[777stickman]

Originally Posted by spunger

I filled the system back up, put the cap back on, and no pressure in the upper hose. The hose gets hot but never gets hard like it's full of fluid.

This is the phrase from your 1st post that leads me to believe there is air in the system. As to if the correct sensor was replaced?? If there is air around the sensor, and not coolant, it's going to read a higher temp.

One other thing is the "goop" you put on the sensor threads. Sometimes this will not allow the sensor to see a good ground at the engine for a good reading to the guage.