The coolant still seems to be getting too hot (240F+) even rolling at 20mph w the radiator fan on. After this last run today (#3), I could hear percolation in the engine after I shut it off in the garage. I'm not sure if that's bad, but it sure seems like it shouldn't be doing that. I previously tried to bleed it at the fill cap which the highest point in the system, but the system still seems like it might have air in it. I am a bit of a doofus on this stuff, so any recommendations are appreciated.