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. MX-6 (GE)
2. 626 IV Hatchback (GE)
3. CAPELLA IV Hatchback (GE)
4. 626 Mk IV Hatchback (GE)
5. TELSTAR IV Hatchback (GE)
6. XEDOS 6 (CA)
7. EUNOS 500 (CA)
8. XEDOS 9 (TA)
9. MILLENIA Saloon (TA)
10. MILLENIA (TA)
11. EUNOS 800 (TA)
12. 6 Hatchback (GH)
13. 6 Sport (GH)
14. ATENZA Hatchback (GH)
15. 6 Estate (GH)
16. 6 Sport Kombi (GH)
17. ATENZA Estate (GH)
18. 6 combi-coupe (GH)
19. MX-3 (EC)
20. EUNOS 30X (EC)
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.