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. WRANGLER I (YJ, SJ_)
2. WRANGLER � (YJ, SJ_)
3. CHEROKEE (XJ)
4. WAGONEER (XJ)
5. CHEROKEE SUV (XJ)
6. GRAND CHEROKEE I (ZJ, ZG)
7. GRAND CHEROKEE � (ZJ, ZG)
8. GRAND CHEROKEE I SUV (ZJ, ZG)
9. GRAND CHEROKEE II (WJ, WG)
10. GRAND CHEROKEE Mk II (WJ, WG)
11. GRAND CHEROKEE II SUV (WJ, WG)
12. WRANGLER II (TJ)
13. WRANGLER / TJ II (TJ)
14. WRANGLER Mk II (TJ)
15. See more in applications

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.