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. 123 Saloon (W123)
2. 123 T-Model (S123)
3. 123 Break (S123)
4. 124 T-Model (S124)
5. 124 Break (S124)
6. 123 Coupe (C123)
7. G-CLASS (W460)
8. T1 Van (601, 611)
9. HENSCHEL 2-t
10. T1 Bus (601)
11. T1 Platform/Chassis (601)
12. MB Bus (631)
13. T1 Van (602)
14. T1 Platform/Chassis (602)
15. MB Van (631)
16. G-MODELL (W460)
17. MB Platform/Chassis (631)
18. T2/L Van
19. T2/L Platform/Chassis
20. T2/LN1 Van
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.