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. RAV 4 III (_A3_)
2. RAV 4 / VANGUARD III (_A3_)
3. ALPHARD / VELLFIRE (_H2_)
4. COROLLA Saloon (_E15_)
5. COROLLA Saloon (_E15_, _E14_)
6. ALTIS Saloon (_E15_)
7. COROLLA ALTIS Saloon (_E14_, _E15_)
8. COROLLA Saloon (_E14_, _E15_)
9. COROLLA ALTIS Saloon (_E14_, _E15_)
10. COROLLA / COROLLA QUEST Saloon (_E15_)
11. COROLLA Estate (_E14_)
12. FIELDER Estate (_E14_)
13. COROLLA RUMION (_E15_)
14. RUKUS (_E15_)
15. WISH MPV (_E2_)
16. NOAH/VOXY (_R7_)
17. NAV1 (_R7_)
18. MARK X ZIO (_A1_)
19. HARRIER (_U3_)
20. CAMRY Saloon (_V4_)
21. See more in applications

The principle of the thermostat work

The classic BLUE PRINT 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.