Proper engine care is one of the most important tasks in car maintenance. Every owner who is attentive to his car knows that the performance of the car as a whole depends on the quality of service and functionality of the motor. Many car owners at the approach of the deadline scheduled maintenance machines drive it away to a service center, where specialists perform all the necessary procedures in accordance with the regulations, however, there are those who prefer to carry out simple service work on their own. In this article, we will talk about the procedure for changing the oil, regarding the need for which there is some controversy regarding the frequency of such a process and the type of flushing fluid. Consider whether flushing the engine with diesel fuel justifies itself before, which was used in ancient times and has remained relevant today, we will talk about the advantages and disadvantages of this method of dealing with deposits in the power unit, and also tell you how to properly perform such a procedure.
How to properly flush the engine before replacing diesel fuel.
Why do you need to flush the engine with diesel fuel?
The fact that it is necessary to replace engine oil in accordance with the regulations is known to all car owners, due to the loss of the lubricant's protective properties during operation and a decrease in its efficiency. About the regulations and the need to change lubricant many articles have been written in the motor, however, it is rarely mentioned that before filling in a new lubricant, it is necessary to wash the unit from the inside. How do professionals explain such a need, and how often should the procedure be performed?
Need for flushing power unit occurs in the following situations:
- Change . Today, the market for fuels and lubricants is very diverse, which provokes the consumer to select more efficient oils for their car, which differ not only in appearance, but also in composition. When draining the oil, even if the procedure is performed very well, a small amount of waste fluid remains in the units of the unit and on its walls, and when the system is filled with new lubricant, a “conflict” between the components of the motor oils may occur, which will be reflected in the operation of the motor in a negative direction.
- Change of car oil after purchasing a car for secondary market. A similar situation, in which the owner knows what kind of liquid is in the engine, only from the words of the seller. Before filling the oil, the engine must be cleaned of the previous lubricant.
- Ingress of coolant into the system as a result of deformation of the gasket.
- Engine overhaul. In this case, all structural units underwent contact cleaning and were subjected to manual assembly, which is often accompanied by the ingress of small particles into the system, which can adversely affect the operational period of the unit.
These precedents necessitate a mandatory . In addition, flushing the engine may be necessary if the car is operated in extreme or difficult conditions, high-speed and high-temperature conditions, which provokes the formation of scale on the internal surfaces of the unit, which blocks the oil passages. You can determine the need for flushing the engine by examining the drained liquid: if there are large particles, flakes and sludge in the mining, you will need to clean the engine from the inside in order to remove components dangerous to the motor.
AT present time service center employees recommend flushing with special fluids that are designed to clean the power unit before changing the oil. Why, then, did the question arise about washing with diesel fuel? A few decades ago, the number of cars on the roads of the country was much less, and private car far from every family could boast, and, accordingly, the range of liquids for servicing the motor was limited to several types of oils and diesel fuel, as a means for flushing it. Today the situation on the market has changed, but the habit has remained. Many car owners still wash their engines with diesel fuel themselves and recommend this procedure to others. Moreover, some explain this fact by saving, while others testify to the high efficiency of diesel fuel as a flushing fluid.
Today, the theory of the high utility and quality of engine flushing with diesel fuel has both adherents and opponents, and in almost equal numbers, which makes car owners figure out the pros and cons of such a procedure for themselves, and as a result make an independent decision in favor of a flushing emulsion - choose a modern liquid or give preference to solar.
Pros and cons of diesel fuel as a flushing fluid
Indeed, one of the advantages of diesel fuel in comparison with by special means is price policy. Flushing the engine with diesel fuel before changing the oil will be much cheaper than doing this procedure using. The second argument in favor of diesel fuel is its use in all CIS countries for cleaning engines of domestically produced equipment, as well as its applicability for motors of special equipment. The effectiveness of this method is proved by a large number of domestically produced cars on the roads at the present time, which perform their functions perfectly, despite their advanced age.
But the following fact makes one doubt the benefits of diesel fuel for the motor. The effectiveness of diesel fuel when flushing the engine before changing the oil is explained by many users by the fact of its active use for cleaning engine elements during its overhaul by professionals. And this is true, diesel fuel actively cleans the elements from scale, dirt and sludge. However, opponents of the theory argue that when cleaning parts in the process overhaul these nodes are affected not only by diesel fuel, but also a significant mechanical impact resulting in a positive result.
In addition, many experts note that when flushing an engine, diesel fuel does not break down scale on parts, but acts by peeling it off internal surfaces. Since it is almost impossible to completely remove these particles during the washing process, some of the coarse components will remain in the engine, and when oil is added, the particles will circulate freely through the system, causing damage to it and blocking small passages, thereby provoking oil starvation of individual motor components. Additionally, doubts about the effectiveness of diesel fuel in cleaning the power unit are caused by the effect of liquid on oil seals, gaskets and seals. Diesel fuel can provoke their deformation, which will be displayed not only on the functionality of the motor, but also on its performance characteristics, can cause it premature exit out of service.
An impressive list of both the positive characteristics of diesel fuel as a flushing fluid, and negative factors, makes one wonder if it is possible to flush the engine with diesel fuel when changing the oil. There is no single answer to this question. In practice, over the years of its use, diesel fuel has earned popularity in relation to motors of domestic-made cars with significant mileage. Some owners of used foreign cars also actively use this method of cleaning the power unit and confirm its effectiveness. As for new or warranty cars, foreign cars with low mileage, engines of modern modifications, then here the opinion of professionals is unequivocal - such a procedure is strictly prohibited, since this can not only fail, but also harm the engine. In addition, even in relation to old cars, the procedure should be performed only when the need arises, but not with every oil change.
The process of washing the engine with diesel fuel
If, after weighing all the pros and cons, you decide to clean the engine with diesel fuel, trust more the experience of the ancestors, which has proven its effectiveness over the years, than modern liquids, we will tell you how to perform this procedure correctly and correctly. The methodology for flushing the engine with diesel fuel when changing the oil is not particularly difficult and significant investment. To accomplish this task, you will need to stock up on diesel fuel, in a volume of at least eight liters, two oil filters, one of which must be of high quality, preferably original element for your machine, the other one may be the cheapest, as it will only be used when cleaning the power package.
The procedure is performed immediately after draining the used oil. It is recommended to drain mining in a pit or overpass, on a warm engine through an oil drain hole on the oil pan. Sometimes for this you will need to remove the protection of the power unit, if it is provided for by the modification vehicle. FROM detailed instruction on changing the fluid in the power unit for a specific car model can be found in the user manual or in articles on this topic on our website. After draining the used oil, you need to dismantle the worn-out oil filter, install the purchased filter element in its place.
The next task of the performer is to flush the engine from dirt and sludge to the maximum. To do this, the engine is first cleaned of coarse particles and oil residues by running diesel fuel through the system. The oil drain hole is left open, diesel fuel is poured into the filler opening with maximum pressure. Beforehand, it is important to place a container for the waste liquid under the drain hole. To perform this procedure, you will need about three liters of liquid.
The next step is a better flushing of the units of the unit and its hard-to-reach areas. To this end, the drain opening is closed and diesel fuel is poured in a volume equal to the amount of oil in the car's engine. Next, you need to start the car and drive the flushing emulsion through the system by maintaining the speed, however, without bringing the power unit to operating temperatures. This moment is very important, since in the mode of increased speed, the diesel fuel will not be able to cope with the tasks, causing harm to the contacting parts.
After this procedure, the flushing liquid is drained, while the quality of the flowing emulsion is visually controlled. If diesel fuel flows out too contaminated, with sludge particles, it is important to carry out this procedure again. Flushing should be carried out until clean fuel begins to flow from the drain hole, without the presence of impurities in it. At this stage, the engine flush can be considered complete. Next, you should replace the temporary oil filter with a new, original product, tighten the drain cover tightly, having previously cleaned it of dirt and accumulations, if necessary, change the seal between the opening and the plug, if it is provided for by the design. The final stage is the filling of a new car oil into the vehicle's engine. After replacing the lubricating emulsion, it is important to run the engine in - drive the car for about five kilometers in a quiet mode, check the oil level again, top it up to the level if necessary, and inspect the butt joints for grease leakage.
Since diesel fuel does not have sufficient detergent and lubricating properties that are required for the normal functioning of the engine, the first few kilometers, until the oil is distributed evenly over the nodes, it is important not to operate the vehicle in an aggressive mode. Some car owners, in order to eliminate the risk of abrasion of the contacting elements, recommend flushing the engine not with clean diesel fuel, but diluted in an equivalent proportion with inexpensive engine oil, however, the feasibility of such a procedure has not been proven.
Summing up
Diesel fuel has been used by car owners for many decades as an effective and gentle means for flushing a power unit. Today, the effectiveness of the diesel fuel flushing procedure is being questioned by many automakers and service center employees, and options for using specific liquids for cleaning the engine are considered alternative. However, a detailed study of the composition of special emulsions for washing the motor raises doubts and controversial issues, since the effective removal of soot and dirt through special liquids is achieved due to the presence of aggressive chemical class components in them, which can also negatively affect the units of the unit.
As long-term practice proves, the method of washing the engine with diesel fuel has the right to exist, is characterized by high efficiency against the background of low costs, and is considered a gentle way to clean the motor. Each car owner has the right to decide which means to give preference to independently, while you should act very carefully when washing, follow the instructions, do not overheat the motor - and the result will meet expectations. And even better - monitor the engine of your car, try to avoid overheating and stress, change the car oil in a timely manner - and the engine will not need such procedures.
Presale Recipe from a Classic
Then they poured oil into the engine, the thickest one they could find. The cylinders were not the best and knocked a little. This was compensated by the density of the lubricant, the motor ran surprisingly quietly.
Erich Maria Remarque
The fierce debate between supporters and opponents of washing the engine when changing the oil has recently escalated due to the fact that new cars are now sold in the country much less than used ones. That is, citizens sell cars to each other, and the renewal of the fleet, which everyone hoped for, has slowed down significantly. Meanwhile, a used car, as you know, is a pig in a poke. What is the age and quality of the substance that splashed in the engine at the time of the sale - only God knows.
This immediately follows theses about the need for flushing.
When is flushing not required?
- You are the first and only owner of your car;
- You are always on time (or better - more often);
- You are confident in the service in which the work was carried out (the servicemen did not cheat by not changing the oil at all or replacing it with their own, cheaper one);
- On a long journey, you never had to top up anything.
When is the best time to wash?
You should think about flushing when buying a car from your hands, and even with an opaque service history. There are instances of engines in which deposits from the top of the engine can literally be raked out with a shovel. To do this, it is advisable to look into the oil filler neck with a flashlight, and to the side: cunning sellers may well wipe the visible parts of the cylinder head parts with a cloth.
Another case is, for example, when switching from mineral water to synthetics.
Flushing Options
There are several ways to flush an engine.
Five minute wash. It is poured into the engine before changing the oil, thus mixing with the already used oil. Then let the engine run for Idling five (or ten) minutes, drain the waste, fill in fresh oil and put a new filter.
Washes with which you can travel some distance. 100 km of run before the proposed oil change, they fill in, and during this run they try not to be too reckless. Further - standard replacement oils and filters.
Washing oil. With this method, the used oil is drained and a special flushing oil is poured instead. Allow the engine to idle and drain the flush. Install a new filter and add new oil.
Extra portion of oil. A method especially recommended when changing the type of oil base, for example, when switching from mineral to synthetic. It can also be recommended for fairly dirty engines, in one of the three ways above. After draining the old product, fill in the oil on which further operation of the engine is expected.
The amount of oil in this case can be minimal (two liters), only to go out. In this case, it is also recommended to drive the engine at idle. Then this volume is replaced with new oil with the installation of a new filter. For especially caring owners, there is a modification of this method: with new ones, travel for a short time, and then carry out another replacement. At the same time, at the intermediate stage, the oil will need to be filled in no less than the lower mark.
Watch the oil pressure while the engine is running on all the above cocktails, except perhaps for the case of pouring an extra portion of oil. Be especially careful when flushing diesel and supercharged engines - they usually have slightly higher specific loads and oil starvation is completely unacceptable.
Cheap - angry
On the Internet, numerous forums suggest flushing engines with diesel fuel, both clean and diluted in half with engine oil. I am of the opinion that fuel is fuel, and it is better to flush the engine using one of the above methods. A solar bath can be very unhelpful for oil seals and other rubber engine seals. This liquid is very aggressive.
- Try not to lose sight of your car during this procedure. So you will be sure that you have filled in new oil and installed a new oil filter.
- If it was not possible to follow the previous advice, then when accepting the car, look at the oil level on the dipstick. The oil should reach the upper mark and be sufficiently light. Although in gasoline engines even after a short operation, it may darken somewhat, and even blacken in diesel engines. And yet it will be much lighter than before the replacement.
- Try to determine if the filter has been replaced. On some cars it is visible from above, on others it is only accessible with the removal of the mudguard or engine protection. In this case, check if these elements show signs of dismantling.
From personal experience
I got it from a good friend. Mileage - about 100 thousand km. I knew the history of the car very well, as I often helped with repairs. There were suspension malfunctions (bearings and shock absorbers), the rear brake cylinders were “candied”, the driver's seat was sitting out. But now, having become the owner, I decided to look into the engine, adjust the valves. The gaps had to be touched only on a few valves, and then a little bit. And most importantly: I was shocked by the complete absence of deposits under the valve cover. Details were only slightly covered with a light golden coating. And I also teased the previous owner that he changes the oil more often than he fills the gas tank! ..
conclusions
It is best to change the oil at least every 7.5 thousand km, that is, twice as often as recommended by most automakers. In this case, regardless of the operating conditions (city or village), you are guaranteed to avoid accelerated wear of engine parts. Only those who have a “new” car should immediately follow this rule, and second-hand owners should first carry out flushing operations, as indicated above, and then follow the same recommendations.
More information about engine oil and additives is in the selection of publications "Behind the wheel" "Engine oil: what and why to pour?".
Dear readers! Tell us about your attitude to flushing the engine in the comments. Is it necessary, in your opinion? Do you conduct?
Effective engine flush. Engine cleaning methods that really work
How to keep your engine lubrication system clean for years to come. After all, this factor is one of the most important for the health of the engine during the operation of the car. What is it for, let's see. Sludge, slag, carbon - all this is the result of the combustion process in the engine. When we buy a car, due to lack of time, money, etc., we simply forget about proper car maintenance. And this drags on for a long time, during which the sediment in the form of combustion products settles on engine parts. Due to which their friction increases - metal on metal, respectively, destruction occurs.
The oil filter does not always cope with its task, and microparticles that do not fall under the filter begin to circulate in the engine, causing microscopic scratches, damage to the walls of the cylinders and bearings. Valves begin to stick, hydraulic lifters knock, pistons are disrupted, causing engine oscillations. Then the owner of the car wonders why the engine is eating oil in liters per 1000 km. where is this high flow fuel. Here is the result of the car owner's inaction, see the picture below. This motor has not passed even 30,000 km. See what condition it's in.
Why flush the engine
What to do, you ask? And nothing to do, it is necessary to wash, that's all.
Many are skeptical about flushing the engine, for good reason. A lot of junk appeared on the market supposedly flushing, which in their composition have an ultra-high solvent and are in no way suitable for the engine. Don't pay attention to cheap washes.
DO NOT take the first one that comes across from the store shelf.
A good flush is a product that restores compression in the engine cylinders, effectively works to remove sludge, dirt, while not only allowing it to fall off, but also dissolves it so that it does not clog the channels and is easily removed from the mixture system.
Also, a good flush should cover all microscopic defects in the motor, and restore both oil seals, and all rubber seals.
Pluses and minuses of washings for the engine.
Bad flush:
- Corrosion of the oil seal, as a result of engine leakage
- Loss of compression
- Increased oil consumption
- loss of power
- clogged channels in the engine
Benefits of a good flush:
- Restored engine compression (You can do a test before and after application)
- reduced fuel and oil consumption
- Sludge cleaning
- The car becomes more responsive, lighter
- Engine noise is reduced
- Has TUV RUF ROHS approval
Ways to clean a car engine
Let's look at several ways to effectively clean the engine of carbon deposits and sludge.
1. In parts stores, you can find such a product as, for example, motor oil with a viscosity of SAE 40. This is a seasonal summer product that has a fairly high detergency and effectively cleans the engine.
Drain the used engine oil and refill this oil without changing the oil filter. Start the engine and run at idle for about 15-30 minutes, you can ride a little.
Then drain the oil, most likely it will be black, as it will collect all the dirt that has collected on the walls, parts, etc. Repeat everything done earlier until the color of the oil is the same as you filled it.
This is one of better ways flush the engine, and after clean oil is drained, you will be sure that the engine is clean.
Result. After this method of washing in the engine of the problematic Ford Explorer 1992, oil and fuel consumption decreased, the engine began to run quieter, the car became smoother and more responsive.
2.
The second way is to wash the engine well.
Flushing from Liquid Moli Engine flush - in the common people, has long deserved recognition. It is poured into the engine into the used oil, the engine warms up for about 10 minutes and then drains. Great product, easy to use and most importantly effective.
Always take it as a consumable when changing engine oil. Long-term flushing is also suitable here, if everything is completely bad.
Fill it up for 300 km. before the shift, the cleaning will already begin.
Lambda Oil Primer.
Here's another interesting and super effective car engine flush - Lambda Oil Primer.
This product is approved by TUV, ROHS and VAG. Works well in restoring engine compression. Many who used it simply craved to do a compression test before and after application. The results were excellent after washing. Perfect cleanliness and operation of the motor, as well as its subsequent protection.
It is applied in petrol and diesel engines. One of best premium washes, which is in the world.
As for the characteristics of the product:
Effectively cleans the oil lubrication system, preventing problems associated with the accumulation of sludge, dirt, deposits. After cleaning, clean oil in a clean engine is guaranteed for many kilometers.
It is applied both in the engine, and gearboxes and differentials. It contains a lubricant that protects mechanical parts during the cleaning process.
Suitable for all types of modern and old benz. and diz. engines. added to any motor oil.
To get the maximum effect from changing the oil, after draining the used lubricant, the motor must be cleaned of residues and sediment. And in this case, the question arises of how best to flush the engine before changing the oil.
But is it worth it to flush the engine when, after this procedure, the remnants of the cleaning agent, like previously used oil, can remain inside? According to statistics, after flushing the internal combustion engine, from 5 to 20 percent of the liquid remains inside.
So, depending on the quality of the work performed, in a 1.8-liter power plant, for example, up to 400 ml of flushing fluid can remain. Therefore, questions about which engine flush is better and how it is worth flushing the engine after decoking, so as not to harm the car, are very relevant.
How to wash the engine from oil
When choosing an engine oil cleaner, it is necessary to proceed from the fact that this substance should have a minimal negative effect on fresh engine oil.
The active components and additives of the latter are able to react with various flushing ingredients, causing a decrease in viscosity and foaming of the lubricant.
All this affects the performance of the oil, which can significantly “sag”, which, in the end, will negatively affect the performance and life of the power unit.
Disputes over the advisability of cleaning the engine escalated against the background of an increase in sales of used cars, as well as a general slowdown in the renewal of the car fleet in the Russian Federation.
Often, purchasing a used vehicle is a pig in a poke, and cleaning the internal combustion engine seems reasonable, because it is almost impossible to determine the condition of the engine oil.
When to clean
If you bought a car with a dubious maintenance history, then it's time to think about flushing the power unit. There are frequent cases when, after acquiring a coveted vehicle, new owners find unpleasant surprises in the form of impressive deposits in the upper part of the internal combustion engine.
Therefore, when looking after a car in the secondary market, do not be too lazy to check the oil filler neck. And it’s better to use a flashlight for this in order to examine those parts that the cunning seller could not quickly clean up.
The question of which tool to choose and how to use engine flush is also relevant in the case of changing old oil to a lubricant with a different type of base. We are talking, first of all, about the transition from mineral oils to synthetic counterparts.
ICE cleaning options
Today, car power units are cleaned of old grease in various ways.
Five Minute Flush
This tool is poured into the engine immediately before changing the engine oil, mixing with "working out". After that, the internal combustion engine is started, idling for 5-10 minutes. This is followed by the traditional draining of the spent composition, changing the filter and injecting new lubricant.
flushing oil
Here, a specialized motor lubricant, which is poured in after the spent composition is removed. The motor works for some time with this oil at idle, after which the substance is changed to fresh car oil, and the filter is cleaned.
Flushing with which they drive
This option allows you to drive a certain distance with a cleanser. A special substance is added to the old lubricant about a hundred kilometers before the next oil change, and up to this point I have been operating the car correctly and accurately. When the time comes for maintenance, the engine oil is changed according to the standard procedure.
Extra amount of lubricant
This option is recommended when changing the lubricant to a composition with a different base, or for washing very dirty motors. First you need to drain the used lubricant, and pour in the composition that will be used in the subsequent operation of the car.
The amount of fresh oil can reach only a couple of liters. The engine does not idle for long. After that, all the lubricant is changed to fresh again, and a new filter is installed.
This is the answer to the question of which engine flush cleans better.
The best flush for the engine cooling system
For cooling ICE systems well suited for rinsing with water. This method allows you to solve the problem quickly and at minimal cost.
The use of acids is more effective. This option involves the use of citric or phosphoric acid, which are diluted in distilled water in a proportion of 100 g per 1 liter.
The liquid poured into the cooling system remains there for at least three quarters of an hour. This procedure should be preceded by flushing with plain water, which is repeated after draining the acid from the system. The final rinse with water involves 4-5 complete cycles to completely neutralize the acidic environment.
Often, motorists resort to washing with a bite. In this case, an aqueous solution is formed in a ratio of 1 to 10. In order for the cleaning agent to function well, after pouring the solution into its system, it is heated to about 100 degrees Celsius.
After that, it is left in the system for about 10 hours. If, when draining the solution, there is no dirt and / or scale in it, then there was not enough time, and the procedure should be repeated.
Washing with soda also finds its use, but only for cleaning engine parts made of copper and / or brass. For these purposes, 50 grams of soda is diluted in a liter of plain water. This composition is cheap, but does the job perfectly.
In each case of washing the motor, which are described above, it is necessary to control the oil pressure. First of all, this applies to supercharged “engines” and diesel engines, for which lack of lubrication is critical and unacceptable.
Car enthusiast companies say that flushing the internal combustion engine with diesel fuel is very effective and economical. For these purposes, people use both pure diesel fuel and a mixture with engine oil in a ratio of 1 to 1.
Experts, answering the question, what is the best way to flush a diesel engine, offer one of the methods described above. In addition, it should be understood that the solarium is capable of destroying various rubber seals and structural elements.
Changing dirty oil to clean oil every 10-15 thousand kilometers, not all car owners flush their engine. Many of them are tormented by the question: “Is flushing necessary when changing the oil?” Since this question is topical, correct and useful, we will look for an exhaustive answer to it. But the choice of the option to flush the engine and, of course, the need for such actions in general should be taken by the owner of the vehicle himself.
To wash or not to wash the engine when changing the oil?
Flushing the engine is strictly prohibited when changing the oil in only one case: the car is under warranty and its service according to the service book is carried out in dealer center or certified auto repair shop. The service regulations of all manufacturers exclude this operation. This is due to the fact that the car under warranty must be operated without the slightest foreign impurities in the engine oil.
Filling fresh oil into the engine does not always require flushing
But experienced drivers and many experts also do not advise flushing the engine if high-quality synthetics or semi-synthetics are used. The argument is that the composition of engine oil includes:
- mineral (refined petroleum) or synthetic (synthesized from petroleum in the laboratory) base;
- a balanced set of improving additives (anti-foam and viscosity, antioxidant and anti-corrosion, detergent and anti-friction, antioxidants and deactivators, anti-wear, alkaline and other components).
The result of a stable balance of all additives is an amazing stability, which is observed throughout the entire time left until the next oil change. It is special detergent additives that do not allow sludge, slag and soot to form on the walls and in the oil channels. All contaminants accumulate in the oil itself and are removed when it is changed. Practice shows that many engines of foreign cars on quality oils give a run of many hundreds of thousands of kilometers without the need for flushing.
The quality of fuel in Russia leaves much to be desired, so the issue of flushing is becoming relevant in our country.
But we live in Russia. Our standards are not as strict as in developed countries, and the quality of fuels and lubricants is much worse. There are cases when flushing is needed for any car, regardless of its age, prestige and the type of engine oil used:
- It is necessary to change the type of oil (mineral to semi-synthetic or vice versa); its viscosity (summer, winter, all-weather).
- When switching to another manufacturer's oil (many oils cannot be mixed with each other).
- After a major overhaul of the engine or the current one, if the cylinder head was removed and operations were carried out inside the engine, if the engine was disassembled.
- When buying a car from a private owner, when there is no data on the frequency of replacement and the quality of the engine oil.
- In emergency situations, when coolant, fuel gets into the sump, or you have to add low-quality oil.
Differences in washing diesel and gasoline
Under no circumstances is it recommended to flush a turbocharged diesel engine when changing the oil. AT emergency you can just change diesel oil ahead of schedule. There are no specific flushes for power units running on diesel fuel. Diesel oil has unique properties that engine oils carburetor engines. First of all, this is the creation of the thinnest oil film on rubbing surfaces. Thanks to this film, the mating parts are in a "floating" state, that is, they do not touch each other. Therefore, diesel oil is thicker, designed for more severe operating conditions and has its own set of additives. Any wash does not have these qualities. It contains no such additives. The use of flushes of any type on a diesel engine can lead to sad consequences: either increased wear of the rubbing parts of the diesel engine and early repairs, or its failure in a short time.
Oil for diesel engines more “strong” in terms of cleaning engine parts during car operation than oils for gasoline engines
Working conditions, material for the manufacture of parts, the composition of soot in diesel engines and carburetor engines are very different. True, for cars with highly accelerated power units, universal oils have been developed that can be poured into both gasoline engines and diesel engines. For other types of cars, other types of motor lubricants are not suitable for each other, although 30 years ago, many motorists poured diesel oil from a KamAZ truck or from a K-700 tractor into Soviet cars. But those Volga, Zhiguli, Moskvich and Zaporozhets did not have turbines, injectors, electronic control units, on-board computers and other "bells and whistles". With modern expensive foreign cars, such experiments are categorically not allowed, otherwise all valuable equipment will fly.
Which is better: flushing oils, “five-minute” flushes or folk remedies
Brief description of ready-made liquids for a car
First, let's try to figure out why the problem of flushing the engine arose. During operation, various contaminants are formed in the engine: metal products from wear of rubbing parts, deposits and resins from oil oxidation, products of incomplete combustion of fuel. AT ideal additives that are in engine oil cope with all contaminants. Most oil manufacturers indicate this in the instructions: "The oil contains all the additives that ensure the normal operation of the engine." But real conditions (traffic jams, bad roads, winter weather and other reasons) cannot be called “normal”. With them, the load on the oil increases several times. Car manufacturers in such cases recommend changing the oil more often. But oil is expensive, so this method was invented - to flush the engine before changing the oil in order to get rid of the contaminants accumulated in it. Two options were offered:
- in the USSR with the help of a special flushing oil;
- in Western companies with the help of a variety of additives poured into old oil, helping to remove foreign impurities from the engine.
The disadvantages of the first case are that a significant amount of flushing oil remains in the engine (it is impossible to completely remove it) and a double volume of oil (engine + flushing) must be disposed of. In the West, flushing oils have not taken root, so all the well-known world brands Mobil, Shell, Castrol and others do not produce them.
Not every wash gives the desired result.
Detergent additives poured into small bottles with a volume of 200 to 500 ml should:
- reduce the viscosity of the oil (make it liquid) so that it can penetrate into all the cracks and channels. This is achieved with the help of special solvents, thinners;
- promote the dissolution and softening of resins, sludge, slag. This is achieved with a powerful complex of alkaline detergents;
- turn the washed-out impurities into fine fractions to avoid clogging of the lubrication channels. This is achieved with the help of dispersant additives;
- prevent wear of rubbing parts during flushing with diluted oil. This is achieved by adding an anti-seize component;
- prevent damage to rubber products: seals, rings, pipes, hoses. This is achieved with the help of special additives (esters and silicones) in the right dosage.
Given that all additives in the flush fluid are dissolved in organic solvents that are not base oils, this cocktail greatly impairs the properties of used engine oil and can cause significant damage to engine parts and assemblies. It is categorically undesirable to use five-minute flushing fluids, although many manufacturers and sellers conduct noisy advertising campaigns for their flushing products.
Video: Exposing engine flushes
Flushing oil LUKOIL
Represents mineral oil with the addition of a set of effective detergent additives. They have high detergent, anti-corrosion and anti-wear properties. Flushing oil "LUKOIL" is used to clean the lubrication systems of machine motors. Does not require disassembly. Used before adding new engine oil. Efficiently, quickly, efficiently fights against pollution in the oil systems of engines of all types.
Advantages:
- quickly, effectively cleans the oil system of the power unit from deposits and waste from friction of parts against each other;
- helps to significantly reduce the risk of overheating of the motor;
- reduces the degree of wear of mating parts;
- increases the life of the power unit, subject to regular use.
Detergent additive Liqui Moly (Liqui Molly, Germany)
Motor oil company Liqui Moly has developed its range of flushes for deep cleansing of engine oil systems. Their main difference from cheap products is that Liquid Molly contains special protective additives that eliminate the harmful effects of the flushing fluid on the motor. The company adopted the principle: "The oil in the engine must be efficient and safe."
It is good to apply an additive if you know that the previous owner of the car did not treat it carefully
The manufacturer advises choosing this flush with deep penetration into all hidden places in case of poor care of the power unit:
- oil change was carried out irregularly;
- cheap oils and surrogate fuel were used;
- the engine often boiled;
- when working at low speeds, extraneous noises and knocks were heard.
The German company guarantees the user to maintain the factory characteristics of the engine at the proper level. This applies to power, low fuel consumption, environmental exhaust gases. The engine starts quickly and runs smoothly. Flushing Liqui oil Moly is designed for long-term use (vehicle mileage of 200 km or more).
Advantages:
- Activates the self-cleaning process by adding a special additive.
- The presence of calcium suggests the presence of a powerful package of detergent additives, the concentration of which is 15-20% higher than usual values.
- The presence of phosphorus and zinc speaks of the antiwear components included in the additive.
Video: Liqui Moly MotoClean - Flushing the oil system from the pros
Why Castrol does not consider it necessary to flush the engine with chemistry
Castrol specialists do not develop any flushes for their line of motor oils. They believe that their products are a perfectly balanced engine oil that ensures stable engine operation. The presence of any other additive destroys this balance and does not allow the oil to perform the functions specified by the manufacturer.
Runway flush additive: who should use it
flushing oil system Runway, according to car owners, does not always give the desired result
Flushing Runway 5 Minute Motor Flush, according to the advertising text, is special compound, with the help of which the engine oil system is cleaned of carbon deposits, sludge, resins and other contaminants. Promotes better oil circulation and heat removal from areas of intensive formation. Also, the creators promise to restore the mobility of the piston rings and the absence of a harmful effect on oil seals, valve stem seals and other rubber products. The volume of the bottle is 300 ml, it is used for engines with a crankcase capacity of 3-5 liters.
Folk remedies: diesel fuel, acetone, kerosene, transformer oil, solvent, gasoline
Flushing the engine with diesel fuel, acetone, kerosene, transformer oil, solvent, gasoline and other powerful solvents of various contaminants is popular only among elderly domestic drivers. Such methods were used when there were no motor oils that combined the properties of lubrication, cleaning and washing. Yes, and the engines of domestic passenger cars at that time were much simpler in design, maintenance and operation. Knowing that acetone washes away any contamination, they poured it into old oil: they wanted to use it to wash the engine from the inside. But this is a very dangerous method for the motor, since during prolonged operation on a mixture of oil and acetone, the connecting rod-piston group can simply jam. Today, kerosene mixed with acetone (Lavr flushing fluid) is recommended for cleaning piston rings from carbon deposits and coking. This work is done on a non-working engine. In rare cases, diesel fuel or kerosene is recommended to be used for classic Zhiguli models and older foreign cars. This process consists of the following steps:
- warming up the engine to operating temperature;
- draining used engine oil;
- pouring into the oil filler neck from a plastic container using a kerosene dipstick or diesel fuel. When filling by compressing the sides of the canister, the jet pressure slightly increases, due to which the oil lines are better cleaned of dirt;
- starting the engine and setting it to medium speed, after which it is necessary to let it buzz for several minutes (it is forbidden to bring the temperature of the coolant to the working value);
- draining kerosene or diesel fuel and visual assessment of the degree of pollution;
- substitutions oil filter and pouring new oil into the crankcase.
It is important to know that this method is completely unsuitable for modern machines.
Video: How to flush the engine with diesel fuel before changing the oil
Engine Flushing Process: Is It Necessary?
Many motorists believe that flushing oil lines, cavities, channels, an oil receiver and a motor pump is necessary, useful, and effective. It helps to get rid of most of all kinds of carbon deposits: soot, soot, tar, sludge and other contaminants. Mobility is restored to these same piston rings and hydraulic compensators, oil lines and channels are cleaned, oil movement is noticeably improved. The main idea is that the old oil is more thoroughly removed from the motor lubrication system. There are two types of flushing:
- quick flush, otherwise it is called "five minutes";
- mild or gentle rinsing.
In the first case, the flushing liquid from the container is poured into the filler neck of the heated engine. It works within five to ten minutes. During this period of time, all contaminants exfoliate, loosen and accumulate in the used oil. Then they leave with him. This method must be practiced regularly so as not to damage the oil receiver and oil pump. With a soft flush, the car must travel from 500 to 1000 kilometers so that the engine lubrication system has time to clear itself of soot, soot and deposits. This option is recommended for older engines both in terms of modification and age.
Video: Soft Engine Cleaner Review
Decoking the engine: how to do it yourself
Professional long-term flushes are very effective in removing low temperature deposits and sludge. In addition, they decoke the piston rings. Washing "Laurel" consists of 2 bottles. The first bottle is used to clean the piston rings. All actions are performed with the engine turned off. Flushing with a syringe is injected into the over-piston space. For its effective effect, you need to wait about 12 hours. The second bottle is poured into the crankcase with heated used oil and operates with the engine running.
Decarbonization of the engine by flushing "Laurel"
Flushing the engine oil system using professional flushing agents may not always give the expected effect. This procedure should be approached thoughtfully, carefully, meaningfully. If you think that you can’t do without it, try to pay less attention to advertising. Focus on the advice of practitioners and experts.