Well I just finished installing the 180 F thermostat. What a pain in the butt. Thanks to Koozy for a lot of pointers that made it easier for me, though it was definitely still a learning process. Initially I tried to remove the serpentine belt from the top on the tensioner, but it can only be done from the bottom. To access it from the bottom you have to remove the passenger front wheel and then a little splash guard which is held on by two screws. It was very simple, I don't know why I was so reluctant LOL. Everything was pretty straightforward and I also was reluctant to remove the headlight But ultimately it had to be done. That too is a very simple procedure. All in all I had to remove the front wheel, the headlight, the alternator, and the AC compressor. I did not fully remove the AC compressor, I simply unbolted its mounts and let it hang a little bit to give me access to the lower bolts on the thermostat housing. I also did not remove the small bypass hose on the housing. That spring clamp is just about impossible to get to and I did not feel like pulling off the oil filter to give me a little bit better access. The bypass hose is long and flexible enough that I still had plenty of room to work with on the housing with the hose attached. I think it was about 1.5 hours start to finish.
Another tip: when reinstalling the serpentine belt, route the belt around all the pulleys except the water pump. Once you leverage the tensioner out of the way, you can easily slip the belt onto the smooth pulley. The alternator and AC compressor are grooved and very difficult to access from the bottom where you have to be to access the tensioner.
Edit: Come to think of it, you shouldn't even need to take the wheel off. The splash panel is attached from under the car. I removed the wheel because I thought the panel attached from inside the wheel well.
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