What is the problem when my 98 Daewoo Lanos uses water and overheats?

My Daewoo Lanos is now using litres of water everytime I use it. There is no green colour left in the coolant, its just brown water.





I have to fill the radiator coolant tank up every 15mins.





Do I just need to flush it and put in new radiator coolant?





Or is there a bigger problem?|||There is an obvious leak in your system. The problem is to locate the leak/s.





It can be leaking from many places, the radiator, the various hoses, even internal engine leaks.





At times this can cost a few dollars for a new hose, and at other times it is a major repair.





You sound somewhat inexperienced. Still you might be able to see where the leak occurs. Just do not open a hot engine and have yourself sprayed with super hot boiling water -- that can be extremely dangerous.





Bigger problem -- however, how big is the question.|||Well I don't want to make a mountain out of a mole hill but if your using water that fast something is definitely wrong.





Things to check first would be, radiator, hoses and thermostat housing and water pump.





These are the small issues it could be. Second and a larger issue would be to drain and check the coolant, and also check the oil.





If you are "making" oil, ie the oil lvl is much higher then it should be, it looks like a coffee with milk color, or there is oil in the coolant, you have a bigger problem, ie blown head gasket.





I would hope its the latter. Good luck|||Check water pump, stuck thermostat, and possible head gasket bad. A good mechanic should be able to tell you what it is right away. Those are the bad ones, don't dismiss the simple though. I have seen the plastic overflow have a small hole worn in the bottom on a seam which leaked water which overheated the engine|||are you saying you put water in your radiator cause your gonna make me face palm.





I'd say however,flush the thing completely and refill it with coolant.