Hey Guys. I hate to introduce myself to the forum with a problem but you got to do what you got to do, right? I have an 05 3.9L Sport. The inlet tube in between the thermostat and the block split, causing a overheating issue. I replaced the tube along with the thermostat and the housing. The leak stopped, but being that the was pretty much straight water in the system, the coolant would boil when the car would come to a stop or be in stop and go traffic. Turning on the heater would return the temp back to normal. I drained the radiator and added coolant and bleed the system to fix the mix and remove any air in the system. The coolant doesn't boil but the car continues to creep in temp at a stop. Turning the heater on still returns the temp back to normal. When the car starts to overheat, the fan kicks in and you can hear it get faster, then the temp starts to creep. When the car is at speed, it shows no signs of overheating, only when is slows down or stops. There is no coolant leakage and all the coolant levels are consistent. One thing I noticed today is there is no flow into the degas bottle when the car is at temp. I am completely stumped at this point and have no idea what to look at next. Any help is greatly appreciated!!