How Engine Cooling System Works?

How Engine Cooling System Works?


Going on a lengthy journey, checking your vehicle's water, waiting for what they're not running on diesel or gasoline. Yeah, well, why then we need water. To maintain it in optimum operating temperature range, water is distributed in the engine. Yes, we have an optimum temperature range, we can't overcool it, nor can we allow it to go beyond a secure temperature threshold.

Imagine what would happen if your motor cooling system doesn't work correctly, because of the growth of piston rings owing to unnecessary pressure, you'll end up sticking the piston rings to your engine compartment walls. So now that we need to comprehend how it operates is very evident.

Main Components of Engine Cooling System

1. Water pump 

The core of the engine cooling system is said to be. Inside its enclosure, the water pump has a radial impeller powered by the motor itself. The serpentine belt is used to supply the water pump pulley with rotational motion of the primary pulley of the engine.

2. Radiator 

Radiator serves as an engine heat exchanger. It is generally produced of aluminum and is fitted with loads of tiny diameter tubes with fins. It shares with the adjacent air the heat of warm water coming from the engine. It also has an inlet port, an outlet port, a drain connector and a pressure cap.

3. Thermostat 

It is the thermostat that operates as a coolant valve and only after reaching a certain temperature range enables it to pass through the radiator. Thermostat has paraffin wax in it, which at that temperature spreads and closes it up.

4. Coolant 

Temperature Sensor As the name indicates, in the engine cooling system, it is a temperature measuring tool that controls the engine temperature. It offers the information necessary for controlling radiator fan function. The temperature display of the engine at the driver's console is based on the information supplied by the temperature sensor of the coolant. In addition, its information is used in ECU-controlled cars to optimize motor gas injection and ignition timing for greater car efficiency.

5. Rubber Hoses 

These rubber hoses are required in the engine cooling system to connect the water pump, radiator and engine to allow water or coolant to flow through them to complete the circuit.

6. Radiator 

overflow reservoir Usually installed near the radiator, it is a metal reservoir with an inlet channel linked to the radiator and one overflow outlet. It's the same tank you placed before you run in water.


Because of the stress generated by the gasses formed as a consequence of burning air-fuel mixture, the piston passes up and down in the engine cylinder. We have water valves in the engine block along the length of the engine cylinder, and these vents circulate through the top of the engine and extract the heat in the finest feasible manner with flowing water from the engine.

Let's begin with the air tank and let's just begin the motor and it's hot. The inlet and outlet of the water tank are linked to the motor using rubber hoses. We have thermostat installed in the attachment route to the engine, so water is carried into the motor water pipes by this radial pump through thermostat, thermostat does not allow the water to enter the radiator system until the motor is at low temperature, and water returns to pump through the outlet hose. The temperature sensor of the coolant is installed close to the thermostat.

It gets heat from the engine as water continues to circulate and its temperature increases. It melts and closes the paraffin wax in the thermostat as it approaches a temperature between 160 and 190 Fahrenheit. So now through the radiator system, this warm water is circulating.

Through the inlet port, water reaches the radiator and exchanges heat with air as it passes through the amount of tiny radiator tubes and with the assistance of propellers connected to these tubes. But as the engine is operating at greater rpm, the temperature of the engine is rising, so is the temperature of the coolant. This coolant is heated to such a elevated temperature that a high-pressure radiator environment would be created. If such a high pressure continues to increase, the radiator pipes would be bust out, which in any case we don't want. So we have a pressure cap and a radiator overflow reservoir to handle this stress.

When the stress in the radiator exceeds a stress of up to 15 psi, it raises the lever in the pressure cap, thus opening a port to move the coolant to the radiator overflow tank, thus maintaining the gas in check. When the coolant that goes into the overflow tank reaches its size boundaries, it passes through the overflow hose from the tank.  It produces a vacuum in the radiator when the stress falls in the radiator, thus bringing the coolant back from the overflow tank to the radiator. That's why, before we go out for a trip, we fill the radiator overflow tank. If the coolant concentration drops below the minimum threshold.

Radiator fan begins operating in the engine cooling system when the temperature reaches a specific temperature value. It enables to lower the temperature of the coolant by pushing water through radiator valves, thereby separating water from the coolant at a quicker pace. It is controlled by the temperature sensor information from the coolant.

Coolant temperature sensor is a multi-purpose sensor as it requires information to optimize the efficiency of contemporary ECU motors.

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