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. 323 III Station Wagon (BW)
2. 323 III Break (BW)
3. 323 Mk III Station Wagon (BW)
4. FAMILIA III Station Wagon (BW)
5. 929 II (HB)
6. 929 II Saloon (HB)
7. 929 Mk II (HB)
8. 929 III (HC)
9. 929 III Saloon (HC)
10. LUCE III (HC)
11. 929 Mk III (HC)
12. 323 S IV (BG)
13. 323 IV Saloon (BG)
14. PROTEGE Mk VI (BG)
15. 323 S Mk IV (BG)
16. FAMILIA IV (BG)
17. 323 IV (BG)
18. 323 C IV (BG)
19. 323 C Mk IV (BG)
20. ETUDE IV (BG)
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The principle of the thermostat work

The classic BLUE PRINT 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.