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. LAND CRUISER PRADO (_J15_)
2. YARIS VERSO (_P2_)
3. YARIS VERSO / FUN CARGO (_P2_)
4. FUN CARGO (_P2_)
5. ECHO VERSO (_P2_)
6. COROLLA Compact (_E11_)
7. COROLLA Liftback (_E11_)
8. COROLLA Estate (_E11_)
9. YARIS (_P1_)
10. ECHO (_P1_)
11. YARIS/VITZ (_P1_)
12. VITZ/ECHO (_P1_)
13. COROLLA (_E11_)
14. COROLLA Saloon (_E11_)
15. RAV 4 II (_A2_)
16. RAV 4 Mk II (_A2_)
17. RAV 4 II SUV (_A2_)
18. COROLLA (_E12_)
19. COROLLA / ALLEX (_E12_)
20. RUNX (_E12_)
21. See more in applications

The principle of the thermostat work

The classic TOPRAN 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.