My 83 300D acted up a bit when I first got it, temp running high (around the 100 mark), twitchy indicator etc. I couldn't drive it last winter because the axle shafts broke. I fixed them in the spring and have been driving the car on and off all summer. The temp stayed right where I like it, about a half inch off the 80 degree mark. Until This morning. It was cool this morning, 46 degrees or so when I left for work, the temp went right to 100 and stayed there or a little under all the way into work.
Why does the car indicate it's running hotter on a cooler day? Could this be a function of the thermo fan? Seems that as long as the outside temp is high, the car's engine will run cooler. Sort of odd, no?