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Engine Overheating

When an engine is overheated, it is common that it will begin to miss. The engine over-temperature "idiot" light, and the fact that the engine dies, suggests a confirmation of overheating.

You ask, how could it be overheating if it it full off coolant ["antifreeze"]?

There are several possibilities as to cause [all based on lack of proper coolant flow] and the following are those that I can think of at the moment:

  • A collapsed or damaged radiator hose restricting coolant flow.
  • The coolant thermostat is not working properly.
  • There is an accumulation of "trash" and "debris" and/or corrosion inside the coolant galleries [passages] in the engine, head (s), and or tubes of the radiator.
  • If the vehicle is equipped with an electrically operated radiator cooling fan, the fan is not operating [bad sensor switch, loose or disconnected connector, cut wire, "bad" fan motor, etc.].

Again, there are probably some other causes I can't recall now.

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15y ago

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