As far as combustion take place in an automobile engine, cooling system are needed to keep the engine at normal operating temperature. The main purpose of article is to discuss on thermostat which is one of the components of automobile cooling system. you’ll get to know how thermostat works on this page.

How Thermostat Works

Thermostat is a small device used in an automobile engine to restrict the flow of coolant towards the radiator. It is also used to detect the temperature of coolants in the engine. The thermostat in most vehicles is about 2 inches (5 cm) in diameter. When the engine cold, no coolant is allowed to pass through the engine until it reaches the engine operating temperature.

The thermostat on the other end, acts as a regulating valve to control the coolant flow into the radiator and maintain the engine temperature within optimum range. The thermostat consist of a chamber filled with wax and rod which is pressed against it. When the coolant pressing through the thermostat is at higher temperature (usually 180f), the wax begins to melt. The melting causes thermal expansion of the wax, which in turn pushes the rod and thereby allowing the coolant to flow outside. The coolant pass through the thermostat valve and enters into the radiator upper tank through the upper radiator hose.

One of the disadvantages of thermostat is that, when it get faulty while it was lock the hot coolant will be unable to flow. As the most dangerous expect in an automobile engine, overheating will occurs. But it get faulty while the thermostat is open, the car owner is said to be lucky. The coolant will pass freely to the radiator without absorbing any heat and excessive cooling will also cause a reduction in engine performance by reducing combustion efficiency.