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. 900 I Combi Coupe
2. 900 � Combi Coupe
3. 9000 Hatchback
4. 900 I Convertible
5. 900 � Convertible
6. 9000
7. L 300 / DELICA II Bus (LO3_P/G, L0_2P)
8. EXPRESS II Bus (LO3_P/G, L0_2P, SA, SB, SC, SD, SE)
9. DELICA II Bus (LO3_P/G, L0_2P)
10. 900 II
11. 900 II Convertible
12. L 300 / DELICA II Van (L03_P)
13. EXPRESS II Van (L03_P, SA, SB, SC, SD, SE)
14. 900 I (AC4, AM4)
15. 900 � (AC4, AM4)
16. 900 II Coupe
17. F10
18. F4
19. F6
20. F7
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The principle of the thermostat work

The classic MAHLE ORIGINAL 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.