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. CRESSIDA Saloon (_X6_)
2. CRESSIDA Saloon (MX62, _X6_)
3. CRESSIDA Station Wagon (_X6_)
4. HIACE III Bus (_H5_, _H6_, _H7_, _H8_, _H9_)
5. HIACE III Van (_H5_, _H6_, _H7_, _H8_, _H9_)
6. LAND CRUISER PRADO (_J12_)
7. bB I (NCP3_)
8. HIACE II Bus (_H11, _H2_, _H3_, _H4_)
9. HILUX IV Pickup (_N5_, _N6_)
10. HIACE II Pickup (_H11, _H2_, _H3_, _H4_)
11. DYNA 100 Platform/Chassis (LY1_, YY1_)
12. See more in applications

The principle of the thermostat work

The classic VALEO 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.