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. PREGIO Van (TB)
2. BESTA Van (TB)
3. CARNIVAL I (UP)
4. SEDONA I (UP)
5. CARNIVAL II (GQ)
6. SEDONA II (GQ)
7. SEDONA Mk II (GQ)
8. CARNIVAL / SEDONA II (GQ)
9. CARNIVAL I (GQ)
10. TERRACAN (HP)
11. K2700 (SD)
12. K2700 Platform/Chassis (SD)
13. FRONTIER (SD)
14. BONGO III (SD)
15. CARNIVAL / GRAND CARNIVAL III (VQ)
16. SEDONA III (VQ)
17. GRAND SEDONA III (VQ)
18. SEDONA Mk II (VQ)
19. CARNIVAL / GRAND CARNIVAL II (VQ)
20. VQ III (VQ)
21. See more in applications

The principle of the thermostat work

The classic DENSO 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.