The ingress of engine fluid into the cooling system is a common problem for American-made cars, but it is also common in domestic cars. We will tell you how the oil turns out to be in antifreeze; the reason for such breakdowns is of interest to many motorists.

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Causes

As a rule, the driver finds out about such a problem as engine oil in the coolant expansion tank when he decides in the system. There may be oily residues on the neck, and the coolant itself itself may change its color or consistency. In addition, a relatively unpleasant odor may develop in the refrigerant.

One way or another, but it must be borne in mind that mixing a lubricant and a coolant is a very bad sign for the vehicle owner. Both consumables circulate through systems isolated from each other. Moreover, they are sealed, so mixing liquids should at least alert the driver. If consumables mix with each other, this means that the systems are no longer sealed, which can cause engine fluid to leak.

The most likely and common cause of mixing consumables, in particular motor fluid spills, can be:

• the occurrence of mechanical damage in the operation of the oil cooler or oil cooler;
• malfunctions in the cylinder head (the block gasket has worked out its service life);
• a heat exchanger (oil cooler) gasket that has exhausted its service life.

It should be noted here that it is at these points that the lubrication and cooling systems come into contact with each other. In an oil cooler, such contact is directly explained by the purpose of the device. In some vehicles, the engine fluid simply needs to be maintained at a certain temperature, as a result of which the cars are equipped with an oil cooler. The latter, in turn, interacts directly with the vehicle's cooling system, where the coolant acts as a coolant.

As soon as even the slightest depressurization occurs in the system or the pipes or hoses are damaged, the engine fluid will immediately begin to enter the cooling system or vice versa.

In addition, one of the important reasons is the mismatch of the refrigerants that the driver pours into the system of his car. For example, the driver recorded a too low level of coolant in the expansion tank and did not find another way out but to pour the first antifreeze that came into the system. As you know, antifreeze manufacturers can use various additives in their products. If these substances are incompatible with each other, then when heated with the engine, they enter into a chemical reaction with each other.

How to determine the mixing of engine fluid and coolant?

The following are the reasons why you can determine that your car has mixed oil with refrigerant:

How to solve the problem?

So, if the reason for mixing consumables is mechanical damage to the oil cooler gasket, then it must be replaced.

What is required?

To do this, you will need:

• about 12-15 liters of distilled water;
• new oil cooler gasket;
• new antifreeze;
• container for collecting old refrigerant.

Distilled water - it may take up to 15 liters to completely flush the system, keep this in mind

Step-by-step instruction

So, let's start replacing:

1. If possible, fill the refrigerant with a special cleaning fluid. Start the engine and let it run for a while (no more than 10 minutes). It is necessary for the engine to warm up to operating temperature, wait for the cooling fan to start. It is recommended to flush the system before replacing the oil cooler gaskets.
2. After flushing, locate the antifreeze drain plug under the bottom of the machine. Place an old bowl or any other container under it, unscrew the lid and drain the used refrigerant.
3. After that, you need to dismantle the oil cooler. For each individual vehicle, the instructions for parsing the oil cooler may differ, so we recommend that you use the service book for your car. Having disassembled the unit, you need to completely clean it. Dismantle the old gaskets that have exhausted their service life and install new ones in their place. Purchase gaskets according to your car model. If you are unsure which one is best to buy, consult your dealer.
4. After replacing the gasket, you can start removing the coolant expansion tank. Rinse it off as much as possible. You won't be able to completely wash it, so if you care too much about its appearance, you can replace the tank with a new one.
5. When the coolant is drained and the expansion tank is flushed, the system must be flushed several more times. Replace the tank and fill it with distilled water. Start the engine and turn off the blowing of the car interior. Also turn on all voltage consumers to maximum so that the motor warms up faster. When the temperature of the internal combustion engine rises to 100 degrees, the fan of the cooling system will turn on.
   Let the engine run for about 10 minutes more, while turning off all voltage consumers and turn on the airflow to the passenger compartment. The motor will begin to cool slightly and the cooling fan will turn off. Wait about 15 minutes for the motor to cool slightly, otherwise you may burn yourself when draining the distillate. Drain the distilled water and repeat the procedure at least one more time. It is necessary to flush the system until the drained distillate becomes almost transparent. Of course, it must be free of any traces of motor fluid.
6. After that, you can tighten the drain plug and fill in fresh antifreeze. Use only original products recommended by the car manufacturer. If you buy a fake, it can be fraught with other problems.
7. Start the engine and press the accelerator pedal hard several times. At this point, you will need the help of another person. When you press on the gas, the assistant must squeeze the pipes of the cooling system. In this case, the cover of the expansion tank must be closed. This is done in order to prevent the occurrence of air jams and eliminate those that have already appeared in the system. Open the cover of the expansion tank from time to time to bleed off the formed air.

The ingress of engine oil into freon occurs in cars of both foreign and Russian production. This poses a serious threat to the engine, so you need to fix the problem without delay as soon as you notice its symptoms. How to diagnose thatoil in antifreezeand we will tell you how to solve this problem further.

The main signs and causes of oil getting into antifreeze

Most often, the detection that oil has entered the refrigerant occurs by accident: when checking the level of antifreeze. When opening the expansion tank, the car owner not only changes the color and consistency of the coolant, but also the presence of oil residues on the neck or in the tank. If this is noticed, then we can immediately conclude that the engine oil has got into the coolant.

Engine oil and coolant are different liquids, not only in consistency, but also in nature as a whole, therefore, the circulation systems are completely sealed and do not depend on one another. The first and most common cause of oil getting into antifreeze is the depressurization of these systems, which occurs as a result of the following problems:

1. malfunction of the cooling radiator;
2. deformation of the cylinder head. As a result of the deformation of the heads, the seals and gaskets are displaced. When the refrigerant cools down, a stronger pressure is generated than when the oil cools down, which leads to the mixing of these liquids;
3. the end of the service life of the heat exchanger gasket. This is where the lubrication system comes into contact with the cooling system, as many vehicles require the engine oil to maintain a certain temperature;
4. malfunction of the pipes of the engine cooling system. Very often the problem arises due to the incorrect operation of the oil cooling system. This system is responsible for maintaining the required operating temperature of the engine oil, but it happens that the pipes are damaged, and it enters the cooling system. You can notice such a breakdown by the appearance of oil bubbles in the expansion tank, while the color of the liquid changes. To eliminate this problem, you need to replace the pipes, flush the cooling system, replace antifreeze and engine oil. After carrying out such actions, the malfunction usually disappears;
5. the appearance of a crack in the expansion tank;
6. poor quality of antifreeze or its mismatch with the brand of the car. To preserve the integrity of the protective film of the liner, special additives are added to the freon. When buying a refrigerant, make sure that the concentration of additives in it is sufficient.

It is possible to diagnose that oil has got into antifreeze by several signs.

1. Emulsion in the tank.When draining the antifreeze, you suddenly noticed that when most of it has already merged, a liquid of a different consistency and color begins to come out of the tank. If you rub this liquid between your fingers, then it will not leave a greasy residue.
2. Combustion of antifreeze.To diagnose that the oil is in antifreeze, there is another proven method: dip a piece of paper in antifreeze and set it on fire. If even a slight fire has occurred, then this indicates that oil is present in the liquid.
3. Soot in engine oil.The appearance of soot in the oil is also one of the signs indicating its mixing with antifreeze.
4. Clots in antifreeze.If you notice the appearance of clots in the antifreeze, which look like balls, then this indicates the presence of a leakage problem in the system.

Consequences of engine oil getting into freon

The most serious consequence of mixing oil and freon is the breakdown of the entire engine. More than half of the engines become faulty for this very reason. This is especially true for diesel engines. When mixed with antifreeze, a lubricating fluid loses some of its properties, which will certainly lead to engine wear in the future.

Oil in coolantgives a chemical reaction, during which clots are formed that clog the oil filter - this causes wear on cylinders, bearings and shafts, and also leads to the formation of corrosion in the engine.

Preventing oil from entering the cooling system

Never add antifreeze when you have another brand of refrigerant left in the tank. The composition of antifreeze from different manufacturers can vary significantly, so there is a risk of chemical reactions that will damage the entire cooling system as a whole or its parts.

At the first sign of mixing oil and antifreeze, contact a specialist who will identify the cause of the leak and help eliminate it.

When checking the level of antifreeze, the car owner may find engine oil in the most seemingly unexpected place - the expansion tank. Its neck will be smeared with a lubricant, and the coolant itself will change color, consistency and acquire an unpleasant odor.

This problem occurs most often in American and domestic cars. However, it cannot be ruled out that it will appear in the systems of other foreign cars.

What is the reason for such an unpleasant breakdown, how is it dangerous and how to eliminate it? Let's dwell on each issue separately.

Both coolants and lubricants circulate in the car in different systems independently of each other. They perform different functions, so they must be isolated inside the engine. If there is a problem of mixing engine oil with antifreeze, the driver should understand that this is possible only if the systems are depressurized.

It happens for the following reasons:

• irregularities in the operation of the oil cooler;
• mechanical damage to the cylinder head, heat exchanger gasket;
• destruction of the pipes through which the coolant passes;
• the occurrence of cracks and other defects on the expansion tank;
• falling into disrepair of the cooling system pump.

In addition to the reasons listed, the use of the wrong refrigerants, namely mixing them, can also cause damage. Each coolant has its own classification. Each of them has different properties and consists of specific ingredients. When incompatible additives interact with each other, an uncontrolled chemical reaction can begin, which will cause a depressurization of the system. Therefore, before pouring new antifreeze into the car, it is necessary to drain the old fluid.

Please note that the color of the coolant does not in any way characterize the class to which it belongs. This is just a dye added by the manufacturer. Therefore, do not try to mix two, say, red coolers, relying only on their visual similarity.

Is breakage dangerous?

Any malfunction in the car, even the most insignificant, should be given special attention, because it can provoke a more serious breakdown. Ignoring the fact of mixing lubricating and cooling liquids does not bode well: in a short period of time, corrosive processes are activated inside the engine, and the throughput of the oil filter will decrease.

It is the oil filter that will be the first to take on the "blow of misfortune", but if you notice the oil in the expansion tank in time, then you can get by with small victims. When changing the coolant and flushing the system, it is recommended to contact a car workshop.

Firstly, they can easily find the cause of the leak, and secondly, they will make a really high-quality cleaning of the cooling channels. If you decide to save money and carry out the procedure yourself, then keep in mind: incomplete washing out of oil from the expansion tank will continue to clog. And in an accelerated rhythm.

As practice shows, more than 30 percent of cases associated with a failure of the motor system cause a similar problem. Due to the interaction of the chemical elements that make up the lubricant and the coolant, a violent chemical reaction occurs that corrodes even metal parts. As a result, two systems fail at once.

How to determine if oil is getting into the expansion tank or not?

As mentioned earlier, the presence of oil in the expansion tank is indicated by a dirty neck of the container and a change in the structure, smell and color of the antifreeze. But these are not the main symptoms of a breakdown. It can also be determined by the following factors:

• when the coolant is drained, its condition is not in doubt, however, at the end of the procedure, a dark-colored slurry with a pungent odor begins to flow out of the system;
• soot may begin to settle inside the expansion tank;
• the antifreeze level drops rapidly.

There is another peculiar way to find out if oil has appeared in the cooler. To do this, take a small piece of clean cloth, dip it in antifreeze solution in the expansion tank, and try to set it on fire. Does not burn? This means that only refrigerant is present in the system. If even a small flame appears, you can be sure that oil has got into the cooling system.

Debugg

Why such a problem appears, and what consequences it leads to, we figured out. Now it remains to understand how to eliminate the breakdown and prevent its reoccurrence.

Engine oil disposal is a complex, careful process that most often requires replacing the oil cooler gasket.

To carry out this manipulation, you will need:

• distilled water (10 liters);
• replacement antifreeze;
• container for draining spoiled coolant;
• oil cooler gasket. Do not try to clean the old one and return it to its original place: after interacting with unwanted chemicals, it has lost its properties;
• special detergent.

Because oil appears in the cooling system of many vehicles; you can find special means to eliminate it in any car dealership. Most importantly, do not try to purchase the cheapest drug - it will not be able to completely remove the oily liquid from the inner surfaces of the system.

The procedure for replacing the oil cooler gasket is quite simple: first, you must dilute the existing coolant with a detergent composition and let the engine run with such a liquid for 10 minutes. Then you need to unscrew the drain plug of the cooling system and wait until it is completely empty.

After that, we install the oil cooler, clean it, replace the gasket. Next, remove the expansion tank and thoroughly rinse it out of oil residues.

As soon as all the manipulations are completed, all elements of the system should be collected and started several flushes with distilled water.

If during these activities you notice cracks, chips in the parts and understand why oil gets into the refrigerant, you should immediately replace the weak element to prevent re-mixing of liquids.

To avoid such a problem, the driver should regularly carry out vehicle maintenance and carefully check the status of vital systems. If you doubt your own capabilities, then it is advisable to entrust the work to professionals. But in no case can you ignore the problems that have arisen.

And finally

It is impossible to completely protect your car from breakdowns, because they appear at the most unexpected moment, and sometimes you can only guess about their reasons. Nevertheless, the car enthusiast can reduce the risk of unpleasant situations if he is more careful with the car. In cases where oil enters the cooling system, it is clear that the depressurization is to blame. And in order to avoid repetition, first of all, this depressurization should be eliminated.

The penetration of engine oil into the coolant in a car is a fairly common phenomenon. If you find such a problem, you need to contact a specialist to fix it.

The devices, through which the two components pass - oil and coolant, are completely sealed and independent of each other, therefore the presence of oil particles in the cooling system is not the norm. In this case, special attention must be paid if there is oil in the cooling system of a diesel engine, find out the reasons.

First signs of engine oil and coolant leakage

Vehicle owners, periodically servicing their car, may encounter some problems, indicating the fact that liquid is leaking in the car. These include:

• the presence of dense smoke;
• if the color of the engine fluid or cooling element has changed;
• when checking the cylinder liners, their curvature was found;
• the volume of the coolant has decreased;
• clots are observed on the oil filter;
• there was a rather unpleasant smell in the coolant.

If such signs are found, then you need to find the reason for the engine oil getting into the cooling elements.

Why does oil get into the engine coolant?

After detecting the first signs of a leak, it is necessary to determine the problem that led the corresponding devices of the car to such a state. The presence of oil in the cooling system of a car engine is influenced by the following reasons:

• there is mechanical damage in the radiator or oil cooler;
• The cylinder block or oil cooler gasket is worn out and loses its elasticity or is cracked.

The cooling system and the oil cooler are completely sealed, but their constituent elements (hoses, pipes) are in contact with each other. In places of friction of hoses and gaskets of systems, cracks may occur, as a result of which the engine fluid immediately enters the cooling system of the vehicle or vice versa.

A separate reason for the ingress of oil into the antifreeze should be noted the use of a coolant that is not suitable for a particular vehicle. It is not necessary to add any antifreeze to the required level. Different refrigerant manufacturers use a variety of additives to maintain a protective oxide layer on the cylinder liner.

Using refrigerants with different additives can damage the cooling elements. An insufficient amount of additives in the used refrigerant will lead to acceleration of chemical reactions and deformation of the system, and an excessive amount will increase the likelihood of premature corrosion of the system surface.

Reasons for engine oil entering the diesel engine cooling system

Particular attention should be paid to a diesel car engine. The diesel engine becomes more contaminated when out of service. During the cooling process of a diesel engine, thermal changes in the cylinder head occur, leading to a change in the location of the gaskets and seals. All these are the reasons for the oil getting into the diesel engine cooling radiator and vice versa.

Experienced drivers can correctly determine the cause of the leak. But they sometimes need the help of a specialized service company. In such services, a special luminous liquid is added to the cooling system to locate leaks in the cooling system, which allows you to accurately determine the place of the leak.

But it is not always possible to find cracks or a place of depressurization of the system in this way. In this case, specialists have to disassemble the entire structure and determine the malfunction by elements.

How do you know if engine oil and coolant have mixed?

It is necessary to contact a service company to diagnose a car for an oil leak in antifreeze, if the motorist understands by certain signs that this has happened. So, if in the process of getting rid of the coolant in the car, a rather thick dark liquid is found, the particles of which are on the surface of the coolant, then most likely the oil got into the antifreeze.

If you dip a regular napkin in the particles floating on the surface of the antifreeze and set it on fire, the napkin will burn. The presence of soot particles in the engine oil also indicates a leak. Another problem is possible here, when soot particles get clogged into the filter. This can lead to a complete lack of oil passage through the filter and, consequently, to cylinder failure.

The coolant is based on an alcohol solution, therefore, when oil enters it, a certain chemical reaction takes place with additives of oil and antifreeze. This is subsequently reflected in the purity of important elements of both diesel and gasoline engines.

The most dangerous in diesel engines is the curvature of the walls of the cylinder liner, leading to the ingress of part of the antifreeze into the combustion chamber. As a result, the coolant will not have the required density and the engine will stop.

Replacing the gasket when repairing a leak

To eliminate the leakage of engine oil into the coolant of the car due to a worn out gasket, you need to install a new one. For the replacement procedure, you will need distilled water, a new gasket, and a new coolant.

First, you should rinse the structure with a special cleaning liquid. To do this, you need to pour a cleaning liquid into the cooling structure of the car, turn on the engine for as long as it takes to start the fan. Then it is necessary to empty the system, draining the used antifreeze from it. Antifreeze is drained through a hole behind the engine or radiator plugs.

The oil cooler is being disassembled into its constituent elements. In this case, the motorist should be guided by the server description for the vehicle, since the disassembly procedure depends on the specific vehicle. After disassembly, the entire system must be thoroughly cleaned and the worn out gaskets must be replaced with new ones. Gaskets should be purchased for a specific vehicle.

After replacing the gasket, the car owner should clean the coolant tank. Alternatively, you can purchase a new tank and replace the old one. After flushing or purchasing, the tank is secured in place. Pour the required amount of distilled water into the tank and turn on the engine.

Keep the engine running until the cooling fan comes on. Stop the engine after running for 10 minutes. Here you can see that as the motor cools down, the fan also turns off. After these manipulations, the motorist needs to drain the distilled water.

Flushing is carried out several times. Pay attention to distilled water that has been poured out. It must not contain particles of engine oil. After flushing the coolant system, you can fill in a new high-quality antifreeze recommended by specialists.

The final stage of the repair of the cooling system

At the end of the procedure, you must turn on the engine and press the gas pedal. At the same time, it is necessary to squeeze the pipes of the car's cooling system with the expansion tank cap closed. This procedure will prevent the formation of air in the cooling system. Therefore, one person cannot cope with the process; an assistant is required.

When using the car in the future, you should periodically open the expansion tank to release air jams.

The basic rule for a motorist is to keep the engine clean. In order to contact service companies less often, you need to undergo timely maintenance, check the quantity and quality of oil in the system, and regularly replace engine oil and coolant.

One of the problems for car owners can be the ingress of engine oil into the cooling system of the car, and vice versa. Normally, both engine oil and coolant circulate in closed circles and cannot mix with each other. The detected antifreeze in oil and oil in antifreeze are the result of similar malfunctions.

Fault diagnosis

These can be cracks in the contours or a punched gasket. The location of the leak will determine the complexity of further repairs and the financial costs incurred in this regard. This problem, oddly enough, most often arises in new cars produced by the American automobile industry, and sometimes car owners encounter it after visiting service stations. Such a malfunction, if detected early, can lead to losses of antifreeze and oil.

They will have to be completely drained, and then filled with new ones. And this is the best outcome for a car enthusiast. If you continue to operate the car without eliminating the problem, you can erase the camshaft bushings, provoke a breakdown of the crankshaft and smoothly come to the subsequent overhaul of the car engine. Given the severity of the consequences of such a malfunction, it is important to identify in time the reasons why oil and antifreeze are mixed.

Antifreeze in the oil or the ingress of the lubricant itself into the antifreeze is most often detected by accident, for example, when opening the radiator cap or the expansion tank of the oil cooler. In the antifreeze, at the same time, oil stains and lubricant particles are clearly visible, and the characteristic signs of liquid entering the lubricant are the color change of the latter to light gray and the appearance of recognizable antifreeze balls floating in the oil solution.

Antifreeze in oil can be found in another way. As you know, water and oil have different densities, and therefore, having noticed a change in the level of lubricant in the car, simply unscrew the plug from the sump and check which one will pour first. If there is water, then the coolant enters the engine oil circuit. A similar procedure should be carried out after the car has stood for 10 hours.

Sometimes it is difficult to detect a malfunction when there is a problem with mixing oil and antifreeze. To reduce temporary losses and labor costs, a special luminous additive is added to the engine oil. Thanks to this admixture, it becomes easier to find the place of leakage or cracks. You can make it easier for yourself or the technicians to diagnose if you keep your car and its engine clean and tidy. In a clean engine, you will be able to spot fluid leaks faster.

Oil cooler breakage

The oil cooling system is necessary for the car to keep the lubricant at a comfortable temperature for the car. If the pipes of the oil cooler are damaged and this system is depressurized, oil gradually begins to enter the coolant. The first signal that the problem of your breakdown is in the oil cooler is the appearance of oil with bubbles in the coolant.

In this case, it is necessary to remove the pipes from the oil cooler, rinse them and connect them together. The expansion tank of the system must also be completely cleaned. After these manipulations, the liquid is poured again. After a short period of time after restarting the car, you need to check whether the problem has disappeared or not. If so, the repair will cost you a little less, since you will have to deal exclusively with the cooler.

After removing the cooling system, all pipes should be thoroughly checked and welded if cracked. This part of the work should be entrusted to professionals. Poor-quality repairs, in the end, will cost you even more. Most often, copper pipes of the appropriate diameter are simply inserted into the places where cracks in the oil cooler are formed.

Sometimes the oil gets into the antifreeze through the fault of the service station employees. If you find such a nuisance after visiting the station, it is worth checking if engine oil has been added to the cooling system of your car. For this, the liquid from the oil cooler is completely drained, and the system itself is thoroughly flushed. In the final part of the work, you just need to pour new antifreeze into the engine.

Be sure to take into account that the heat exchanger filter is oil on passenger cars. In the event of a diagnosed malfunction of the engine circuit in question, it is imperative to replace the filter.

Breakage of the head of the engine block

This cause of a car malfunction will already be an order of magnitude more serious than a breakdown of an oil cooler. The head and block are very important places in the engine compartment, because this is where the cylinders, combustion chambers and more are located. From the inside, the head is washed with oil, and from the outside along the contours, it is cooled by antifreeze. In this case, the oil pressure is higher than the pressure in the cooling system, and therefore the lubricant through cracks can get into the antifreeze.

The metal body, by means of which the contours of the systems are separated from one another, has holes. They have gaskets that normally prevent mixing of antifreeze and oil, and it is they who can give such a leak. There are several reasons for this. The first of the possible options is corrosion of the gasket itself when mixing coolants. Out of ignorance or inexperience, motorists can sometimes add antifreeze of another brand or another manufacturer to the cooling system, instead of completely replacing it.

This savings is ultimately very costly, since fluids can contain various additives, and when they react with each other, they form a mixture that is harmful to the engine. It is the chemical solution that eats up the block head gaskets, forming cracks, and sometimes leads to the formation of the latter in the metal parts of the circuits themselves. The second reason for leaking gaskets is more commonplace. They can just wear out.

During the operation of the car, the engine casings and heads experience certain mechanical influences from other elements of the power unit, as well as temperature loads. The result of this is the appearance of cracks on the gaskets. If the reason for the mixing of oil and antifreeze was identified precisely in the leaky gasket, a complete replacement of the consumable will help to eliminate such a malfunction.

It is much worse when everything is in order with the gaskets and the cooling system, and cracks on the engine block head itself become the reason for the penetration of fluids into other circuits. Removing the head and checking its tightness by crimping helps to identify this. Any cracks found can be repaired by subsequent grinding or welding. To brew them in the head with high quality, you need an experienced master.

Damage to the motor gasket is the main reason for the ingress of grease into the antifreeze

Not all workers of the service station can cope with such a task, and therefore a complete replacement of the engine block head is often required. This type of repair is the most time-consuming and financially expensive. Please note: the appearance of cracks in the head of the block can provoke a piston hitting it.

It is also not uncommon for careless motorists to simply ignore elementary physical phenomena during the operation of their "iron horse" and provoke cracks in the head themselves. An example is a liquid frozen to ice in winter. In addition, sudden temperature changes in summer, which occur when the coolant overheats while driving, are detrimental.

The liquid poured into the system, expanding under the influence of high temperature, begins to flow out and evaporate. At this time, the driver himself, in order to eliminate the indicated phenomenon, begins to add new liquid, but already cold. The result of such improper handling of the car engine is microcracks, which, imperceptibly to the eye, can be pressed into the engine. This is how antifreeze in oil or grease in a liquid turns out to be.

Be sure to keep in mind that for any type of breakdown, you will need to completely replace both the engine oil and the coolant. The systems themselves, after eliminating the causes of the breakdown, will need to be thoroughly rinsed, removing the remnants of the previous mixtures. When both liquids get into each other in terms of their qualitative composition, they deteriorate and lead to malfunctions in the car. Accordingly, it is impossible to leave them, even after eliminating the cause of the breakdown.