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 A TR (S83)
2. CORSA A Hatchback (S83)
3. KADETT D (31_-34_, 41_-44_)
4. KADETT E Hatchback (T85)
5. KADETT E (T85)
6. MONZA E (T85)
7. KADETT E Estate (T85)
8. KADETT E Convertible (T85)
9. VECTRA A Hatchback (J89)
10. ASCONA C Hatchback (J82)
11. ASCONA C (J82)
12. VECTRA A (J89)
13. ASTRA F Hatchback (T92)
14. ASTRA F (T92)
15. OPTIMA F (T92)
16. ASTRA F Convertible (T92)
17. ASTRA F Estate (T92)
18. CORSA B (S93)
19. VITA B (S93)
20. COMBO Box Body/MPV (71_)
21. See more in applications

The principle of the thermostat work

The classic AUTOMEGA 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.