Thermostat, coolant - ADJ139209 BLUE PRINT

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. V60 I (155, 157)
2. S80 II (124)
3. S80 II Saloon (124)
4. XC70 II (136)
5. XC70 II Estate (136)
6. XC70 II SUV (136)
7. V70 III (135)
8. XC90 I (275)
9. XC90 I SUV (275)
10. XC60 (156)
11. XC60 SUV (156)
12. S60 II (134)
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The principle of the thermostat work

The classic BLUE PRINT 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.