Failed thermostat.
No thermostat, no coolant, no waterpump. Basically you have no coolant circulating.
Low coolant? Thermostat not opening? Water pump not circulating coolant?
Low coolant? Cooling fan not working? Thermostat not opening? Water pump not circulating coolant?
Coolant mixed with a little air circulating thru the heater core. Check the coolant level in the reservoir.
AnswerThis is a symptom of an overheating engine. See "Related Questions" below for an excellent trouble-shooting guide to overheating problem.
That is were the coolant goes when it expands. Sounds like coolant isn't circulating or it is being forced out of the system.
pluged cooling fins in and on the radiador
it is normal, when the coolant is hot and pressure built, the pressure cap allows the coolant to drain to reservoir to reduce pressure in the cooling system But, if it continually does this whereby the reservoir overflows and the vehicle overheats due to a lack of coolant actually in the radiator when cool, there may be an overheating problem or blown head gasket on the engine.
There may be other reasons for the vehicle to be overheating but yes if you have let the reservoir run dry then it wont have suction to draw fluid back into the radiator so you will have to fill the radiator as well.
Check the coolant level in the reservoir. If that's up and the vehicle isn't overheating, you probably have a bad sensor.
Low coolant? Cooling fan not working? Thermostat not opening? Radiator restricted or plugged? Water pump not circulating coolant? System airbound?
Low coolant? System air bound? Hoses collapsing under pressure? Water pump not circulating coolant?