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. MAXIMA III (J30)
2. MAXIMA II Saloon (J30)
3. LAUREL (JC32)
4. PATROL III/2 Station Wagon (W260)
5. SAFARI III/2 Station Wagon (W260)
6. PATROL GR IV (Y60, GR)
7. PATROL IV (Y60, GR, GQ)
8. PATROL GR � (Y60, GR)
9. SAFARI IV (Y60, GR)
10. PATROL GR IV (Y60, GR, 260L)
11. PATHFINDER II (R50)
12. TERRANO II (R50)
13. PATHFINDER II SUV (R50)
14. PATROL GR V Wagon (Y61)
15. PATROL IV Station Wagon (Y61, GR_, GU)
16. PATROL GR Mk II Wagon (Y61)
17. SAFARI V Wagon (Y61)
18. PATROL III/2 Hardtop (K260)
19. PATROL / SAFARI III/2 Hardtop (K260)
20. CEDRIC (Y32)
21. 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.