so i went wheeling the other day and absolutely could not keep the temperature of the engine more than a mm above the 100* mark, so i figure bad thermostat. i replace the thermostat and the engine warms right up. i think great... look down at my thermostat again and the temp has shot up above the 210* mark, so i turn on the heater and it is barely able to keep it averaging just a tick above the 210* mark (which means it fluctuates between 210* and maybe 1/2 way to the next tick mark up). so i figure maybe i missed something and put it in backwards. pull it out, and sure enough the spring side of the tstat is facing the engine, so i put it back in, hoping this was just a freak incident. drive to school again today and it does better - doesn't really need the heater's help to keep the temp at 210* except for about 3 or 4 cumulative minutes of assistance from the heater. do they just need a bit of time to set, or is this a bad tstat? i'm getting really sick of buying bad parts these days... probably over $100 spent in bad parts this last month. anyone have any thoughts?