Thermostat is a device for maintaining a static (constant) temperature, as its name implies. There are thermostats of different designs in many devices and mechanisms, from water heaters to refrigerators. There is also a thermostat in a car's internal combustion engine (liquid-cooled, of course). In a car, the thermostat regulates the temperature of the coolant (antifreeze): it accelerates the warm-up of a cold engine and provides heat removal from the hot one. Therefore, the engine works more efficiently and more comfortably for the driver, especially in winter - without a thermostat, the stove would usually blew cold air.

1. STARLET (_P7_)
2. STARLET (_P8_)
3. COROLLA Liftback (_E8_)
4. COROLLA (_E8_)
5. COROLLA Saloon (_E8_)
6. COROLLA Coupe (AE86)
7. COROLLA SPRINTER Coupe (AE86)
8. COROLLA Liftback (_E9_)
9. COROLLA (_E9_)
10. COROLLA Saloon (_E9_)
11. COROLLA Compact (_E9_)
12. COROLLA Station Wagon (_E9_)
13. CARINA II Saloon (_T15_)
14. CARINA Mk II Saloon (_T15_)
15. CARINA II (_T15_)
16. CARINA II Liftback (_T15_)
17. CARINA Mk II (_T15_)
18. CARINA II Saloon (_T17_)
19. CARINA Mk II Saloon (_T17_)
20. CARINA II (_T17_)
21. See more in applications

The principle of the thermostat work

The classic BGA brand Thermostat, coolant is a movable valve that moves due to a change in the external environment - heating or cooling of antifreeze. The thermostat is made of a thermoelement filled with a substance resembling wax in structure - ceresin, with the addition of copper powder, graphite or aluminum for better thermal conductivity. At a certain temperature of the antifreeze, ceresin expands, opening the thermostat valve. When the motor cools down, ceresin contracts and the thermostat closes again.