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. HIACE IV Bus (_H1_)
2. REGIUS IV Bus (_H1_)
3. HIACE IV MPV (_H1_)
4. DYNA IV Bus (_H1_)
5. HIACE / COMMUTER IV Bus (_H1_)
6. QUANTUM IV Bus (_H1_)
7. HIACE IV Bus (__H1_, __H2_)
8. HIACE IV Van (_H1_)
9. HILUX VI Pickup (_N1_)
10. TACOMA VI Pickup (_N1_)
11. HILUX MIGHTY X / HILUX TIGER VI Pickup (_N1_)
12. MONDEO III Turnier (BWY)
13. MONDEO III Clipper (BWY)
14. HIACE IV Van (__H1_, __H2_)
15. HIACE SBV IV Van (__H1_, __H2_)
16. BOXER Bus
17. MANAGER Bus
18. BOXER Van
19. MANAGER Van
20. BOXER Platform/Chassis
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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.