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How To Replace A Thermostat In Your Car - YouTube

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The thermostat in any vehicle is one of the most critical aspect of the cooling system. It works based off the coolant temperature, by trapping coolant in a certain part of the car’s system, enabling the car’s engine to warm up steadily on a cold day. Then after the car reaches certain temperature, it opens and allows the coolant to fully circulate the engine, thus keeping the car’s engine at a regulated temperature. When it is broken and needs replacing the car will either take a very long time to get to operating temperature (meaning the thermostat is stuck open). Sometimes it will be stuck closed and blocking the coolant flow from the engine through to the radiator. When this happens, the vehicle will overheat. This article will illustrate the simple steps to follow when changing a thermostat in a car.

To actually test the thermostat, remove it from the thermostat housing in your car engine. To locate your thermostat, look to where the end of the top radiator hose leads on the engine. The housing will be at the end of the hose, and the thermostat is within the housing.

WHAT DOES A THERMOSTAT DO? - Cap-A-Radiator

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How to Replace Your Vehicle's Thermostat - For Dummies

­Any liquid-cooled car engine has a small device called the thermostat that sits between the and the . The thermostat in most cars is about 2 inches (5 cm) in diameter. Its job is to block the flow of coolant to the radiator until the engine has warmed up. When the engine is cold, no coolant flows through the engine. Once the engine reaches its operating temperature (generally about 200 degrees F, 95 degrees C), the thermostat opens. By letting the engine warm up as quickly as possible, the thermostat reduces engine wear, deposits and emissions.

Your car cooling system
Any liquid-cooled car engine has a small device called the thermostat that sits between the engine and the radiator. The thermostat in most cars is about 2 inches (5 cm) in diameter. Its job is to block the flow of coolant to the radiator until the engine has warmed up.
When the engine is cold, no coolant flows through the engine. Once the engine reaches its operating temperature (generally about 200 degrees F, 95 degrees C), the thermostat opens. By letting the engine warm up as quickly as possible, the thermostat reduces engine wear, deposits and emissions.
The secret of the thermostat lies in the small cylinder located on the engine-side of the device.
This cylinder is filled with a wax that begins to melt at perhaps 180 degrees F (different thermostats open at different temperatures, but 180 F/82 C is a common temperature). A rod connected to the valve presses into this wax. When the wax melts, it expands significantly and pushes the rod out of the cylinder, opening the valve.