Car is running hot and i don't know why.

[LaunchHard]

I know this is an old thread, but i figured i'd post on it rather than making a new thread. I'm still having cooling problems.
I bought a 180 degree thermostat, a high pressure radiator cap, and an Koyo radiator. When i replaced the thermostat i went to burp it and the the temperature on the gauge rose slowly and got to the center, then it kept going and the fluid level never dropped on the top of the thermostat. This is the third thermostat i've insalled and it seems as though none of them are oppening. This one is even a fail safe, could it be possible that they aren't opening. Mybe i'm installing them wrong, are you supposed to have the spring up or done, i have it down. Please Help!!!