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. LAND CRUISER (_J6_)
2. WILDCAT/ROCKY (F70)
3. WILDCAT/ROCKY (F75)
4. ROCKY Soft Top (F7, F8)
5. FOURTRAK (F7, F8)
6. ROCKY Hard Top (F7, F8)
7. ROCKY Hard Top Hardtop, Wagon (F7, F8)
8. LAND CRUISER (_J7_)
9. CAREVACA (_J7_)
10. LAND CRUISER PRADO (_J7_)
11. LAND CRUISER Pickup (_J4_)
12. BANDEIRANTE Pickup (_J4_)
13. LAND CRUISER (_J4_, _J5_)
14. BANDEIRANTE SUV (_J4_, _J5_)
15. DYNA 300 Platform/Chassis
16. DYNA 150 Platform/Chassis (LY_)
17. RUGGER
18. FOURTRAK
19. DELTA Bus
20. 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.