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. BRAVO II (198_)
2. RITMO III (198_)
3. MUSA (350_)
4. 33 (907A_)
5. S80 II (124)
6. S80 II Saloon (124)
7. XC90 I (275)
8. XC90 I SUV (275)
9. BRAVA (182_)
10. BRAVO I (182_)
11. PUNTO (188_)
12. Y (840_)
13. MAREA (185_)
14. MAREA Weekend (185_)
15. STILO (192_)
16. PALIO Weekend (178_, 173_, 373_, 374_)
17. WEEKEND Weekend (178_, 173_, 373_, 374_)
18. PALIO WEEKEND / WEEKEND Weekend (178_, 173_, 373_, 374_)
19. PALIO WEEKEND Weekend (178_, 173_, 373_, 374_)
20. YPSILON (843_)
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.