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Your reservoir may be low. This will trigger the coolant light. It is often a malfunctioning sensor and nothing is actually wrong with the cooling system or coolant. It can be easily replaced. Alternatively you can leave it, but monitor your engine temperature and coolant level.
Nothing will happen if you drain the cooling system and replace the coolant.
Low coolant level or faulty coolant level senser. Did a radiator flush and replaced water bottle with sensor... still nothing.
The engine coolant temperature sensor has nothing to do with the low coolant light. The low coolant sensor is mounted in the bottom of the overflow/filling reservoir by your washer fluid bottle. You will need to verify that the coolant overflow/fill bottle has coolant in it and if it does then the sensor is bad and will have to be replaced.
Nothing if you drain it out and flush the cooling system. Oil is not a good coolant, and the water pump will have a hard time pumping it, so the vehicle will overheat if you do not remove the oil.
None - the emissions from a cooling tower is nothing more than steam.
Defective cooling fan or thermal switch. (NEW ANSWER) First check and make sure you have enough coolant in the radiator....normally about two gallons...nothing less(when the radiator is empty).....if you check your coolant level and it is low....add coolant...not water!!!....if it still overheats when sitting, either your thermostat is not opening when at the set temperature....in which case you will have to replace the thermostat....or the cooling fan isn't comming on at the set temperature in which case you will have to replace either the fan switch or fan relay. If you suspect the cooling fan, replace the fan switch first and fan relay last. But if the corrisca is overheating and the cooling fan is comming...then you can rule out the cooling fan and look towards the thermostat being the problem.
How the water pump looks means nothing. If it is leaking, noisey, or is not pumping sufficent coolant, it is bad and needs replacing.
Nothing all overfloo is extra coolant latter the car will be are on the normal level of coolant after a couple miles.of drive.
If by DMA you mean Direct Memory Access, nothing has replaced it.
Nothing yet.
Nothing has replaced the hammer. Many of us still have several and will use them forever.