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. GALANT I (A12_)
2. GALANT I Saloon (A12_)
3. GALANT � (A12_)
4. COROLLA (KE_, TE_)
5. COROLLA Saloon (KE_, TE_)
6. COROLLA Hatchback (_E7_)
7. T-18 Hatchback (_E7_, T18)
8. COROLLA Liftback (_E7_)
9. COROLLA (_E7_)
10. COROLLA Saloon (_E7_)
11. COROLLA Estate (_E7_)
12. CRESSIDA Saloon (_X6_)
13. CRESSIDA Saloon (MX62, _X6_)
14. HIACE II Bus (_H11, _H2_, _H3_, _H4_)
15. LITEACE Van (_M2_)
16. SAMURAI Closed Off-Road Vehicle (SJ_)
17. SIERRA Closed Off-Road Vehicle (SJ_)
18. SAMURAI SUV (SJ_)
19. JIMNY Closed Off-Road Vehicle (SJ_)
20. X-90 (EL)
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.