as bad. I did have a difficult time bleeding the system though and getting good circulation. I had opened both the value on the thermostat housing and the one on the unit on top of the water pump. Finally replaced the radiator cap and drove about 50 miles, highway and city traffic. I still see some fluctuation and will replace the temp sensor next weekend. Since the pressure test showed steady for about 15 minutes, would that eliminate the head gasket issue? I have already had it replaced twice. Next time, it will be a do it myself project...
