Thermostat, coolant - 4270.88D BorgWarner (Wahler)

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. SIERRA (GBG, GB4)
2. SIERRA Hatchback (GBC, GBG)
3. SCORPIO I (GAE, GGE)
4. GRANADA Mk III� (GAE, GGE)
5. GRANADA I (GAE, GGE)
6. SCORPIO I Saloon (GGE)
7. GRANADA Mk III� Saloon (GGE)
8. GRANADA Mk III Saloon (GGE)
9. FIESTA III (GFJ)
10. FIESTA Mk III (GFJ)
11. FIESTA Van (F3L, F5L)
12. COURIER Van (F3L, F5L)
13. ESCORT V (AAL, ABL)
14. ESCORT Mk VI (AAL, ABL)
15. ORION III (GAL)
16. VERONA III (GAL)
17. TRANSIT Bus (E_ _)
18. MONDEO I (GBP)
19. MONDEO � (GBP)
20. MONDEO I Saloon (GBP)
21. See more in applications

The principle of the thermostat work

The classic BorgWarner (Wahler) 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.