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In general, water is the best medium as cooling water is used to cool the heat. However, the disadvantage of water is the fact that it cannot be used below 0oc. Therefore, in order to be able to use water during winter and prevent corrosion of cooling system caused by various ions in the water, water is mixed with anti-freeze. This is why antifreeze is often called 'antifreeze' or 'coolant'. In general, antifreeze means the antifreeze used in the cooling water system that has the function of rust prevention. Thus, if good antifreeze is used, the car can be safely run for four seasons without car damage.
However, drivers can be in a difficult situation once in a while due to engine overheating. The cause of overheating is manifold. In case the car is overheated, first open the hood and find the auxiliary cooling tank that fills antifreeze. If the coolant is completely exhausted, the cooling efficiency to cool the engine drops and then the overheating occurs. When this occurs, the problem will be resolved by refilling the tank with water or antifreeze. Though there are many reasons why coolant is consumed, a faulty hose connection is the main cause. Consult a local car center or A/S center to correct the faulty connecting part.
The second most common cause of coolant consumption is due to a faulty water temperature controller. The water temperature controller has a function to control coolant flow rate to the front radiator and fan so that the coolant won't overcool the engine. In other word, when the engine is cold, the controller stops the coolant flow to the radiator and fan to prevent overcooling and thus the heat loss is reduced. When the engine is hot, the controller lets the coolant flow to the radiator and fan sufficiently cool the coolant so that the cooled coolant can function properly in the engine room (Thus, one can view that a cooling system of a car consists of two types: 1) water-cooled type where the engine is cooled by cooling water, 2) air-cooled type where heated coolant from engine room is cooled by radiator and fan.)
This water temperature controller uses wax pellet-type and the basic temperature at which cooling water flow stops is 88oc. When the controller does not function properly, coolant is overheated and then starts to leak through a weak part. It also leaks from the auxiliary tank. When the leaked coolant touches hot parts, much steam are generated at once and white fume appears as if on fire. In this case, immediately consult the nearest car center or A/S center and fix the problem. Though it is not fatal to the car right away, it indicates engine overheating. Please be calm and act quickly. In a deserted area, turn off the engine and wait for emergency truck while cooling the engine. After the engine is sufficiently cooled, check the nearby service-center as soon as possible.
Other possible causes of overheating include faulty cooling water pump, compressed air leak due to faulty cylinder head gasket and blockage of radiator core, etc. |
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