Thermostat temps

[CSchmidt]

Yeah i only changed the thermostat. I went from a 160 to a 180 thermostat. Thinking I had a 180 all along I might go back to 160. I thought my thermostat was sticking open or closed cause it got to temp kinda quick thats why i switchedit out. I tried purging the system a couple of times without success but I don't have the right funnel. I drove the truck without a thermostat last week and it didn't overheat stayed between 170 and 180. It just started overheating with the higher 180 thermostat. Didn't have any issues with the 160 in the summer time. Will get hot at a traffic light but goes down when I drive again. Water pump is fairly new. Thanks.