the thermostat is there to read the temperature of the coolant, besides reading the temperature it does another job. it opens up does anyone know why?

 

the thermostat in no way reads the tempature.

the reason it opens @ a certain temp is so that the water can flow past it while still being restrictive enough to hold the coolant in the radiator so it actually cools a bit intead of not being held up in any way. if it wasnt "blocked" by the thermo the coolant wouldnt get cooled enough by the radiator because it would flow way to fast.

it trys to maintain a steady temp (160,180, etc...) that is why they have diff temp ratings. for your desired temp.

 

so the coolant on the radiator side gets cooled, and when the coolant is cooled (while driving), the thermostat opens up? some people drive with no thermostat, what will happen?

 

the engine will become extremly hot due to the coolant not being "regulated" by the thermo.

 

the thermostat doesn't read the temperature, what does? the ect sensor? i see, know some cars that run without thermostat.