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Because the engine cooling fan does not work properly or does not work at all.


There are many reasons which may cause Engine overheat. the above is also one of them.

  • Loss of coolant
  • loss of coolant because coolant leaks from anywhere on the cooling system.
  • Loss of coolant because radiator cap is broken and will cause overheat.
  • Loss of coolant because radiator cap pressure is less than the required.
  • Loss of coolant because compression leak in to the cooling system.
  • Radiator internally blocked. (Heat exchanger blocked, if equipped)
  • Radiator externally blocked. (Air flow blocked)
  • Engine Overloaded (engine can be overloaded because of loss of power due to malfunction of some parts, in this case there must have other symptoms).
  • Thermostat does not direct water circulation to the Heat Exchanger.
  • Engine mechanical condition is not good (Power balance)
  • Engine ignition timing is retarded.
  • After a repair Engine started to overheat.(AC or Radiator fan is rotating wrong direction, polarity changed)
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15y ago

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