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. 12
2. VIRAGE Saloon
3. 21 Saloon (L48_)
4. 21 (B48_)
5. 21 Estate (K48_)
6. 21 Savanna (K48_)
7. RAPID Box Body/MPV (F40_, G40_)
8. EXPRESS Box Body/MPV (F40_, G40_)
9. EXTRA Van (F40_, G40_)
10. EXTRA Box Body/MPV (F40_, G40_)
11. ESPACE II (J/S63_)
12. ESPACE Mk II (J/S63_)
13. TWINGO I (C06_)
14. 340-360 (343, 345)
15. 66 (31, 36)
16. 66 Saloon (31, 36)
17. 340-360 Saloon (344)
18. 66 Estate (64)
19. 1300
20. DENEM
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The principle of the thermostat work

The classic BorgWarner (Wahler) 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.