Thermostat, coolant - 819719 VALEO

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. LANCER VIII (CY_A, CZ_A)
2. LANCER VIII (CY_A, CZ_A, CJ)
3. GALANT FORTIS VIII (CY_A, CZ_A)
4. LANCER FORTIS VIII (CY_A, CZ_A)
5. LANCER SERIE R VIII (CY_A, CZ_A)
6. LANCER EX VIII (CY_A, CZ_A)
7. LANCER VIII Sportback (CX_A)
8. LANCER VIII Sportback (CX_A, CJ)
9. GALANT FORTIS VIII Sportback (CX_A)
10. LANCER SERIE R VIII Sportback (CX_A)
11. LANCER EX VIII Sportback (CX_A)
12. COLT VI (Z3_A, Z2_A)
13. COLT VI (Z3_A, Z2_A, RG)
14. MIRAGE VI (Z3_A, Z2_A)
15. ASX (GA_W_)
16. ASX (GA_W_, XA, XB, XC, XD)
17. RVR (GA_W_)
18. RVR ROADEST (GA_W_)
19. ASX SUV (GA_W_)
20. OUTLANDER SPORT (GA_W_)
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.