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. 206+ (2L_, 2M_)
2. C3 II (SC_)
3. 207 (WA_, WC_)
4. 207/207+ (WA_, WC_)
5. C3 I (FC_, FN_)
6. C2 (JM_)
7. 207 SW (WK_)
8. 207 SW Estate (WK_)
9. NEMO Van (AA_)
10. NEMO Estate
11. BIPPER TEPEE
12. 207 Hatchback Van (WA_, WC_)
13. C3 Pluriel (HB_)
14. C2 ENTERPRISE (JG_)
15. See more in applications

The principle of the thermostat work

The classic FEBI BILSTEIN 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.