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. 19 II (B/C53_)
2. 19 Mk II (B/C53_)
3. LAGUNA I (B56_, 556_)
4. CLIO I (B/C57_, 5/357_)
5. LUTECIA I (B/C57_, 5/357_)
6. 19 II Chamade (L53_)
7. 19 Mk II Chamade (L53_)
8. 21 Estate (K48_)
9. 21 Savanna (K48_)
10. LAGUNA I Grandtour (K56_)
11. LAGUNA I Nevada (K56_)
12. LAGUNA I Estate (K56_)
13. MEGANE I (BA0/1_)
14. MEGANE I Coach (DA0/1_)
15. MEGANE I Coupe (DA0/1_)
16. 21 Saloon (L48_)
17. SPORT SPIDER (EF0_)
18. 19 I Hatchback Van (S53_)
19. 19 � Hatchback Van (S53_)
20. 19 II Hatchback Van (S53_)
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The principle of the thermostat work

The classic FEBI BILSTEIN 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.