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. SIGNUM Hatchback (Z03)
2. VECTRA C Estate (Z02)
3. VECTRA C (Z02)
4. VECTRA C GTS (Z02)
5. ASTRA H (A04)
6. ASTRA H Estate (A04)
7. VECTRA Mk II (C) GTS (Z02)
8. VECTRA Mk II (C) (Z02)
9. SIGNUM (Z03)
10. VECTRA Mk II (C) Estate (Z02)
11. 9-3 (YS3F, E79, D79, D75)
12. 9-3 Saloon (YS3F, E79, D79, D75)
13. ASTRA H GTC (A04)
14. 9-3 Estate (E50)
15. ZAFIRA / ZAFIRA FAMILY B (A05)
16. GRANDE PUNTO (199_)
17. PUNTO (199_)
18. CROMA (194_)
19. 159 (939_)
20. 159 Saloon (939_)
21. See more in applications

The principle of the thermostat work

The classic FAE 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.