How to replace the coolant. Flushing the engine cooling system

How to replace the coolant. Flushing the engine cooling system
Coolant the engine cooling system has a relatively long life, but the day comes when the antifreeze must be replaced with a new one.

2015-11-18 15:07:53 32

systemcooling systemcoolant engine cooling systemexpansion tankcoolant filleddraining antifreeze

When to change the coolant

In use in antifreeze decreases the amount of additives and loses its properties. The alkalinity level of the coolant constantly decreases, whereby it becomes aggressive in relation to rubber, which is made of connecting pipes and to metal surfaces of parts and mechanisms of the engine. Especially often suffer from corrosion of the radiator, water pump and cylinder block. In addition, the antifreeze begins to foam and worse gives off heat, whereby the engine starts to overheat, and the fan works more often than usual. That is why all car manufacturers specify the replacement cycle of antifreeze in 2-3 years after the start of operation or every 50-60 thousand kilometers. Unplanned coolant change is needed if using the faulty head gasket the antifreeze in cylinders reach the exhaust gases or the leak in the cooling system sucked in air, causing premature aging of the coolant. If the antifreeze is faded, stained a brownish color, it appeared the sediment or on the inner surface of the expansion tank forms a gel-like mass, the coolant must be replaced.

Drain coolant

To drain the antifreeze from cooling system it is necessary to wait for the motor to cool. Remove the cap from the neck of the expansion tank and radiator. Fully open the valve of the stove, place the container for collecting waste antifreeze under the drain hole of the cylinder block and Unscrew it from the tube, taking care to avoid getting coolant on your hands and body parts of the car. If this happens, immediately rinse them with water. The roaming capacity with the old antifreeze under the radiator. On the drain valve put the hose, drop the other end into a container and open the valve. If there is no valve on the radiator has a drain plug, Unscrew it. In the absence of tap or tube remove the lower radiator pipe.

Flushing cooling system

In a relatively new car, when particles of scale, dirt or rust in the drained antifreeze are not available, it is enough to wash the cooling system with distilled or boiled water with minimal salt content. To do this, simply rotate the tube on the engine block and the radiator, fill the system with water, run the engine and give him 10 minutes to work, after which the water from the cooling system is drained and the above described method. If the drained coolant to the naked eye are small particles of scale or rust, the cooling system should be flushed with an aqueous solution of weak vinegar. Not to experiment with vinegar, use a special washing liquid for the cooling system. Pour in a system flushing agent for 10 minutes, run the engine and then leave the liquid in the cooling system at the time specified in the instructions thereto. Merge "flushing", pour new and repeat the procedure. Upon completion, the cooling system flushed boiled or distilled water. a

Fill coolant

Is performed in the reverse order to the procedure of draining the antifreeze. Replace the drain plugs, close drain cocks or to put the fittings on the radiator. Disconnect the hose from the fitting of heating of the carburettor and fill the coolant system through the radiator neck, not forgetting to open the tap on the stove (putting a temperature controller on "high"). When fitting the heating of the carburettor will be joining the antifreeze, fill, suspend, put a hose on this fitting and fix it. Topped up the radiator with coolant, and then filled her expansion tank up to the level, which is 2-3 cm above the level of minimum liquid level. If, despite all our tricks, in the engine cooling system has formed an air tube, the characteristics of which will be a rapid warming of the engine at the same time cold with the radiator, thermostat and the stove, enough to drive the front wheels up on the hill to the front of the car was raised, and allow the engine 2-3 minutes to work. Upon completion of the check the level of antifreeze in the expansion tank and, if necessary, add it in the coolant.That's all, we wish that the cooling system of your car has always been good, the antifreeze is not boiling, and the engine did not overheat! You no nail, no wand!


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