THERMOSTAT COOLANT FOR OPEL ASTRA/Van/GTC/TwinTop SIGNUM/Hatchback VECTRA/GTS MAGNETI MARELLI 352067488000

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. ASTRA H Estate Van (L70)
2. ASTRA H Van (L70)
3. GRANDE PUNTO (199_)
4. PUNTO (199_)
5. CROMA (194_)
6. ASTRA H GTC (A04)
7. 9-3 Estate (E50)
8. ZAFIRA / ZAFIRA FAMILY B (A05)
9. 159 (939_)
10. 159 Saloon (939_)
11. ASTRA H TwinTop (A04)
12. ASTRA H (A04)
13. ASTRA H Estate (A04)
14. ASTRA Mk V (H) (A04)
15. ASTRA Mk V (H) Estate (A04)
16. VECTRA C Estate (Z02)
17. VECTRA C (Z02)
18. VECTRA C GTS (Z02)
19. ZAFIRA Mk II (B) (A05)
20. 9-3 Convertible (YS3F)
21. See more in applications

The principle of the thermostat work

The classic MAGNETI MARELLI 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.