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. C25 Bus (280_, 290_)
2. 305 I (581A)
3. 305 � (581A)
4. 305 II (581M)
5. 305 Mk II (581M)
6. 305 II Break (581E)
7. 305 Mk II Break (581E)
8. 305 I Break (581D)
9. 305 � Break (581D)
10. 504 (A_, M_)
11. 504 Saloon (A_, M_)
12. 505 (551A)
13. 505 Break (551D)
14. J5 Bus (280P)
15. DUCATO Panorama (280_)
16. DUCATO Panorama (290_)
17. 504 Break (D_, F_)
18. 604 (561A_)
19. 604 Saloon (561A_)
20. J5 Bus (290P)
21. See more in applications

The principle of the thermostat work

The classic DT Spare Parts 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.