Re the cooling fuss, that was when I disputed the strange idea, widely-spread by car hobbyists, that adding a restrictor plate in the coolant flow can keep an engine from overheating. Strangely, the thermostat works the other way (opens more to increase cooling). Their figuring is "coolant flows thru the radiator too fast to cool down, so have to slow the flowrate". You can find a blog by a Robertshaw engineer (makes T-stats) who was amazed when he saw this idea, and tracked it down to a 1920's car where excessive water pump pressure pushed open the radiator spring cap to lose coolant, thus the fix. Also, many strange ideas of how a T-stat works. Many think it continually opens and closes while driving. Also few understand "proportional control droop" which makes your coolant run slightly warmer under high load (T-stat requires slightly higher temp to open more).