From the expansion tank antifreeze escapes – a problem that sooner or later every driver is faced with. At the same time, there may be no leaks, and the antifreeze level drops. There are several reasons for this and it is possible to recognize the malfunction yourself with proper attention. If the cause of the antifreeze leak was a serious accident, then it makes sense to think about taking the car for recycling:

What is the antifreeze needed for

Antifreeze, toluene and coolants are different names of the liquid mixture that is poured into the engine cooling system. It is resistant to freezing and tolerates frost well. It is necessary to prevent the engine of a car from freezing in frosty weather, as well as to remove excess heat from it. It influences optimal functioning of a vehicle.

Signs of antifreeze leakage

It is possible to detect that antifreeze escapes from the expanded tank, but the situation will be complicated if there are no leaks. Therefore, it is important to know the first signs of antifreeze leakage from the

Interruptions in the operation of the heater. Possible delivery of cold air instead of warm air;

Wet floor in the cabin. The cause is not water, but something more oily;

Change of consistency of engine oil, presence of bubbles;

The smell of antifreeze in the car. Has a sweet odor;

Light smoke from the muffler;

Increased oil consumption;

Sign of engine overheating on the car dashboard;

Wear of pistons;

Decreased fluid level in the expansion tank;

Leaks under the hood or under the car while standing;

Abnormal operation of the dashboard thermometer hand;

Regular overheating of the vehicle;

Steam from the vehicle’s expansion tank after opening the cap.

There are cases when several signs appear at the same time, which will indicate a long-standing malfunction of the car and the need to repair the cooling system.

Causes of antifreeze leakage

A sharp decrease in the antifreeze in the expansion tank of the car is a signal that can not be ignored. Otherwise, it will entail additional breakdowns and repair of other parts of the car. The presence of leaks will greatly facilitate a car owner’s task. Initially, it is desirable to perform a diagnosis of the entire cooling system of the car. If there are no leaks and the antifreeze from the expansion tank decreases, the task becomes much more difficult, and it becomes more difficult to notice the malfunction. That is why it is important to know all the causes of the withdrawal of antifreeze from the tank and try to avoid them.

The main causes are:

Damage of the cap of the expansion tank. Sometimes because of their very small size they are impossible to notice;

Failure of the pump gland seal. Antifreeze will escape from the water pump;

Rupture of the cylinder head gasket. In this case, the antifreeze will go into the engine oil, due to which bubbles will form in the oil and white smoke will appear from the muffler;

Cracks on the radiator. In this case there will be leaks;

Wear of the sealant. In this case, the antifreeze goes under the thermostat;

Damage of a part of the cooling system, namely wear of hoses.

In winter, in frosty weather, a slight increase of antifreeze flow rate is possible, and it is often mistaken for a malfunction of the cooling system. It is worth to be attentive to this and make sure that everything is working properly.

Leaking antifreeze: causes

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