300 grams of oil per 1000 km. What oil consumption in the engine should be normal

The problem of engine oil consumption worries many motorists. As you know, lubricant consumption is one of the important indicators of the general condition of the engine. From some car owners, you can hear that the engine does not take oil, that is, the level remains the same or remains within acceptable limits from replacement to replacement.

Others note increased or high oil consumption in the engine, which is necessary. Immediately, we note that the manufacturers themselves separately indicate the rates of oil consumption in the engine. This means that the power unit can consume lubricant within certain limits, and this consumption is not a malfunction.

This phenomenon is commonly referred to as oil waste consumption. However, exceeding the rate of topping up oil in the engine may well indicate the occurrence of problems with the internal combustion engine, engine, etc.

In this article we will consider what "oil appetite" of various power units can be considered acceptable, as well as what factors and features affect the consumption of lubricant in an internal combustion engine.

Read in this article

So, let's start with the fact that all engines consume more or less engine oil. This happens taking into account the design features of the internal combustion engine, namely because of the urgent need to lubricate units and parts. In other words, most of the loss of lubricant occurs as a result of the need to supply lubricant to the cylinder walls.

This area in the engine is a heat-loaded area. For this reason, there is a partial evaporation and combustion of the lubricant. Also, part of the oil is not removed from the cylinder walls, as a result of which the remaining lubricant burns along with the fuel in the combustion chamber.

As a rule, in modern engines, the declared oil consumption is, on average, from 0.1 to 0.3% of the total fuel consumption, which was spent to overcome any part of the path. It turns out that if the car has traveled 100 km, and the consumption is 10 liters of fuel, then the average consumption of 20 grams of oil will also be the norm.

It turns out that the lubricant consumption can be considered acceptable if it does not exceed the mark of about 3 liters. for 10 thousand kilometers traveled. It is also important to understand that the consumption rate will greatly depend on the type of engine, its degree, etc.

For example, for many gasoline internal combustion engines, the norm is around 0.1%. On gasoline turbo engines, the consumption indicator is noticeably higher. Regarding, the declared consumption of lubricant at the rate will be greater than any gasoline analogue and averages from 0.8 to 3%. The specified 3% is consumed by forced turbodiesels with two turbines, etc.

It is also possible to separately mention rotary motors, which are particularly prone to the consumption of lubricating fluid. Such units (taking into account their fully serviceable condition) consume about 1-1.2 liters of oil per 1000 km. mileage. For reference, manuals for different engines indicate that the rate of oil consumption per waste is 1 liter per 3 thousand kilometers traveled, that is, about 3 liters per 10 thousand kilometers.

At the same time, manufacturers also note that the consumption directly depends both on the technical condition of the internal combustion engine and on the features of the operation of a particular vehicle (load on the unit, speed, etc.)

What determines the oil consumption in the engine and how to reduce it

As mentioned above, oil is consumed in any engine, since the oil film on the parts to protect against dry friction burns in the chamber along with the fuel charge. If we add to this the natural wear of the internal combustion engine during operation, then the consumption of lubricant increases further.

However, it becomes quite obvious that 3 liters of oil per 10 thousand km. for a small car with an in-line aspirated engine, it can be considered a high consumption, while for a powerful unit with a large working volume, this is a perfectly acceptable indicator. Practice shows that even if the engine starts to "eat" oil above the norm, it is more economically profitable to just add lubricant than to immediately overhaul the engine only because of the increased consumption.

The fact is that at many service stations, masters prefer not to diagnose a separate cause of increased oil consumption, but immediately offer the owner to make a major overhaul. It is important to take into account that such expensive repairs are not always necessary.

First of all, the lubricant consumption can be increased due to the fact that oil flows out of the motor. In this case, it is sufficient to replace the gaskets and oil seals. As a rule, you need to pay attention to, camshaft oil seals, etc.

In various situations, lubricant can flow on the outer surface (leak out), as well as penetrate into other systems. For example, if the crankshaft oil seal is to blame, and a puddle may form under the car.

If oil is actively consumed in the engine for waste,. In this case, especially in comparison with a leak, it is much more difficult to establish the cause without disassembling the engine.

However, even in such a situation, you can try to fight with waste before agreeing to repairs. First of all, the lubricant consumption depends on the operating mode of the motor. In other words, driving at high speeds leads to an increase in temperature and loads, the oil liquefies, it is worse removed by rings from the cylinder walls, burns out, etc.

It is also important to understand that the lubricant may not be suitable for the engine in certain parameters. This means that you need to know which oil to choose for the engine and what features you need to consider.

If the engine is worn out, then in parallel it is necessary to take into account the peculiarities of the selection of oil for engines with high mileage. In a nutshell, the reduced viscosity material forms a thin film that the oil scraper rings cannot remove from the walls. If the grease is thick, then the film is very thick, while the rings cannot remove such a layer in full.

Given the above, it becomes clear that you need to use the most suitable oil, both in terms of tolerances and in terms of high-temperature viscosity index. For example, from the list of recommended lubricants in the manual, you need to select a product with a higher viscosity compared to what is currently filled.

Each of the solutions has both its advantages and disadvantages, however, for a worn out engine, in many cases it is possible to reduce lubricant consumption and.

An increase in crankcase pressure also causes excessive lubricant consumption. In simple terms, the high pressure of the crankcase gases forces the oil to end up where it shouldn't.

As a result, the lubricant enters the cylinders through the inlet, after which it burns in the engine along with the fuel. In such a situation, it is necessary to diagnose and clean the crankcase ventilation system.

Problems with also lead to the fact that there are lubricant leaks in the area of the supercharger, oil also enters the cylinders through the inlet, etc.
The solution requires diagnostics and repair of the turbine. As a last resort, you can replace the turbocharger, which will also reduce the lubricant consumption.

What is the bottom line

Taking into account the above, we can conclude that the main reason for overhaul of the engine is the presence of significant defects and damage, as well as high wear and tear of parts and wear on the cylinder walls (seizure, change in geometry, etc.).

In this case, it will not be possible to eliminate the oil "zhor" only by decoking, replacing rings, valve stem seals or switching to a more viscous lubricant. Usually, engines with such damage have low compression, start poorly both on cold and hot ones, and significantly lose power.

During the operation of the unit, knocking and extraneous noises may be present. As a rule, after disassembly and troubleshooting, the block needs to be bored / sleeve, crankshaft grinding, etc. In other words, a major overhaul is needed.

If the engine is worn out, but it works normally, while the oil consumption is higher than the norm, then you should not expect an instant increase in the lubricant consumption. More and more lubricant will be consumed, but this problem will progress slowly.

It turns out, adding several liters of grease for every 10 thousand km. will allow you to operate such a motor for more than a dozen thousand kilometers without overhaul (if no other breakdowns occur). At the same time, in terms of costs, it is more profitable to add lubricant than to repair the motor.

Additionally, the use of more viscous oil, replacement of valve seals and cleaning of the crankcase ventilation system will help to reduce the overall consumption of lubricant and the cost of maintaining and servicing the internal combustion engine.

Factors Affecting Increased Oil Consumption

Increased lubricant consumption is a wake-up call for any car owner. As a rule, high oil consumption in the engine is present in vehicles with high mileage. This indicator must be monitored periodically, because a lack of oil can cause expensive repairs.

The oil consumption rate consists of a combination of the following factors:

The age of the motor and its technical characteristics... This also includes timely maintenance, weather conditions under which it was operated, etc.;
Engine type. Normal oil consumption for gasoline, diesel and turbocharged engines varies significantly and this aspect must be taken into account;
The quality indicators of the lubricant itself play a huge role.... Oil viscosity is one of the main criteria for assessing consumption.

It should be noted that an excessive amount of fuel and lubricants in the engine also increases its consumption. A reference level for the lubricant level can prevent costly repairs and save money.

The vehicle can be operated in different conditions (for example, frequent downtime in traffic jams or, on the contrary, driving on suburban roads), which affect the correctness of the information on consumption. A generally accepted indicator for measuring oil consumption in an engine is the ratio of the amount of lubricant used per 100 liters of fuel.

Indicators of normal oil consumption for different types of engines

As described earlier, it is worth paying special attention to the type of engine in your vehicle. Oil consumption for different engines directly depends on their design. Below are the figures for the normal consumption for each type of motor.

Petrol power unit

In motor vehicles, released from the assembly line recently, the normal oil consumption is considered to be an indicator that does not exceed 2.5 ml / 100 l of fuel... It is worth noting that when running in a new car, this figure can be much higher, since the new parts have not yet completely got used to each other.

Permissible for used cars, the indicator is 100 g per 100 l of fuel... Such oil consumption is typical for cars with low mileage and in good technical condition.

Increased oil consumption of about 0.5 liters per 100 liters of fuel is already considered critical... With such a lubricant consumption or higher, the engine can simply jam on the go, therefore, with such indicators, it is recommended to visit the nearest technical inspection point.

Diesel power unit

Normal fuel consumption for diesel engines is at around 300-500 g / 100 liters. The critical flow rate for this type of motor is a flow rate of 2000 g / 100 l. In a diesel engine, overpressure is constantly present, which affects oil costs. Very often, diesel engines are used in construction equipment and trucks that constantly transport heavy loads. All these additional power inputs also increase lubricant consumption significantly.

Turbocharged power unit

It is worth saying that more and more new engines with turbines have appeared recently. There are both gasoline power units with a turbine and modern turbodiesels on the market. The number of turbines can also reach 3 units on one engine.

These powertrains have tremendous power in a completely small size. It follows from this that oil consumption directly depends on engine power, therefore these units are subject to the greatest waste of lubricant.

Even a new turbocharged engine has a consumption of about 80 g of oil per 1000 liters. For the full operation of the turbine itself, lubrication is required, and if there are several turbines, then the costs of fuels and lubricants will be much more significant.

And so, the oil consumption rate of 1 liter per 1000 km or 100 liters of fuel for a conventional engine is a critical norm, and for 2 other types of engines the critical indicator will be 2 l / 1000 km or 100 liters of fuel.

Reasons for overestimating the consumption of oil may consist in a dirty oil filter, its condition must also be monitored and a new one must be installed during a regular oil change.

Why is grease overrun?

Oil inside a car engine can be consumed both naturally and for a number of the following reasons:

Banal overflow of oil into the engine... The increased amount of lubricant forces the oil to push itself through the holes inside the engine. The oil simply evaporates through the ventilation system to the outside and requires further topping up;
Purchasing the cheapest lubricant... Low-quality oil has a minimal viscosity and evaporates more quickly compared to more expensive counterparts;
Excessive loads on the power unit... Too active driving style contributes to an increase in oil consumption, and this indicator can also be influenced by the terrain itself (mountainous, flat, etc.);
Ambient temperature... An increase in temperature is directly proportional to an increase in lubricant consumption;
Physical losses... Usually they are associated with a malfunction of the oil filter, but can be caused by a leakage of the motor itself. Very often the gasket between the cylinder head and the engine housing fails, or the bolts can simply loosen.

Do not forget that a regular oil change should be done at least once every 10,000 km. Such recommendations are usually given by the car manufacturer, but in reality it is better to change the oil much more often. It is believed that no more than 8 thousand km should pass from replacement to replacement, and for cars with increased power, this procedure is advised to be carried out every 5 thousand km.

In used road vehicles, various additives can be additionally used to help reduce lubricant consumption. In the modern automotive market there are many engines that, due to their design features, begin to "eat" oil already in the first year of operation.

The operation of which assemblies and engine parts affects the increased lubricant consumption?

The liquid inside the engine can leak out or evaporate. As a rule, evaporation occurs on the surface of overheated parts and mechanisms. Next, we will describe the main signs of incorrect operation of engine parts, which can affect the "zhor" oil:

The main block of cylinders. Often, the gasket between the block and the cylinder head begins to leak. The problem can be identified visually;
Crankshaft . Similar to the above case, the seals may leak due to severe wear. The problem can be detected by disassembling the motor The oil seals in this case will have to be replaced with new ones;
Oil filter... It may become clogged or simply not properly screwed on. The problem is easy to identify visually and replace this unit with a new one;
Gas control valves... The valve stem seals may fail due to overheating. Oil will begin to seep into the timing mechanism. The problem is eliminated by replacing the rubber caps;
Oil scraper rings... Wear on these piston rings is a very common problem. Bluish smoke from oil fumes begins to flow from the exhaust pipe. The situation can be corrected by replacing the rings;
Malfunction of cylinders... Often, under the influence of high temperatures, scuffing and excessive wear are formed in them. Oil is literally absorbed into these microcracks, causing unnecessary lubricant consumption. The problem can sometimes be solved by replacing the piston and oil scraper rings, but boring or grinding of the cylinders themselves may also be required;
Turbine lubrication. The turbocharger constantly blows air, because of this, it constantly gets very hot. He also needs lubrication in the process. The size of the turbines can be very different, therefore, the total volume of oil in the engine must be taken into account.

Conclusion

This text highlighted the most significant points regarding the normal oil consumption in road transport. The normal consumption that each type of engine should have was described, and the reasons why this unnecessary waste occurs were described.

Should constantly monitor the lubricant level in your car engine. You should not allow both its lack and excess in equal measure. In any case, before using the vehicle, you should carefully study the instructions for its operation. It is also worth using fuels and lubricants recommended by the car manufacturer. In this case, the risks will be minimized.

It should be remembered that oil consumption in motor vehicles with decent mileage is always much higher, therefore, if lubrication costs are more than 500 grams per 100 liters of gasoline or a thousand kilometers, you should contact the service center and conduct a thorough check of the entire engine.

Engine oil consumption is determined depending on the amount that burns out in the engine. can speak either of its poor quality (the lubricant then burns out excessively), or of a malfunction of the engine itself (a leak occurs, most often through the valve seals and oil scraper rings). Everything will depend on the specific numbers and additional symptoms that may appear with a burnout of the lubricating fluid.

How is engine oil consumption calculated?

To determine the rate, it is not the mileage that is taken into account, but the consumption of the fuel resource. Such an indicator is more accurate than the distance traveled, because when you are in traffic jams, the oil is depleted even more, and the odometer does not change its value.

It is customary to calculate the consumption of oil in the engine by its volume of fuel consumed for combustion of 100 liters.

To find out the oil consumption rate in your car engine, you need to use the calculation formula and calculator, or use this online form. It involves calculating the permissible amount of oil for waste according to the type of engine, the volume of operating oil and the amount of fuel consumed, taking into account the state of the piston group.

Calculated formulas for oil consumption

General actual oil consumption for waste during its cycle(from replacement to replacement) can be calculated using the formula:

Qy = ∑q + (Qs-Qsl),

Where ∑q is the oil topped up during the cycle (between TO); Qз - flooded during refueling; Qsl - drained when replacing.

And here the consumption of the filled oil in liters per 100 liters of fuel defined as follows:

Mz = V / (P * k),

Where V is the capacity of the engine lubrication system; P is the consumed fuel k is the coefficient taking into account the wear of the piston group (k - for a diesel car 1.25; gasoline 1.15; turbo 1.3).

Oil consumption rates increase up to 20% for vehicles after major repairs and in operation for more than 5 years.

Engine oil consumption rate for waste

For passenger transport, a normal indicator of waste is a consumption of 0.005 - 0.025% per 100 liters of fuel, which is approximately 5 to 25 grams of oil per 1,000 km. In a worn out engine, up to 0.1% and 100 gr. by 1000 km, respectively. Well, if the car is working at the limit or has a turbocharged or diesel unit, then such a rate will be even greater.

For freight long meters oil consumption rate 0.3 - 0.4% of fuel consumption. The calculation formula uses the amount of burned fuel and added oil during this period. But this calculation of oil consumption, assumed by the automaker Scania, is relevant only for heavy cars with a large engine. Calculations of the consumption of lubricating fluid in passenger cars, both with diesel and gasoline engines, have a slightly different form.

Engine oil consumption rate per 100 liters. fuels for cars

For VAZ carburetor cars, the norm is a consumption of 0.3 to 0.4 liters. for 100 liters of fuel.

A gasoline engine operating at the limit of its capabilities can consume from 0.4 to 0.6% at 100 hp. of consumed fuel, which is approximately 400 - 600 grams of engine oil per 1000 km of run. With a diesel engine, the situation is exactly the same - the consumption of lubricant by the engine increases by 0.5%. But if these are forced turbodiesels with two turbines, then the consumption can reach up to 3% of the volume of oil poured into the engine.

Please be aware that oil consumption rates significantly increase for vehicles after overhaul and in service more than five years.

The average indicator of the engine oil consumed by the engine after a run of 150 thousand km is 0.35 - 0.55 liters.

Method for determining oil consumption

Oil level on the dipstick

Determination of the actual value of the specific consumption of engine oil for waste is carried out with a mileage of 200-300 km. During the test drive, the car must be in good technical condition. The oil level in the crankcase must be between the "MAX" and "MIN" marks on the engine dipstick. Before the test run, it is necessary to warm up the engine, the oil temperature should be 80-85 ° C. Drain the oil on a level surface. It should drain from the pallet within 15 minutes. For the accuracy of the result, it is advisable to determine not the volume, but precisely the weight, since the amount of lubricant remaining in the filter can be found only by weighing it.

How to use the calculator

One of the main roles in this calculation is played by the volume of fuel burned and the volume of operating oil, as well as the type of engine. It is with regard to this volume and the specifics of the work that the specific oil consumption is calculated.

To calculate the specific oil consumption in the engine, the following data are required:

In the field "fuel" - enter the average fuel consumption in liters, per 1,000 km. mileage (by default and based on the calculated formulas, this is 100 liters);
In the field "oil" - the volume of oil that is regulated by the manufacturer as required when filling;
Select the type of engine and mark if the machine has been in operation for more than 5 years
Click "calculate".

Please note that the results of the calculator for calculating the permissible engine oil consumption rate are a general case and for some engines (assumed by the specifics of the design) may be inaccurate and need to be adjusted.

Such a calculator can be an indispensable assistant for calculating the consumption rate of lubricants intended for the operational accounting of the specific consumption of engine oil when justifying the need for them. After all, if not all, then many motorists are quite alarming about the consumption of oil in the engine. This service will show if you fit into the nominal values. If not, then you will have an objective reason to look for the causes and possible problems.

What's the bottom line

That is, if the engine is in order, then it practically does not take oil, and you will not need to top up until the next change. Its level will be within the permissible limits on the dipstick (within the min / max marks). But there are cases when the manufacturer indicates the consumption rates for a particular power unit (some), then its topping-up is considered natural and is not a malfunction, but on average it does not exceed 1-2 glasses from replacement to replacement.

It is important to understand that the harder the engine runs, the more oil burns in it. So, for example, the higher the number of revolutions, the more oil will remain in the cylinders of the car engine. Although, one should not forget not only about the operating mode of the engine, but also about its design. And you should not neglect the tolerances of engine oils and fill in fuels and lubricants of dubious quality.

Reasons for oil consumption. Part two.

Internal problems - caps, rings, decarbonization and other solutions.

Large oil losses through leaks (the situation described in the first part of the article) is a rather rare situation, so blame them on causes of oil consumption more than 200 grams per thousand kilometers of run is somewhat naive, if there is no oil trail behind the car like Shchors. Accordingly, if the oil does not go outside, then it goes inside.

Actually, to understand where it goes, it is enough to remember the engine design. We found a great video on the net (sorry, not from Honda, but this does not diminish its attractiveness in any way), explaining the composition of parts and the principle of engine operation much better and faster than any textbook, and we suggest you watch it before continuing the article further.

As you can see from this video, the heart of the engine is the combustion chamber, in which all the processes take place that “revive” the engine, transforming it from a set of spare parts into a device that can move the car. It is to this “heart” that oil flies away in a “tired” car, burning there and turning into smoke. By the way, it is smoke that serves as a criterion for determining a car that burns oil. And again, many car owners often come to the service with a riddle that goes something like this: "where does the oil go if there is no leak and there is no smoke either." At the same time, they proudly “gas” at the entrance, demonstrating either its complete absence or a faint haze, which is difficult to suspect of anything. But, unfortunately for the car owner, we know the answer, and show him where the oil is spent.

Here it should be understood that the characteristic bluish (gray-blue) smoke manifests itself well only on a loaded engine, almost completely disappearing in neutral, or parking gear! Do you think your car is special, it eats oil and doesn't smoke? Ask someone to get behind the wheel and get in another car and drive your own. Almost certainly, when accelerating, or when changing gears, you will see how your car smokes. This, not to say that it is normal, but it is natural, it is just time for the engine to “see a doctor” for repair, which will eliminate the ingress of oil into the combustion chamber.

But it can get there in two ways and in three possibilities:

2.through the gaps between the piston rings and the cylinder walls

3. through both paths at once.

Valve seals, - mechanical rubber goods. serving to seal the clearance of the valve stems so that the oil present in the cylinder head does not enter the combustion chamber through them. Caps, in fact, are the simplest stuffing boxes operating in an extremely aggressive environment, the essence of which is the constant reciprocating valve movements, which wear away the surface of the caps, which leads to their wear. However, the caps in Honda vehicles can travel more than 100,000 km without any problems. Replacing them, the operation is not the most difficult, but quite responsible. Technically, it is possible to replace the valve stem seals without removing the cylinder head, right on the machine. Such repair, although it represents a special form of unconventional relationship with the car, is nevertheless quite cheap, since it only requires the right number of required caps (8 or 16, while the intake and exhaust caps are different!) Costing about $ 3-5 apiece, as well as a master who agrees to this procedure, who will take about $ 70-150 for his work, depending on the car model and the engine installed on it.

The problem with this operation is that, according to statistics, a lot of oil usually does not leave through the caps - the productivity of piston rings in the same operation is a much higher percentage, therefore, if the oil consumption is more than 500 grams per thousand kilometers, - it is better not to spend money on replacing the caps, but to think about more complex repairs - replacing the rings.

Piston rings, by themselves, are a very important element in the normal operation of an engine. They are made in such a way that in the cold state, they are mobile and move freely enough in the grooves on the piston intended for them, while the edges of the ring do not touch, leaving a gap that is approximately 8-11 mm by eye. This clearance (lock), as well as the clearance along the height of the ring, is extremely necessary for the normal operation of the engine. expanding during operation, the ring becomes almost a monolith, merging with the piston itself into a single unit, sliding without play along the cylinder walls. Thus, compression is achieved in the engine, on which the efficiency of its work directly depends. The rings themselves are divided into two types - compression (two or three upper rings) and oil scraper rings, - a lower compound ring with a separator. The task of the compression rings is to create compression, the task of the oil scraper rings is to remove excess oil from the cylinder walls when the engine is running, leaving just as much as is necessary for the normal operation of the engine, but not allowing the compression rings to “throw” excess oil into the combustion chamber. All this is happening constantly and at a very high speed. It took you 10 seconds. to read this paragraph, during this time, a serviceable engine operating at idle speed about 100 times tried to throw oil into the combustion chamber, and the working oil scraper rings prevented this 100 times. When driving, this process is accelerated up to 1000 times in the same time, that is, as you understand, the load is constant, and very serious.

What happens to the rings when they wear? The aging process of rings can be divided into three different directions. First, the outer side of the compression ring is erased, rubbing against the cylinder wall, which causes a gap between the wall and the ring. Secondly, there is a process of abrasion and thickness of the compression ring, that is, it becomes thinner and dangles more freely in the piston groove. This is fraught with the effect of a water pump - thinned compression rings, using the gap between the wall and the cylinder, begin, like a pump, to pour oil into the combustion chamber with enviable constancy, which leads to the highest oil consumption of all possible options. And, finally, thirdly, when using low-quality oil, or with long change intervals, the oil acquires the properties of coke, - soot, which settles on the parts, turns to stone. Moreover, it settles first of all where it is easiest for him to create himself - on the oil scraper rings, which, naturally, being captured from solid coke, stop working completely, and this entails all the problems described above at once.

The end effect of this whole process is a high oil consumption (about 1 or more liters per 1000 km), accompanied by a fairly even and stable compression (about 12 per cylinder), which is kept due to the presence of oil on the cylinder walls. By the way, it is for this reason (wear of the rings) that cars can start badly in winter - until you sprinkle oil on the cylinder wall through the spark plug channel - the car will not start!

What to do in a situation with high oil consumption due to wear of the rings? One of the options for solving the problem for modern motorists is offered by manufacturers of auto chemical goods. Now on the market there is a huge number of all kinds of preparations for decoking (i.e., removing the very coke that paralyzes the operation of the oil scraper rings) of the engine. Their cost differs sometimes several times, depending on the miraculousness of each specific sample. However, our personal opinion is that decoking is a procedure that should be done only if you have a spare engine in mind, or if money has already been set aside for normal engine repairs, and here's why.

The decarbonizing agent is an extremely aggressive substance. To understand how aggressive it is, imagine that in order to remove the coke mechanically, sometimes you need tools such as an awl (for punching coked holes in the piston), and the rings themselves often break when trying to free them from coke with a knife blade. or a cutter. “Quality” coke is difficult to take with coarse sandpaper or even a special file. And in the case of the drug, it is promised the dissolution of these deposits with the help of chemistry. But what about the oxygen sensors that are on the exhaust tract, sometimes costing $ 400-500 apiece (and there are two of them on most cars)? But what about the catalyst, which is in the same place, costing more than $ 1000, which will definitely take a hit upon itself after starting a newly decoked engine ?! The consequences of such a procedure can be very expensive for the owner of a modern car, technically more complex than a Zhiguli.

In addition, - decarbonization cannot help the problem of worn-out compression rings in any way - they will not recover on their own. By the way, quite often, after the decoking procedure, engines with very high mileage, I start to devour oil simply with cans, although before decoking the consumption was more or less tolerable. It turns out that sometimes coke can play a "positive" role, fixing the compression ring in the groove, preventing it from dangling, in order to avoid the "pump" effect. But after decarbonization, the released ring begins to "walk" at the landing site in any direction, ensuring uninterrupted oil supply to where it should not be at all, that is, to the combustion chamber! Therefore, in our opinion, decoking for modern cars is a dangerous, harmful, and stupid procedure, and it should be carried out only if you really want to spend more money. For those who do not want to waste money and are going to drive the car further, it is recommended, nevertheless, to change the rings.

The operation itself to replace the rings is not so difficult and difficult - it is enough to remove the cylinder head, the pallet, pull out the pistons along with the connecting rods, remove the old rings, put new ones and assemble everything in the reverse order. The problem is the cost of this repair and the associated operations.

Many who do not know all the intricacies of this work put four key expenditure items in the event budget: rings, caps (as they say, "at the same time"), the cylinder head gasket (it must be changed unambiguously) and the cost of the work, which most garage craftsmen estimate at $ 150 -200. However, it should be remembered that in the process of replacing the rings, the engine defect is inevitably going on, so you will almost certainly also have to spend money on connecting rod bearings (one original insert costs about $ 20-30, and eight of them are needed), grinding in the valves (in fact, very a responsible operation, the quality of which determines the performance of the car) oil change, replacement of antifreeze, replacement of most of the sealing rubber in the engine, sometimes grinding of the cylinder head and replacement of the timing belt is required ... That is, the budget of the event can grow several times. But, in the end, you get a car with a practically new engine, which, if serviced by a good master, can work about 100,000 km without any problems!

It should also be said about the materials used in the repair. In most vehicles it is possible to make a “parity” list of necessary parts, consisting of both original and duplicate parts. This can significantly reduce the cost of repairs, with minimal loss in quality. So, most of Honda cars can be offered to use, instead of the original liners, matched by color, expensive and almost never available, the liners of Taiho, the supplier of the Honda conveyor. They do not have a color mark, which, of course, can affect the reliability of the unit, but the less loaded the engine, the further this prospect of unreliability.

The same can be said about piston rings - expensive original ones ($ 40 per set per piston) can be easily replaced with a duplicate of Rikken or NPR, which run quite well in lightly loaded engines.

Whatever we recommend to save on - caps (there are good duplicates on the market, but for reliability it is better to use the original), a cylinder head gasket, all gaskets and oil seals, as well as a timing belt. It is better to put these parts only original, in order to avoid reopening.

We would also highly discourage putting duplicate parts in cars whose engine is designed to work under heavy conditions - all SIR, TYPE R, and other non-sporting versions of Honda cars. This, of course, does not apply to third-party special tuning kits.

At the end of this article, I would like to say that the main difficulty in this whole process is not the selection of spare parts, but the search for a good master who can do all the work responsibly and professionally. The quality of training of modern "minders" is very different - a master can work with Zhiguli all his life, but this does not make him a repair master, say, Toyota. Likewise, a person who has specialized in Mitsubishi engines for many years cannot be considered a Honda engine repairman, and vice versa. Specialization of the master is the main guarantee of high-quality engine repair. Therefore, if your car consumes oil, and you are already tired of constantly adding it, contact a good specialist who will tell you what is cheaper, to repair the engine, or maybe even replace it (there are a lot of offers of contract motors on the market, especially for right-handed cars). The main thing - do not despair - everything is being repaired, the only question is how much it will cost!

Honda vodam.ru

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