The engine emulsion: possible causes and consequences. Diagnosis and repair of the engine

Masters who professionally service cars are advised to change the oil every 10 thousand kilometers. However, even if these recommendations are followed, car owners see that the engine has an emulsion. In consistence, it looks like mayonnaise. This composition leads and experienced car owners, and beginners in a real shock. This liquid may have different colors. What is it and how dangerous is the emulsion? The answers to these questions will be considered in our today's article.

Emulsion - what is it and where does it come from?

Lubricants for automobile engines, which can be purchased at any car dealership, are made on the basis of hydrocarbons. During combustion of the combustible mixture, combustion products are formed. Gasolines can contain water, alcohol, acid, peroxide. Then these substances during the operation of the motor are mixed with oil. As a result, the engine has an emulsion. It appears on the lid of the filler neck or on the dipstick to check the level of lubrication. Many are interested in the reasons for the formation of an emulsion on the lid and on the dipstick. This can be easily explained. Due to the large number of small bubbles, the emulsion becomes white. This indicates that the oil is very dirty. Also, the dipstick and the lid are the coolest elements of the engine. Therefore, the liquid accumulates well on these elements.

Emulsion in the engine: causes

Experienced car owners and people involved in servicing cars say that there are many reasons for the formation of an emulsion. Often these white mixtures can form when a coolant enters the crankcase. This can be observed if the cylinder head gasket is broken. In addition, if an emulsion is formed in the engine oil, it is worth checking the cylinder head and the unit. Cracks are possible in these parts. Another reason that the coolant gets into the crankcase is the deformed elements of the cylinder head. In winter, the emulsion appears due to condensation.

Also, the "mayonnaise" in the engine can appear if there is no gas ventilation system or it is insufficient. The temperature of the crankcase gases is quite high. Their composition includes water in large quantities. This water is then condensed out at the top of the power unit. And as a result, an emulsion appears. To find out the exact reason for the appearance of so scary all "mayonnaise", serious engine diagnostics are needed . The price for similar services is much lower than the cost of overhauling the engine. Self-determination of the causes can be quite difficult.

But, as practice shows, the reason lies in the punctured cylinder head gasket. Therefore, antifreeze or antifreeze can freely penetrate into the lubrication channels. There it will be mixed with engine oil. It must be said that if the coolant enters the lubricating system, the latter immediately loses all the characteristics. Specialists recommend replacing both oil and coolants. This is true for all power units, regardless of the type of fuel and design.

"Mayonnaise" occurs in the engine of any car if the owner neglects the regulations and does not service the machine or if there are any serious damages. Often with the advent of the emulsion collide in autumn and winter - with the first frosts and simply lowering the temperature. But do not immediately hit all the bells - not every time you need a diagnosis of the engine. The price of it in different cities of Russia ranges from 800 r. and higher. Often the reason for everything is ordinary condensate, which was formed because of the temperature difference between the hot motor and the street air. When the engine gets warm enough, all moisture from the oil will go away. However, the part will accumulate, and as a result, an emulsion will appear on the neck. This disease affects many models of cars. Including "GAZel".

Effects

When condensate, water, coolant gets into the engine oil, an emulsion is produced in the engine. Consequences - the lubricant will very quickly lose its lubricating properties and technical characteristics. In winter, oil sometimes even crystallizes, which is not very good for the power unit. A weak oil film leads to intensive wear of almost every part.

In such situations, the motor will jam, and then the car owner will know how much the overhaul of the engine costs (from 20 thousand rubles). Therefore, if you managed to notice the emulsion, you should find the reasons and immediately eliminate them.

Condensate

This problem is faced by car owners who store them in the garage. Also emulsion is seen by those motorists whose car is in the yard. If the car sleeps on the street every day, moisture vapor will regularly fall into the crankcase during the rainy months. They will then condense in tubes and oil lines. At one time, up to several grams of condensate can enter the motor. This is enough to emulsify the engine. Bubbles will be clearly visible not only on the cap of the filler neck, but also on the dipstick. In winter, car owners will often observe the effect of "mayonnaise". If the car is operated constantly and intensively, but at short distances, the engine corny does not have time to warm up to the operating temperature. This is another reason, because of which condensation appears. You can treat the problem by longer runs or by warming up to the operating temperature.

Faults in the Crankcase System

If the ventilation system is clogged and does not perform its functions completely, both gases and vapors along with them will tend to exit through the dipstick or any other places in the motor. Therefore, it is not surprising that the engine emulsion falls precisely on the lid of the neck. It remains to be pleased, because the lubricant in this case is clean. If you repair the crankcase ventilation system, then the oil change will not be necessary.

Coolant

This is the most common source of problems. When the coolant passes through the damaged cylinder head gasket, the high-pressure antifreeze gets into the oil channels. In the lubrication system, the pressure is much lower.

Methods of diagnosis

To check, the oil is drained from the warm motor into the tank. In the heated oil, even an inexperienced car owner can see traces of the coolant. If the antifreeze contains a lot of water, most of the liquid will fall out at the bottom of the crankcase. Then this liquid will be sucked into the oil receiver. If the emulsion is yellow, then it is better to operate from the operation of the machine. The mixture will kill the lubricating channels. This will lead to the failure of connecting rods, piston rings. The engine valve may be damaged.

Cracks in the cylinder head and the breakdown of the gasket

If there was an emulsion on the throat cover, then often the reasons for this phenomenon in violation of the integrity of the cylinder head gasket. Breakdown occurs due to overheating or as a result of wear. But this can only be seen on older engines, which were not looked after. The main sign that the gasket is broken is the unstable operation of the engine. You can see that the antifreeze leaves the tank. Also often there are cracks in the cylinder head and the engine block. The reason - freezing of the cooling liquid, more often - of a low-quality antifreeze. It is necessary to check the temperature sensor of the coolant constantly . Do not pour ordinary water into the expansion tank or the radiator. It will remain inside the system, even if the entire coolant is drained. Then the water will freeze. As a result, cracks in the channels are formed. In addition, the engine may deform in the winter due to icing of water.

Water in the crankcase

This problem can only be eliminated if the oil is completely replaced. It is also better to perform and flushing the motor with specialized fluids. The situation when water seeps into the cylinder is very rare. This can only happen on engines with faulty rings. Perhaps, the faulty valve of the engine is guilty.

Conclusion

So, we found out where the emulsion comes from. If the car owner does not want to know how much the overhaul of the engine costs (from 20 thousand rubles.), It is necessary to regularly service the engine. Do not ignore this symptom.