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. CORSA D (S07)
2. MERIVA A MPV (X03)
3. ASTRA H Estate (A04)
4. CORSA Mk II (C) (X01)
5. CORSA B (S93)
6. VITA B (S93)
7. CORSA Mk I (B) (S93)
8. ASTRA G Hatchback (T98)
9. ASTRA G Estate (T98)
10. CORSA D Hatchback Van (S07)
11. ASTRA H GTC (A04)
12. ASTRA H (A04)
13. ASTRA G Saloon (T98)
14. CORSAVAN Mk III (D) Hatchback Van (S07)
15. CORSA C (X01)
16. VITA C (X01)
17. COMBO Tour
18. COMBO Mk II (C) Box Body/MPV (F25)
19. ASTRA Mk V (H) Estate (A04)
20. COMBO Box Body/MPV
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.