Recently, my engine has been running a little warmer than usual. Still staying outside the red area, but it bounces between mid-point on the radiator fluid temp gauge and just below the red area. I'm thinking about draining the radiator and replacing the fluid cause I just recently had work done on it but I'm not sure if they used Dex-Cool or not, i still have to ask them. How do you bleed out all the fluid from the radiator though? I know where the reserve tank and pressure caps are, but since those are the high points of the radiator setup, is there a plug/cap on the bottom of the radiator to drain it?

Also, I was thinking of maybe replacing the Thermostat since it seems to be a pretty simple thing to replace. What temp Thermostat should I get for my engine though? I have the supercharged 3.8L (hence being in this thread), only modifications to the engine so far have been K&N Air Intake, MSD Spark Plug Wires & Pulstar Iridium Pulse Plugs. All in all I'm probably not going to do very much, if any more work into the engine so it's probably gonna stay with this setup for a long time.

Any help would be appreciated, thanks!!