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 (KP6_)
2. STARLET Estate (KP6_)
3. COROLLA Hatchback (_E7_)
4. T-18 Hatchback (_E7_, T18)
5. COROLLA Liftback (_E7_)
6. COROLLA (_E7_)
7. COROLLA Saloon (_E7_)
8. COROLLA Estate (_E7_)
9. COROLLA (_E8_)
10. COROLLA Saloon (_E8_)
11. CORONA Hatchback (_T13_)
12. CRESSIDA Saloon (_X3_)
13. CRESSIDA Saloon (_X6_)
14. CRESSIDA Saloon (MX62, _X6_)
15. CARINA (TA4_, TA6_)
16. CARINA Saloon (TA4_, TA6_)
17. CARINA Estate (_A6_)
18. CARINA II Saloon (_T15_)
19. CARINA Mk II Saloon (_T15_)
20. CARINA II (_T15_)
21. See more in applications

The principle of the thermostat work

The classic VALEO 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.