Engine Cooling System


How it Works:

Your car heats up when it’s running. The cooling system begins operating as soon as the engine warms up. The coolant circulates in the engine’s water output via a water pump. It starts absorbing heat from the engine to bring the temperature down to an appropriate level.

The coolant expands and cracks open the paraffin wax of the thermostat upon reaching a temperature of 160 to 190 degrees Fahrenheit. The thermostat controls the coolant which then flows through the pipe and into the radiator causing the radiator fan to blow cool air. Coolant is returned to the water pump and then back into the water exit by the water pump, and the process is repeated once more.

Components of an engine cooling system:

  • Radiator
  • Radiator overflow tank
  • Radiator cooling fan
  • Thermostat
  • Hoses
  • Waterpump
  • Coolant temperature sensor
  • Freeze plugs

Engine cooling system types:

    1. Air cooling system:

      Instead of using coolant to cool the engine, the cooling system blows cold air.

    2. Liquid cooling system:

      The system uses a liquid coolant instead of cold air

The high temperature within the engine may melt or damage its parts. This is why a cooling system is required

Interior cooling system:

The inside of your car is kept cool by its A/C system. The air conditioning in your automobile can make hot air cold, which on a sweltering summer afternoon can seem miraculous. But contrary to popular belief, it’s not particularly difficult to chill that air.

Car A/C system parts:

There are 5 parts:

  1. Compressor
  2. Condenser
  3. Evaporator
  4. Thermal expansion valve
  5. Accumulator


It monitors and controls temperature output and moves air to the condenser. It also pumps the refrigerant to cool the air


The condenser works to lower the temperature and pressure of hot gases coming from the refrigerant. It also transfers the liquid refrigerant to the receiver/dryer or accumulator after it has been cooled.


Some A/C systems use an accumulator to temporarily store any liquid refrigerant to prevent it from entering the compressor, where it could cause harm, and to contain moisture inside the A/C system.

Thermal Valve:

They determine the correct amount of refrigerant that may safely be sent into the evaporator by monitoring the pressure and temperature of your A/C system.


 It is in charge of cooling the refrigerant-filled air before it is blown into your car’s cabin.