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. IS II (_E2_)
2. IS II Saloon (_E2_)
3. RX (_L1_)
4. CAMRY (_V2_)
5. CAMRY Saloon (_V2_)
6. CAMRY (_V1_)
7. CAMRY Saloon (_V1_)
8. SCEPTER (_V1_)
9. CAMRY Estate (_V2_)
10. CAMRY Estate (_V1_)
11. SCEPTER Estate (_V1_)
12. CELICA Coupe (_T16_)
13. MR2 II (SW2_)
14. CELICA Coupe (_T18_)
15. CELICA Convertible (_T18_)
16. LS (_F1_)
17. LS Saloon (_F1_)
18. CARINA E (_T19_)
19. CARINA E Liftback (_T19_)
20. ES (VCV10_, VZV21_)
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The principle of the thermostat work

The classic BorgWarner (Wahler) 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.