hey all,i flushed my engine coolant and changed the thermostat sunday afternoon. before, my truck would take ~3 miles or so before the gauge read above 140. once warm, my needle would stay above 140 but NEVER cross 190. since the flush i can reach 190, often before i'm out of my neighborhood. while driving, the needle bounces either side of 190. i have also noticed that the overflow resiovor has more fluid than when i finished the flush(i keep expecting to put more in). the thermostat was one from the local oreillys(murry brand, i believe). is these normal, or do i still have air in the system? it is a little unsettling to see something different from on a cluster you've been staring at for 3 years.