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. X5 (E70)
2. X5 SAV (E70)
3. X6 (E71, E72)
4. X6 SAC (E71, E72)
5. 3 Touring (E91)
6. 3 (E90)
7. 3 Saloon (E90)
8. MINI COUNTRYMAN (R60)
9. MINI COUNTRYMAN / COOPER COUNTRYMAN (R60)
10. CROSSOVER (R60)
11. COUNTRYMAN (R60)
12. X3 (E83)
13. X3 SAV (E83)
14. 5 Gran Turismo (F07)
15. MINI Coupe (R58)
16. 5 (F10)
17. 5 Touring (F11)
18. 1 Coupe (E82)
19. 3 Convertible (E93)
20. MINI Roadster (R59)
21. See more in applications

The principle of the thermostat work

The classic SASIC 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.