Competent running-in of the engine after overhaul. Engine break-in after overhaul: rules and recommendations

Earlier, when the main models of cars on the roads of the USSR were classic Zhiguli VAZ, none of the drivers even doubted the need for a run-in. And they did this not only after buying a new car, but also after completing overhaul engines.

Now, especially in the last few years, many owners are sowing such statements that, they say, running for modern engines VAZ is not needed at all, and leaving the car dealership, you can immediately give the engine maximum speed. But you should not listen to such owners, because their opinion is based on nothing at all, and no one can give real facts on which it is not worth running the engine. And here back side more than real.

It doesn’t matter if you bought a new car or made a major overhaul of the internal combustion engine, it is imperative to operate the engine in sparing modes for several thousand kilometers. More detailed advice and recommendations in this regard will be given below.

Running-in of VAZ "classic" and "front-wheel drive" Lada cars

First you need to provide a table maximum speed and speeds in each gear during the first thousand kilometers of operation of your car. For classic models Zhiguli it is as follows:

As for cars with front-wheel drive from the VAZ family, such as 2110, 2114 and other models, then the table is very similar, but still it is worth giving it separately:

In addition to high-speed modes and maximum possible turnovers engine, keep in mind the following recommendations:

1. Try to avoid, if possible, sharp accelerations and braking, because brake system ineffective in the first days of operation of a new car. The pads must be properly rubbed in with the discs and drums, and only after a few hundred kilometers will the efficiency increase to a normal level.
2. It is forbidden to overload the vehicle excessively, and also to operate it with a trailer. Excess weight puts an excessive load on the engine, which can adversely affect the quality of break-in and further work. power unit.
3. Avoid getting into situations where the wheels of the car are slipping. That is, no dirt and deep snow to avoid overheating the motor.
4. All rubber and hinge parts also need to be worn in, so try to drive as slowly as possible on rough roads, avoiding potholes, etc.
5. It is worth paying attention that not only increased, but also too low rpm, so you should not move at a speed of 40 km / h, for example, in 4th gear.
6. Follow the general technical condition your car, spend regular check threaded connections, especially for the chassis and suspension. Also, check the tire pressure, it should be the same in each wheel and not deviate from the norm.

As for the break-in after ICE repair, then the basic recommendations are the same as for the new motor. Of course, the first few minutes of engine operation are best spent on a stationary car, allowing the rings to run in a little with the cylinders without unnecessary load.

If you follow all the above recommendations, you can be sure that the life of the car and engine, in particular, will increase compared to the cars of those owners who squeeze all the juice out of the car in the first days of operation.

The problem of running the engine sooner or later arises in front of any motorist. This may be due to the overhaul of the motor, the replacement of rings in it, or the purchase of a new car. By itself, this procedure is not difficult. But the running-in of the engine ultimately determines how it will be during further operation, and it must be approached with an understanding of the importance and necessity of such a process.

Why is a new engine running in?

Here you immediately need to define the terms and understanding of the situation. Under the concept of a new engine, any engine that has undergone any changes falls, whether it is even after boring cylinders, replacing rings or overhauling. The need for this approach is explained by the fact that the surface of any parts has a peculiar relief, consisting of tubercles and depressions.

Naturally, the microrelief does not match for different parts, with their joint work, for example, the movement of rings along the walls of the cylinders, the surfaces are paired with each other, tubercles are erased somewhere, and somewhere new depressions are formed. All this is accompanied by increased friction, the formation of metal microparticles and their entry into the oil, which leads to additional loads on the motor.

It is assumed that the engine run-in is carried out in a sparing mode with the maximum possible limitation of the resulting loads. For many years of operation of the internal combustion engine, the method of running in any engines, even diesel, even gasoline, has been worked out, both in winter and in summer. A correctly performed break-in procedure allows the motor to realize its full potential, while its violation reduces the life of the engines, and ultimately the machine.

Types and methods of running-in

For getting good result engine break-in after overhaul, or in any other such a case, is carried out in several stages and in a certain order. On each of them there are restrictions associated with the emerging loads for the engines.

Cold run-in of the engine after overhaul

Such an operation is best carried out in the conditions of a car repair enterprise or a large vehicle fleet. Cold break-in implies that everything is spinning at the engine, all its parts and components are operating normally, but the engine itself is not running. This mode allows you to implement a special stand. Usually, cold running carried out after a major overhaul for the motor. To do this, the motor assembled after the overhaul or replacement of the rings is placed on the stand, and its crankshaft is connected to an external electric motor.


In this case, coolant and oil are poured into the engine, and then a cold run-in is carried out, i.e. the crankshaft rotates under the action of an external electric motor, the pistons move, and the power unit itself remains idle. A similar procedure is carried out in the same way for gasoline and diesel engines.

Such cold running allows for the initial grinding of various new parts when they work together. However, as can be seen from the above description, a stand is needed for such a break-in, so it will be impossible to carry it out for the engine of a new car. In this case, you can use another technique - run in the engine of a new car when towing, for which no stand is required. A similar running-in of a new power unit, as well as a motor, after a major overhaul has been made to it, can also be performed in other cases when the stand is not available.

The run-in car is attached to the towing vehicle through a rigid hitch, candles are unscrewed from the engine of the new car, and the towing vehicle drags it for an hour with the gear engaged. Efforts through the wheels of a moving machine are transmitted to the power unit, and cold running is carried out.

Running in the engine of a new car

First of all, such a break-in is necessary for a new car, but it is advisable to carry it out in any other cases - after a major overhaul or replacement of rings. Do not forget the most important rule - reducing the loads for the new motor significantly prolongs its "life" and allows you to get everything that it is capable of. The entire break-in procedure, regardless of whether it is carried out for gasoline or diesel engine, summer or winter, it is advisable to carry out in parts.

First start

Of course, this will not be the very first start of the engine, it will present moment has been working at the factory for some time, will be tested as part of the car, and even, most likely, the new owner will be able to get on it from the car dealership to his garage or permanent parking lot. Nevertheless, this stage must be taken responsibly and simply acknowledge that the first engine start is being performed.

It is possible that when you have overhauled or start the engine after replacing the rings, you will indeed have the first start. IN this case must follow the unwritten rule experienced drivers– the engine of the machine must Idling"burn" a tank of gasoline. Maybe it will not be a whole tank, but the fact must remain unchanged that for engines of any type, initially its operation for a long time should be idling.

This approach is due to the fact that the loads on the motor are already quite high, all moving parts rub against each other, which causes local overheating and, as a result, the appearance of metal microparticles in the lubricant. Idle operation reduces the resulting loads to a minimum, which is especially useful for engines after overhaul or replacement of rings.

The explanation is quite simple - in the conditions of the manufacturer, the quality of the parts used is guaranteed by the entire system operating at the plant, but in the conditions of a separate workshop using parts third party manufacturers, as well as in case of acquisition necessary spare parts from the outside, any deviations in new parts can be expected.

After the engine starts, it is necessary to constantly monitor the temperature in the cooling system and oil pressure (the light on the instrument panel should signal its absence).

During such a break-in, the engine cooling fan will turn on repeatedly, there is nothing wrong with that. To eliminate such overheating, you can open the hood, especially in winter this may be quite sufficient. Well, you should not use cheap and low-quality varieties of oil.

Engine break-in on the first five hundred kilometers of run

When driving at first, it is necessary to avoid overloading the engine, for which purpose choose travel routes that do not require full engine load, and also exclude movement at high speed. Best Option will drive in a gear less than necessary. For example, if on a normal, run-in car you would move in fourth gear, then for a new car or a car after repair, it is better to use third.
This practice will avoid overloading the motor and carry out its normal break-in.

Running in a new engine with a mileage of five hundred kilometers to two thousand

This is one of the final stages of engine break-in. A similar statement is true for a new and for a motor after repair. There are no special requirements for the operation and maintenance of the motor at this time. The main requirement remains the same - to avoid overloading, and in this way you can drive almost as usual, it is not recommended only to "spin" the engine more than three thousand revolutions. And do not forget about changing the oil filter and oil after a run of two thousand kilometers.

When does the break-in of a new engine end?

IN in general terms, running-in of the power unit after repair, or on new car after a minimum run of two thousand kilometers, can be considered completed, the run-in itself is recognized as completed after ten thousand vehicle runs. However, the motor does not yet show all its capabilities.

So, on VAZ cars, and this is confirmed by practice, only after thirty to fifty thousand mileage, the engine, as they say, “opens up”. And if, when you press the gas pedal, you feel that you are pressed into the back of the seat, and a confident bass song of the engine is heard from under the hood, you can assume that everything is done correctly, and the engine will be your faithful assistant in any situation.

Running in the engine, even after a major overhaul, even for a new car, is an obligatory stage through which any car must go. If everything is done correctly, then the motor will serve for a long time, being reliable and demonstrating all its capabilities to the full, as intended by the developers.

Overhaul of the engine is carried out with a number of indicators: excessive wear of rubbing parts, a drop in the power of the power unit, an unusual increase in fuel and oil consumption, a dramatic decrease in start-up properties, an increase in toxic indicators exhaust systems etc. When repairing the engine, all rubbing parts and assemblies are replaced. If there are any malfunctions in the engine, and they cannot be eliminated, the engine is overhauled. The overhaul of the engine is the last stage of the repair of the power unit and includes full recovery performance characteristics.

How to roll by the rules

After the overhaul of the motor, almost all the parts are new and not lapped (if you increase them, the surface will be rough, not smooth), and for riding full power, it is necessary that all rubbing parts are perfectly ground. Proper running allows you to achieve this to the full extent. The engine is run in with mandatory replacement oils, in order for all installed, updated details started rubbing against each other. Engine break-in includes running the engine for idling driving at low and medium speeds. Oil after overhaul, to increase the working life of the engine during break-in, it is necessary to change several times. But if you received the engine after a major overhaul, you should first ask experienced minders how to break in the engine.

The overhauled engine is almost like new and should be operated as economically as possible. What happens if you do not break in the engine after the overhaul? With a probability of up to 100%, there will be problems with oil getting into the air cleaner, problems with starting the engine, and possibly increased consumption fuel. Do not neglect the running-in and check the strength, the new heart of the car at full capacity, otherwise in the future such an attitude can lead to many, minor and major malfunctions.

How to roll yourself

At factories and specialized stations there are special stands where new ones are run in (or after an engine overhaul), there are also specialists there who know how to properly break in an engine of one configuration or another. But how to break in the engine if there is no way to contact the service station?

Running in the engine after overhaul should be accompanied by several points:

1. Charge the battery to full capacity;

2. Check the performance of the starter; This is necessary so that there are no problems with the rotation of the crankshaft in advance, as it will be a little tight;

3. Replace, if necessary, the oil filter with a new one;

4. Measure the oil level and fill it up to the upper mark and wait 10 minutes for the oil to glass into the pan. It must be understood that the oil must be of high quality;

6. Cover up air damper based on weather and temperature. If it is winter outside, then you should heat the crankcase with some kind of heating device - a heat gun, a gas burner;

7. Start with a starter, while monitoring the oil level on the pressure gauge and pointer on the instrument panel. The first start of the engine after the overhaul may take longer than usual, but do not worry - this is filling the power system;

8. The instruments should show the oil level at around 3.5 - 4 kg / cm2, immediately after that, start warming up the engine at idle. It's okay if smoke came out from under the hood - it's just burnt oil that got into the engine, the smoke will soon pass;

9. After that, we start the radiator fan and wait until it works, then turn off the engine;

Then we wait until the engine cools down, up to 40 degrees (that is, it will be slightly hot or warm). After that, we start the engine warm-up cycle again. And so 10-15 times. After that, you can start running the engine at medium speeds. To do this, you need to start the car and increase the speed to 1000, about 3 or 4 minutes, then the same amount at 1500 rpm and 5 minutes at 2000 rpm. After that, you can start running on the go. You need to drive within 60-70 km per hour, avoiding high gears.

It is advisable to read the operating instructions for the machine, it contains all the speed modes available during the break-in. After a couple of kilometers, you can begin to adjust the speed. Running in the engine after repair should be accurate, do not heavily load the engine. Increase the load very carefully, and maximum load give after 10-15 thousand run. In the future, before driving, it is worth warming up the engine for 5-10 minutes, keeping it at idle.

What Not to Do

1. Increase the speed to 2000 rpm;

2. Excessively load the car with cargo, including passengers;

3. Dramatically reduce speed and speed;

4. Don't ride high and hard low gear. Need to alternate speed mode, since during this period smooth running and efficiency of the engine are formed;

5. Drive on freeways, drive during the day. This will certainly lead to a sharp drop in speed and speed, which is fraught in the future. It is better to run in a wasteland, in the evening;

You also need to listen extraneous noise and knocks when the engine starts for the first time after overhaul.

Separately, you need to write about changing the oil during the break-in. The oil, after the engine has been overhauled, should ideally be changed 3-4 times. This is necessary for better grinding of parts (with frequent replacement oils, ultrafine fractions of wear products are washed out) and increased resource engine in the future. The first time to change the oil after a major overhaul, it is necessary after 500 km of run, the second time - after 1000 and the third after 1500-2000 km of run. It is worth using high quality oils recommended by the manufacturer. Cheap oils have almost no EP additives.

When the break-in is completed, it is recommended to change the oil for the last time and flush the engine. Only after that you need to fill synthetic oil. It is also worth mentioning the viscosity of the oil. During summer break-in, viscosity oil should be used: 15W -40 or 10W -40. In winter 10W -40 or 5W -30. The API motor oil classification system recommends the use of low-viscosity oils, supposedly they accelerate the running-in of parts, despite the fact that more viscous oils do not allow roughness of the upper layers of parts. Some manufacturers prohibit changing the oil at the initial break-in stage, as branded oils manufacturers contain a special additive package that accelerates the grinding of parts.

1 Replace the oil filter (Since it becomes clogged with metal filings resulting from the friction of parts);

2 Tighten threaded connections;

3 Adjust valve clearances;

4 Tension or loosen the belt or tension chain;

5 Adjust the timing drive;

There may be a great many reasons when the engine does not start after a major overhaul. They are usually divided into two groups. The first is poor-quality repairs: the marks between the shafts are probably incorrectly set, the problem is in the timing drive, there may be debris, rags in the engine, etc. The second, when the engine does not start after the overhaul, is insufficient oil injection into the lubrication system and, accordingly, the hydraulic compensators do not work. The first is solved by diagnosing and re-parsing the engine, the second is solved by the forced supply of oil to the oil pump and subsequent pumping of fuel.

Running in the engine after overhaul can be cold. Cold running of the engine is the forced cranking of the crankshaft, cylinders, etc. in a forced mode with a given frequency and a certain time. Cold break-in eliminates the fact of damage to parts from a sharp change in cold temperature to hot, since the components after the overhaul of the motor heat up more than usual (everyone is familiar with physics - when heated, the metal expands and vice versa). With such a sharp change in thermal conditions, the gaps between the parts may increase or decrease, there will be hanging friction and excessive wear.

They use cold break-in at special stands of service stations, for some engines - their own stand. Typically, a cold run-in lasts about three hours. Craftsmen run the engine in the "cold way" with the help of electrical appliances, manually, by tow, etc. The right tool and equipment, as well as the subtleties of the procedure, only specialists know.

Running in a diesel engine is no different from running in a gasoline engine, but here are the basic conditions:

1. The period up to 10000km is the break-in period;

2. It is not allowed to sharply increase the speed;

3. Long-term increased speed (over 3,000 rpm) is not allowed;

4. It is not allowed to overload the car;

5. It is not allowed to start a "cold" engine, it is necessary; warm up for at least five to six minutes;

6. Running in a diesel engine, if a turbine is installed on it, does not allow the engine to stop immediately after a fast ride;

7. Oil and filter change after 2000 km run;

8. After the break-in, the engine is diagnosed;

Many car enthusiasts know that every car needs repairs from time to time. However, few people understand that engine break-in is mandatory.

When is a break-in necessary?

It is produced when they interfere with the motor:

• minimal (camshaft or chain replacement). Then the engine is run in at a minimum - 500 km;
• engine overhaul. At the same time, running in is 1500-2000 km;
• replace the block liners or piston rings. For break-in, in this case, it is necessary to go 3-4 thousand in a gentle mode (speed 50 km / h) and no “jerks” for the engine and revolutions over 2500.

The problem in this situation may be that the new rings fit into the worn piston grooves. When the pistons are very “gotten” and the groove is badly broken, then there is a high probability that you will break the rings when you first start the engine.

In this case, the brokenness of the groove is assessed by visually looking at the old ring. When its lower surface is glossy and plays a little waviness in the sun, and when you run your finger over the surface you feel wear steps, then such pistons must be changed unambiguously.

Basically, the grooves in the pistons are spaced so that their bottom surface tilts down a little. Therefore, the old ring wears along its bearing surface at the same angle. The new ring will then begin to twist and, in most cases, break.

The fact is that piston wear can be determined precisely by the brokenness of the upper groove (compression). All other rings, except for the compression one, are almost not subject to wear.

Run-in secrets

With this procedure, carry out (after 800 km and 2000 km). Oil take 10W-30. There is also a more correct running-in.

After all, it is produced when the car is still new or after a major overhaul. This is done so that all the components and parts of the car get used to each other. With the correct implementation of this process, their resource increases dramatically.

With poor quality work, many troubles await you. Among them:

• the presence of oil in the air cleaner;
• increased fuel consumption;
• problems when starting the engine, etc.

Therefore, when you have just bought a car or made a major overhaul, it is imperative to follow some rules.

Break-in rules

The main and first rule is not to load the car. It is not worth it:

• drive at high speeds;
• load the car with an excessive amount of cargo and passengers;
• slow down sharply;
• drive in low gears.

This rule must be observed up to the mark of 1500 kilometers.

Rule number two is to watch your speed. When your car has not yet traveled 200-300 kilometers, you should not give gas to more than 80 km / h. At the same time, you must try to move with constant speed and don't switch to .

It is better, of course, for these purposes to choose a track with low congestion and without hillocks. In this case, you should leave late in the evening. Because at this time there are few cars on the roads, which will favorably affect the whole process.

If the car has passed more than 300 kilometers, you can add speed, but gradually. However, in any situation, try to maintain a stable speed for the time being.

Rule number three - do not spare oil. It is worth changing it at least 4 times during the entire break-in. The first time the oil is changed after five hundred kilometers.

The second - after a thousand kilometers, along with flushing the engine. Then after 1500 km and at the end for the last time after 2000 km.

It is worth using natural pitchfork oils of high quality, which are recommended by the manufacturer. When the break-in is over, we change the oil for the last time and flush the engine. But after that it is possible to fill in synthetic oil. After all, it is no longer capable of damaging the engine.

Next time you can change the oil after 5000 miles. When the machine is accustomed to soft operation, then the load should be given to it gradually. After all, any car is very sensitive to sharp drops loads. In this regard, it is necessary to take care of the health of your “iron horse” closely, because this will save you time, money and nerves.

A well-run car rarely hits, consumes fuel more economically and “runs” faster.

Breaking in any engine is the responsibility of every motorist. After all, its resource and reliability of work depend on it. And it is necessary to start such a process with the choice of oil. At the first 500 km of run, oil with the following viscosity classes (SAE) is suitable:

• in summer - 15W -40 or 10W -40;
• in winter - 10 W -40 or 5W -30.

According to requirements API oil for running in gasoline engines must comply with class SG. The fact is that this opinion is at odds with the recommendations of some manufacturers. They recommend the use low viscosity oils, which speed up the running-in of parts.

Such recommendations are explained by the fact that the engines repaired in their car services allegedly have some deviations in size and shape. But to use more viscous engine oils in the engine is preferable. Because they do not allow the roughness of the working surface.

The initial stage of such a process is best carried out not only in motion, but also stationary. To do this, there is a cold break-in of the engine, which takes about three hours. Together with it, it is possible to adjust the ignition and the power system.

In the future, it is possible to run in motion. For implementation good repair Precise equipment, appropriate tools and quality spare parts are required. In our conditions, this is extremely difficult to achieve. Therefore, it is desirable to extend the break-in period to 3,000 kilometers.

For this you need:

• initial 1000 mileage exclude high revs engine (no more than 4000 rpm) and at low loads (maximum two passengers can be transported);
• at cold start - ;
• the initial 500 km of run you need to move on high gear in two calls and only on the highway. So you will achieve high-quality running-in of cylinders, pistons and piston rings;
• when driving in the city, in no case do not use low speeds at high loads;
• comply with all manufacturer's recommendations regarding speed and gear shifting.

Together with the initial oil change, it is necessary to carry out:

• tightening of threaded connections ( oil pan, starter, block head, etc.);
• valve clearance adjustment;
• check the tension (chain) of the belt;
• adjust the timing drive, etc.

If you notice extraneous noises or knocks that were not observed at the beginning of operation, it is imperative to find the cause of this phenomenon. It may be necessary to disassemble the engine again to do this.

How to break in a diesel?

In order to carry out a high-quality running-in of a diesel engine after a major overhaul, it is necessary:

• observe the break-in period, which lasts up to 10,000 runs and depends on how the overhaul itself was carried out;
• do not allow during break-in sharp rises engine speed;
• do not use for a long time increased speed(with 2000 runs no more than 2500 revolutions, and up to 10,000 runs no more than 3200 revolutions);
• do not overload the engine with a load of more than 300 kg (4 passengers). Although, basically, it all depends on the size of the engine and the mass of the car;
• warm up the engine for at least five minutes after starting it;
• if there is a turbine on the motor, do not stop the engine immediately after driving on high speed(and you need to work out for half a minute);
• after 2000 run, change the oil and filter;
• after running in, diagnose the entire engine (boost pressure, injection pump pressure, density, compression, smoke measurement, correct valve adjustment, tighten the block head nuts, etc.).

Because if you don't remove minor faults from the very beginning, then they can develop into serious problems. Do you always follow the recommendations when running in or immediately proceed to full exploitation your car?

Video: how to break in the engine

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You have made an overhaul of the engine of your car, and now you are faced with the task of correct operation during the lapping of new parts. In our article, we will tell you how to properly carry out this important process so that your engine can last as long as possible without breakdowns.

Lapping parts

Deviation from requirements proper break-in in a very short period of time, it can negate the overhaul of the engine, which is not a cheap pleasure. After the failed parts have been replaced in the engine (usually these are crankshaft liners, piston group rings, when boring the cylinder block - pistons, gears oil pump etc.), new ones must be adapted to their environment.

There is a grinding of the surfaces of friction pairs, and it is possible only on a running engine. The moment is indicative of the fact that in the engine oil appears a large number of smallest metal particles. These are roughnesses that are invisible to the ordinary eye, which were erased in friction pairs. Proper running-in allows these irregularities to be smoothed out and prevents friction pairs from quickly destroying each other.

As a result of proper running-in, the service life of rubbing parts is extended several times compared to those that have not been run-in.

Starting the Lapping Process

Proper running-in of the engine after overhaul begins with starting the engine and running it at idle. After 30-40 minutes, we strongly recommend changing oil filter on new.

After that, you can drive a car, strictly observing certain rules, which will be discussed below. As soon as the car passes the first 1000 km, we do a complete oil change in the engine. After another 1500-2000 km, the main break-in process can be considered completed, the oil and oil filter must be replaced with new ones.

Riding style

It is extremely important not to overload the engine after overhaul during the break-in.

Riding methods such as pull-in driving are contraindicated. With it, due to low revolutions, oil starvation engine, especially its upper part, where the camshaft is located. This increases wear and reduces the life of the engine. It is erroneous to think that "pull-in" driving saves fuel. There is no savings for the owner of such a nature of the ride.

Those who like to drive like this and have already done a major overhaul of the VAZ engine have become aware of the heavy wear of the fourth cylinder of the engine. Moreover, not only the piston wears out - the resource is also "eaten up" on the crankshaft. There is no point in talking about the camshaft at all - it is very difficult for him in these conditions. And if on Volga cars, driving "pull-in" does not have such catastrophic consequences, then such driving is contraindicated for the engine of cars of the VAZ family, and even more so when running in.

For the entire break-in period (2500-3000 km), you should have a calm driving style. The number of revolutions should not exceed 3 thousand. It is necessary to avoid lifting from steep slopes, slip in the mud and any other loads on the car - only a quiet ride.

When starting off, you should gently engage the clutch so that the load on the engine builds up smoothly, and not abruptly.

What should never be done when running

If your engine starts to overheat during break-in, do not turn it off under any circumstances. It is necessary to stop, turn on the interior heating to the maximum, turn off possible load(air conditioner), open the hood and achieve temperature equalization in this way.

After overhauling the engine and running it in, it is in no case recommended to tow another car, drive with a trailer, or overload your car. All these actions lead heavy loads on the engine, which means that they are unacceptable in any case.

It is also not recommended to use such a technique as engine braking during break-in. Of course, when emergency this rule can be ignored, but in normal operation, avoid this method of slowing down.

As you can see, running the engine after overhaul is, in fact, its logical conclusion.

Neglecting it important process will soon put you in front of the need to re-repair the engine.

Those who do not want to become a frequent visitor to car repair shops should follow all the requirements for a proper break-in.

Reliable and long operation of the engine after the overhaul will confirm that you did everything right.