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. MX-5 II (NB)
2. MX-5 Mk II (NB)
3. ROADSTER II (NB)
4. MIATA II (NB)
5. 323 S VI (BJ)
6. 323 PROTEGE VI (BJ)
7. PROTEGE VI (BJ)
8. ALLEGRO MK VIII (BJ)
9. 323 S Mk VI (BJ)
10. FAMILIA VI (BJ)
11. ETUDE VI (BJ)
12. 323 F VI (BJ)
13. 323 ASTINA VI (BJ)
14. PROTEGE5 VI (BJ)
15. 323 F/P Mk VI (BJ)
16. B-SERIE (UN)
17. B-SERIE BRAVO Pickup (UN)
18. PROCEED (UN)
19. B-SERIE SUV (UN)
20. BOUNTY (UN)
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The principle of the thermostat work

The classic METZGER 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.