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. ASTRA J Sports Tourer (P10)
3. CORSA D Hatchback Van (S07)
4. AVEO Hatchback (T300)
5. SONIC Hatchback (T300)
6. AVEO Saloon (T300)
7. SONIC Saloon (T300)
8. ASTRA J GTC
9. ASTRA J Coupe
10. OCTAVIA I Combi (1U5)
11. 407 SW (6E_)
12. MERIVA A MPV (X03)
13. 207 (WA_, WC_)
14. 207/207+ (WA_, WC_)
15. VIDA Hatchback (SF4_, SA4_)
16. LANCER VIII (CY_A, CZ_A)
17. LANCER VIII (CY_A, CZ_A, CJ)
18. GALANT FORTIS VIII (CY_A, CZ_A)
19. LANCER FORTIS VIII (CY_A, CZ_A)
20. LANCER SERIE R VIII (CY_A, CZ_A)
21. See more in applications

The principle of the thermostat work

The classic DOLZ 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.