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. NP300 NAVARA (D40)
2. NAVARA Pickup (D40)
3. FRONTIER (D40)
4. CAMIONES / FRONTIER (D40)
5. FRONTIER / NP300 (D40)
6. NAVARA (D40)
7. SANTA FE I (SM)
8. CELICA Coupe (_T20_)
9. CARINA E Saloon (_T19_)
10. CARINA E (_T19_)
11. CARINA E Liftback (_T19_)
12. NP300 NAVARA Platform/Chassis (D40)
13. NAVARA Platform/Chassis (D40)
14. NP300 Platform/Chassis (D40)
15. CARNIVAL / GRAND CARNIVAL III (VQ)
16. SEDONA III (VQ)
17. GRAND SEDONA III (VQ)
18. SEDONA Mk II (VQ)
19. CARNIVAL / GRAND CARNIVAL II (VQ)
20. VQ III (VQ)
21. See more in applications

The principle of the thermostat work

The classic BGA 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.