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. 200 Hatchback (XW)
2. 400 (XW)
3. 400 Tourer (XW)
4. CIVIC VI Fastback (MA, MB)
5. JAZZ II (GD_, GE3, GE2)
6. FIT II MONOCAB (GD_, GE3, GE2)
7. FIT II (GD_, GE3, GE2)
8. FIT I (GD_, GE3, GE2)
9. CIVIC VIII Saloon (FD, FA)
10. BALLADE VIII Saloon (FD, FA)
11. CIVIC VIII Hatchback (FN, FK)
12. CITY Saloon (GD_)
13. FIT ARIA MK IV Saloon (GD_)
14. CITY MK IV Saloon (GD_)
15. FIT ARIA Saloon (GD_)
16. FR-V (BE)
17. EDIX (BE)
18. CIVIC VI Hatchback (EJ, EK)
19. JAZZ III (GE_, GG_, GP_, ZA_)
20. FIT III MONOCAB (GE_, GG_, GP_, ZA_)
21. See more in applications

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.