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What are the functions of the thermostat in the car?

Author: Mark Douglas Motorworks
by Mark Douglas Motorworks
Posted: Apr 25, 2020

The thermostat plays an important role in the performance of the car as it helps to keep the temperature of the engine at an optimum level. The internal combustion engine generates a lot of energy in the form of heat. The generation of heat on such a huge scale could trigger engine overheating and could cause irreparable damages to the car. The cooling system protects the engine by absorbing the excess amount of heat generated from the engine.

The thermostat is an important component of the cooling system of the car which helps to optimize the temperature of the engine in order to prevent engine overheating and at the same time, it maintains the operating temperature for the engine. Malfunctions in the thermostat might cause engine overheating which could bring down the car to a halt in the middle of nowhere. So, signs which warn about the malfunctions associated with the thermostat should not be overlooking. The thermostat should be subjected to inspection and malfunctions in those components should be repaired immediately.

Working principle of a car thermostat:

The thermostat is a small device located between the radiator and the engine. The main function of the thermostat is to control the flow of coolant from the engine to the radiator. If the thermostat is closed, then the coolant could not flow from the engine to the radiator which increases the engine temperature. Similarly, if opened, coolant flows from the engine to the radiator in order to keep the temperature of the engine at an optimum level.

The coolant circulated throughout the engine absorbs the excess amount of heat energy from the engine and thus prevents the engine from overheating. The thermostat plays an important role in the performance of the cooling system as it acts as a valve and regulates the coolant flow from the engine to the radiator and vice versa.

The thermostat works by monitoring the temperature of the engine coolant. It contains a cylinder filled with wax. This part of the coolant maintains direct contact with the coolant circulating in the engine. As the engine coolant temperature rises, it melts the wax which expands and pushes the rod outward and opens the valve. A hot engine coolant now flows to the radiator. By doing so, thermostat optimizes the temperature of the engine and keeps the engine in working order.

Symptoms of a defective thermostat:

A defective thermostat could not work efficiently. An inefficient thermostat might jeopardize the cooling system of the car which might cause irreparable damage to the car. So, the condition of the thermostat should be subjected to inspection on a regular basis and warning signs which indicates that the thermostat has some sort of abnormalities that should not be ignored.

Engine overheating:

The thermostat used in the cooling system helps to keep the engine temperature at the optimal level. Malfunctions in the thermostat jeopardize the cooling system and could cause engine overheating. So, such warning signs should not be ignored. It should be repaired immediately.

The engine under heating:

A defective thermostat could not regulate the flow of the coolant between the engine and the radiator. Continuous supply of the coolant to the engine might reduce the engine temperature which could affect the power output of the engine.

Inefficient engine:

A bad thermostat could not keep the engine temperature at an operational level and might have a negative influence on the power output of the engine. So, warning signs which indicate that the thermostat has defects should not be ignored.

Thermostat maintenance:

Some people are unaware of the importance of a thermostat in the performance of the vehicle. Any signs which indicate that the thermostat has malfunctions should not be ignored as it could cause irreparable damage to the engine. Regular inspection of the thermostat helps a lot to evaluate the condition of the thermostat. The defective thermostat should be replaced immediately in order to keep the engine temperature at the operational level.

Key takeaways:

The thermostat plays a key role in the performance of the cooling system. It helps to keep the engine temperature at an operational level. Defects in the thermostat might bring down the engine to a halt and could cause irreparable damages to the engine. So, warning signs which indicate that the thermostat has defects should not be ignored. The reasons behind the appearance of such warning signs should be identified and repaired immediately to avoid any major mechanical issues in the car.

About the Author

Mark Douglas Motorworks is a family owned and operated auto repair shop, giving service to all European and exotic cars like Aston Martin, Audi, Bentley, BMW, Mercedes, Maserati, Ferrari, Jaguar, Land rover, Porsche and Rolls Royce.

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Author: Mark Douglas Motorworks

Mark Douglas Motorworks

Member since: Apr 22, 2020
Published articles: 1

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