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. 18 Variable (135_)
2. 18 Break (135_)
3. 21 Saloon (L48_)
4. 21 (B48_)
5. 25 (B29_)
6. ESPACE II (J/S63_)
7. ESPACE Mk II (J/S63_)
8. TWINGO I (C06_)
9. 340-360 (343, 345)
10. 21 Estate (K48_)
11. 21 Savanna (K48_)
12. 340-360 Saloon (344)
13. 1300
14. DENEM
15. 1310 Saloon (U, X)
16. 12 Variable (117_)
17. VIRAGE Variable (117_)
18. 12 Break (117_)
19. 1300 Estate
20. 1310 Estate
21. See more in applications

The principle of the thermostat work

The classic MAGNETI MARELLI 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.