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The thermostat is stuck, or the engine coolant level is too low to circulate properly. In either case, have it looked after immediately before you cause serious engine damage.
The thermostat is a valve that opens to allow coolant circulation around the engine when the temperature of the coolant has reached the normal operating temperature of the engine. Once the thermostat opens, it allows circulation of the hot coolant through the radiator and also through the heater core which heats the interior of the vehicle.
If it opens too early, the engine runs too cool and will not be as efficient. This could also cause considerable wear on moving componenets designed to fit properly at a higher temperature.
If it opens too late, overheating will occur, resulting in excess wear for essentially the same reason.
If it does not open at all, the result can be extreme overheating resulting in a blown head gasket, complete coolant loss and a seized engine. These are extremely costly repairs.
Have the problem looked at before it reaches this point.
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∙ 13y ago
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