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Coolant refers to an anti-freeze/water mixture used to cool down the engine. It has the capability to move the heat generated by burning fuel in the engine's cylinders to the radiator, where the coolant is cooled down. Engine coolant prevents freeze-up in winter, raises the boiling point in summer, and protects the cooling system from rust and corrosion 

  • It is used to regulate the temperature of the system. 
  • It contains high thermal capacity and low viscosity 
  • It helps prevent damages such as corrosion from the water pump, head gasket, piston, and the cylinder
  • Engine coolant can maintain its liquid or gaseous phase and has the capability to undergo a phase transition through latent heat