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. TRANSIT Bus (V_ _)
2. TRANSIT Bus (T_ _)
3. TRANSIT Bus (E_ _)
4. BX (XB-_)
5. 405 I (15B)
6. 405 I Saloon (15B)
7. 405 � (15B)
8. 405 I Break (15E)
9. 405 � Estate (15E)
10. 164 (164)
11. 164 Saloon (164)
12. P 1800 (P18)
13. 140 (142, 144)
14. 140 Saloon (142, 144)
15. PV 544 (P11)
16. 309 II (3C, 3A)
17. 309 Mk II (3C, 3A)
18. TRANSIT Van (T_ _)
19. TRANSIT Van (E_ _)
20. TRAFIC Platform/Chassis (P6)
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The principle of the thermostat work

The classic GATES 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.