24. Doesn't seem to be overfilled. Loose fan belt might be the cause, but I don't know how to tension it further. The fan I have sucks in air, and doesn't blow it out from the engine side. Should I get a different fan? I don't see any way to install the one I have such that it would reverse air flow.
25. Thermostat seems to be installed correctly to my knowledge. Pointy side toward the radiator. I tested it on the stove before I installed it. It opened between 180 and 190.
35. It is there.