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How to check the engine before buying. How to check the engine of the used machine

10.11.2020

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    Daltonism has several degrees. At extremely, the "red" person is perceived as "gray." And with a slight degree, called "color weakness", a person does not see only the shades of the "red" and "green". So he sees the "red" on the traffic lights in the same way as those who do not suffer daltonism.

    .
    @ Russian, the wine is excellent, but unfortunately only what remains in Georgia itself, that is, for its own use. For, really high-quality wine of the True Georgian brands there is produced in extremely limited quantities. Well, all that is intended for us, Russians with an average of sufficient is more produced under the brand of Minassali. And after all, it is characteristic of the Georgians themselves, the facts are recognized. Therefore, it is very sad, but in this country is now excellent and only the terry Russophobia is produced efficiently. Sorry...

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    Without the presence of sufficient grounds directly stipulated only by federal law, the inspector can only check the driver from sending an employee to a tour in Kathmandu !!!

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    Well, in the fact that Forester Subarovsky has maximum safety assessments even amazing nothing. This car has long been proven as reliable from all sides. And besides reliability, the forester has a lot of how to boast. Well, all who owned or own this car and so in the know.

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    cool, drove to the challenge and hooked with him) ride

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Engine - Home Detail in the car. This is the heart of the car, which, in fact, makes her go. The engine is expensive. Even contract engines on budget cars can do hundreds of thousand rubles, which sometimes exceeds the cost of the used car.

The price of the engine is at least 70 percent of the cost of the machine, so the engine check is the main action before buying a used machine. Check are performed in several ways, and you can learn not only about the state of the engine, but also its number. With the help of technique, it is easy to calculate even the real power of the aggregate.

There are a number of ways to check the engine by car before purchase, and today we will consider them in detail.

Independent check

The way for those who understand cars and can determine the state of the motor. If you start checking the engine of the machine yourself, then start from the opening of the car's hood.

When independent verification you need:

  • Inspect the engine itself for ledges, extraneous liquids and deformation of the housing from the impact. Already after that, the presence or absence of some common problems, such as damage from external influence (frontal impact) or oil heights. If the engine under the hood used car dusty and dirty, then you are lucky: the motor can not be seed on the oil and other fluids. Inspect the engine on the subject of heights in the bright time of the day and with a flashlight, in other words, with the maximum illumination of the subcontrol space. If the engine is recently washed, then about the leaks of oil remains only to ask the question, counting on the fair of the seller, otherwise such a defect will be able to determine over time after buying a car, and this will become an unpleasant surprise.

  • While you are near the engineered machine, you can check the engine of the car engine. It should work smoothly, without sound drops and not making the sound louder or quieter without pressing the pedal. It is worth remembering that the sound of the diesel engine is different from the sound of the operation of gasoline - he "tauralitis" as a tractor, while the gasoline engine works in one tonality. There is also a sound of the operation of opposite engines, which are found on some sports cars, for example, on the entire line of Subaru - these motors are "growling" even at idle.
  • Ride by car. In fact, the only way to see the motor "in the case", the ability to independently estimate the power and responses to the pedal, to understand whether everything works as needed and, and whether the car does not lose in power, there is no "failures" when driving and so on.
  • Inspect the inconsistent space and find out if there was no windshield machine. If you can see that the front of the car was restored after a strong accident, it is worth considering that this can affect the operation of the engine in the future.
  • Connect the diagnostic wire - if you have such an equipment, you can read the login logs of the on-board computer and find out for sure which the engine has the engine. But be careful - sometimes unfair sellers using technology erase errors from the computer's memory.

If you have a diagnostic wire, and you check not too old a foreign car, then connect the laptop through it and consider the errors fixed by the on-board computer. In modern cars, the computer reads errors and retain them in a log, which can always be viewed using the appropriate equipment, simple and inexpensive: only the Wire OBD, laptop and software under your car brand are needed.

If you are not lucky, and you came across the "killed" car, then the computer will give a bunch of errors, among which there may be errors in the engine. Next, you simply match the error numbers with the database and get information that it is not so, and the different defects can be a huge set: from a malfunction of the engine pillows, leading to vibrations in the cabin, before skipping the ignition coils or scale in the cylinders.

Check in auto service

The right way to learn everything about the car and its engine, if you do not consider yourself a good expert for self-inspection. Specialists of services for a reasonable fee will examine the car completely, consider it a computer (if the car has a diagnostic connector), will check all the technical components of the machines and even find out if there were interference in the memory of the onboard computer, whether the mileage was twisted through it and errors were drilled.

Contact better or to official dealers, or specialized centers that work with one brand of cars, or with a narrow circle of automotive brands. As a rule, all typical "sores" of cars are better known in such services and are very well versed in the engines presented on the models of the brand.

In this case, you only need to choose a service that has a large number of positive feedback and a long history of work, pay for service services and wait for the end of the diagnosis, after which you will be given an order-outfit for work. Acquire the car after that and pay for parts and repair, or give the document to the seller and refuse to buy a car, the case is already yours. This method of checking the engine of the car is very effective and, as a rule, errorless - if the car is defective or requires significant investments, the specialists will report this on the results of diagnostics.

Pluses of access to the car service:

    • You will know for sure all the remote car and its nodes: you will tell you whether the mileage of the car was twisted, whether the accident was that it was necessary to replace or repair at the moment time, etc.
    • In place they will be given an order-outfit, prompt where to purchase spare parts and consumables. In the event that you purchase a car right in place, you can start working to eliminate the problems, without leaving anywhere.

Cons work with car dealership:

    • It is necessary to pay for the services of a specialized service, prices range depending on the region and the qualifications of the servicemen. On average, for services specializing in foreign cars, one Normochas is estimated from 900 to 2000 rubles, the diagnosis lasts an hour and a half, these costs the potential buyer takes over.
    • You will have to spend time on the road to the service, the diagnosis of the car and after - the road home, you also need to coordinate the time convenient for all sides: you, the seller and car service. In view of the complexity of the organization, the process can delay on weeks.
    • In case you choose an inexpensive "garages" service, there is a risk that the diagnosis will not be able to spend efficiently that after buying a car will turn out for you in additional costs.

If you have a sufficient number of time and are ready to spend several thousand rubles to accurately avoid mistakes, then the service is your option. But be careful when choosing the service itself, save here is not the best way, it is better to spend more money for the services of high-level specialists.

The service came into use recently, but managed to spread and draw a wide number of specialists. Today, anyone can order a car check with the departure to the house, it is practically the same that the car service, only experts come to you, and not you.

As a rule, automotive experts operating or craftsmen are conducted by car service, or car service specialists with mileage. They will determine the condition of the car hung with the eye, they will diagnose through the on-board computer and will definitely tell you that survived this car in the past, and what should be feared in the future.

The advantage compared to the service is that you will not need to go anywhere, and check will be carried out faster, but the weak side of the exit specialists remains the absence of complex equipment present in car services, such as the lift. However, if there is a garage with the pit, this problem is leveled.

    • Experts will come to you with a set of necessary equipment and will examine the car. Work takes 40 minutes to one hour.
    • As a rule, experts of field diagnostics conducted a similar procedure for many times, and hung quickly and accurately determine what it is not so with the car. The quality of diagnostics and the "verdict" of exit experts is usually very accurate.
    • Experts on the selection of cars are also traded with the seller for you, and you can well "knock down" the price of the car you are interested in in good condition. Despite the fact that the price of such services is high, usually it is smaller than the amount on which the car pickles can be sacred, and as a result, everyone remains.
    • The absence of some professional techniques present in the car service.
    • The risk to face amateurs that will incorrectly appreciate the condition of the car.

How to check the power of the car engine

If you acquire a powerful car with a large number of "horses", you will certainly know how much the engine has lost its potential over the years.

For such an inspection, it is necessary to drive the car to the power stand, a special apparatus, on which the engine is subjected to maximum load and find out how many horsepower and torque in the unit in reality.

Over the years, cars lose their former properties, the engines are weakening and losing in horsepower, and only with the help of the power stand can be found out how many of them are left, and after deciding whether it is worth buying a car, over time he has lost their forces.

It doesn't matter whether you check the car yourself or take it to the service, you can always learn about the engine engine most basic thanks to the Avtocode online service. In a free report on the results of the check, the type of engine will be specified, its power and volume, so you can count the tax on this car in advance and estimate the fuel consumption.

Having ordered a full report for 349 rubles, you will learn the entire history of the car: real mileage, the presence of the restrictions of the traffic police, customs history, the history of fines, information about OSAGO and those. Inspection and more.

Before buying a car, with checking its technical condition or without, always better to have a report on it. With it, you can avoid significant losses and do not encounter a deception from the car seller.

If after receiving the report you do not have the opportunity to go to the inspection, use the on-site check. The wizard will come to the place and will diagnose the car with the help of special devices. Just order an autocoder's field check and be sure of your purchase.

The natural desire of each car owner who acquires a used car is the purchase of a technically serviceable car, which will subsequently will not require any unforeseen expenditures on the restoration of technology. That is why when choosing a car, you must check the engine, which will allow subsequently to avoid the cost of repairing the force aggregate. Tell in more detail how to check the car engine before buying.

The mistake of many customers used cars is the choice of the car solely on the basis of its appearance and body state. As a result, such a car can affect the excellent body and restored fresh salon, but it has hidden engine defects, which leads to a significant cost of the car owner to restore the motor.

Engine and gearbox are one of the most complex and expensive nodes of any car. And it is precisely on them during operation there is an increased load, which leads to various kinds of breakdowns and faults. Engine repair represents great difficulties, respectively, even with conventional breakdowns, it is necessary to open the engine and replace expensive parts, which leads to significant costs from the car owner.

That is why it is necessary to carry out the appropriate engine check before purchasing a car. You can perform such an inspection as independently in the presence of appropriate experience, and contacting the workshop, where specialists using the appropriate computer equipment for diagnostics will perform the engine survey and reveal the motor failure.



The easiest way to perform such an engine check in modern cars, where numerous sensors are installed, according to which the technical condition of the power unit is determined. Such diagnostics is best done in brand service, where there is a corresponding equipment. All you need to do is connect the engine to a computer, and subsequently read all the testimony from the sensors.

Such a check allows you to get all the necessary information regarding the engine status. Conducted computer diagnostics will show compression, indications from lambda probe sensors, nozzle skipping, fuel combustion degree, and so on. And yet we note that even in this way, with the most detailed computer diagnostics, the engine is completely impossible. Therefore, it will be impossible to give you one hundred percent guarantees of the engine operation. However, this method of checking the motor is one of the most accurate, so when buying a used car, we recommend that you need to go to such a service and carry out the appropriate engine surveys and other knots of your car.



There is also an independent inspection and diagnostics of the engine of the car when buying a used machine. Immediately, we note that such an independent diagnostics can be performed only if you are well versed in the machine device, which will correctly determine the technical condition of the motor, rightly picking the car.

First of all, the visual inspection of the engines and the entire boobspace space is performed. It is necessary to pay attention to the presence of oil trails, which indicates possible problems with the gasket or with the valve cover geometry. When inspecting the engine, the perfect cleanliness of the boost space should also alert the potential buyer. What the car was so washed, and did the seller wanted to hide the presence of pronounced oils in the boilers.

Oil condition can be checked by opening the filler tube. The inner tube should not have dirt and plaque. Black deposits on the traffic jam can say that the car owner neglects the service requirements, which led to a caxing of oil, respectively, such deposits will not only on the lid of the filler neck, but also inside the engine itself. If you have seen on the lid of the foam foam foam foam cover, this suggests that antifreeze falls into the engine and further checking such a motor does not have any meaning.

It will not be superfluous to unscrew and inspect the spark plugs. In the event that there are traces of oil on candles, it testifies to the wear of the piston rings, so they will soon need to be replaced.

After completing the visual inspection, you can start the engine and check the operating motor already. First of all, you will need to analyze the luggage and the color of the exhaust. The exhaust on a good motor should be transparent, without a pronounced SIZAL Tint. If white smoke or steam comes from the exhaust pipe, this indicates problems with the tightness of the cooling shirt or the burned strip. And the appearance of a pronounced SIZAL shade of smoke from the exhaust pipe indicates a fitting of the engine oil.

It will be necessary to ask the owner to quickly pay off on the engineered engine, and you should listen to the operation of the motor. There should be no detonation, choking and shooting. But if there is a pronounced tremor or other problems in the operation of the motor appear, this may indicate a malfunction of high-voltage coils or problems with nozzles.



We carry out a test drive when buying

Choosing a used car, you should spend the most detailed trial check in, including to check the engine. It is necessary to evaluate the car dynamics, the lack of power failures and any extraneous sounds during acceleration and movement at constant speed. It is necessary to carry out such a test drive when open and closed window, which will allow you to hear all the outside sounds and stuffs in the engine. Only by spending such detailed diagnostics can be made to make a decision to buy a new machine.

Conclusion

Qualitative and most detailed checks and diagnostics of the engine of the car when buying will allow you to avoid any difficulties with a power unit, and you will be delivered from the unforeseen costs of repairing the car. You can perform such diagnostics, both on specialized services, which uses the corresponding computer equipment for diagnostics, and independently, by detailed engine inspection, which will help you to identify the existing malfunctions and make a right decision on the feasibility of purchase.

The solution to buy a car with a diesel engine in diesel fuel involves the reasons for which this option is selected. Reasons determine the degree and main parameters of the engine check before purchase. But the question is how to check the diesel engine when buying is the main one.

Selecting diesel engine

Before coming to the salon, an understanding of the main characteristics that the engine of the car was purchased would have. Universal diesel engines do not happen, so desires should be linked to the complex. There can be no engine powerful and non-eating oil, reliable and comparable cheap in service.

Powerful motors have a large resource, reliable, but not so economical, like low-power engines, which are less reliable and with a smaller resource.

More reliable engines without turbines, but turbocharged diesel engines have better performance characteristics with less efficiency.

By choosing the engine that suits the buyer in its indicators, you should understand the method of testing a dieselger. The engine, ultimately, determines the fate of the car being purchased.

Diesel inspection technique in the process of buying a car

Choosing a pre-car with a suicide desires, diesel should begin to explore the engine.

When buying a new car, the test technique is simpler and consists of parts of the general technique for a used car.

The check is better to split down the steps.

  1. At this step, it is necessary to inspect a diesel engine to the presence of fluid flutters characteristic to overheat the engine. Better if the flocks will be absent on the glands and in other check-in places.
  2. It is necessary to remove the nozzle to which the air filter with the intake manifold is connected, and if the diesel engine is turbocharged, then with a turbine. If traces of oil are detected in the nozzle, it is possible to wear, which is significant to the cylindrophone group or at best, the air filter is strongly dirty.
  3. Diesel should be launched and if it does not start the first time, then a hidden defect is possible. Repeat the engine launches through different intervals, not a touch of gas pedal:
    • Run is normal, then at idle it is necessary to watch exhaust gases. A small emission of smoke is allowed at the first start of the motor, but further it should not be present in the exhaust gases.
    • A quiet tapping with a diesel engine is permissible, the remaining sounds must be acceptable.
    • At idle it is necessary to increase the speed up to 3000-4000 per minute, jerking and vibrations are not allowed. The exhaust color should not be SIZE, otherwise the ignition is exposed later, the other inaccuracies of the assembly settings.
    • If at idle turns sharply and at high speed, a nasional exhaust and vibration appeared, then there will be a power loss in these modes.
    • If the exhaust is black, the engine is knocking, then you should not further be interested in such a machine.

Check engine compression and other parameters

Sometimes in addition to the technique, presented above, it is desirable to check some parameters of the engine express methods that do not claim to absolute accuracy. Sometimes these methods give useful results.

Check engine compression is preferably a special device. The diesel engine is permissible value of 36 atmospheres, at least 31 and scattering pressure on cylinders in the limit of two atmospheres.

If there is no instrument, it is possible to assess the compression, at least on the "eye". It is necessary to turn on the engine, remove the chicken cap neatly and just put it on the neck. If the gases are discarded the cover, compression is apparently not normal. Qualitative diagnostics produce only a hundred specialists.

If you have a motor, the radiator is filled with antifreeze normally, wait for the discovery of the thermostat and watch or no air bubbles in the neck of the radiator on the engine running. The appearance of bubbles indicate damage in the cylinder block.

The state of some diesel aggregates can be approximately evaluated when an operating engine is inspected by car.

To determine the state of the piston system, it is necessary to increase the revolutions to 3,000 to 5 seconds in a preheated unit, if the exhaust pipe does not smoke, then dramatically raise up to 4,200 revolutions and keep 3 seconds. If there is no smoke, the piston system and the turbine work normally.

But if there is smoke, there will be an increased oil consumption. The more black smoke, the less traction characteristics.

Verification of the pump pump is reduced to definition of the ability, starts up the engine, if the voltage starts, the pump is faulty.

The engine tested by the above methods should be considered conditionally passed testing, careful check is possible only in the service organization.

To the question of how to check the diesel engine when buying a car with a maximum fullness, the answer is simple - you need to contact the service center.

Conclusion

Testing in real road conditions is the best testing of diesel, so buying the car must be tested on the go before making a final decision.

At various speed modes, diesel can show itself in different ways, because these engines do not like high revolutions. The choice of optimal speed for the engine is important from the point of view of fuel consumption, oil and wear of the aggregates.

Therefore, to choose a diesel engine, it is necessary to treat thoroughly, thinking how to use it.

september 21, 2017

By purchasing a car with mileage, it is necessary to take a very checkered for its assessment before purchasing at the inspection phase. The main feature of the used car is that the former owner does not carry any warranty obligations to the buyer. Therefore, it is recommended at the stage preceding the acquisition of the car, to reveal all possible disadvantages as much as possible so that they do not give to know about themselves at the moment when it will be your property.

As a rule, the first thing the buyer studies how the car looks outwardly, on the subject of tinted, dents, chips, scratches, etc. But without a well-working engine, a beautiful body of special value is not at all. So, it is necessary to look under the hood of the car being purchased.

CONTENT

How to check the engine when buying a car

Remember!

The very first and, perhaps, the main thing is not a word that you are weakly meaning in car engines.

You need to say nothing at all and with a smart face mysteriously keep silence, or to prevent a guy motorist, which in his century did so many engines that he can already design breakthrough innovations with tied eyes.

Speak measured, clearly, be calm. Never express joy if you heard something expected. You need to wear a so-called unperturbed mask, absolutely without emotions.

Analyze all seller's responses. If he begins to "pour water" or to blame from the answer, it means that it is clear something wrong, and in the past there is some kind of "sinning" regarding this car. Pay attention to the seller's reaction when you examine the machine you. Lee allows him to look everywhere where you are pleased, or on some places trying to distract you and translate to another topic.

What you need to look in the engine

For inspection of the power unit of the acquired car, you will need: - Work gloves; - pure rag; - White list. So, proceed to the inspection.

1. External inspection

Open the car hood and look around the entire motor compartment. Look for oil spots and waste - these are the first signs of engine malfunction.

Even small signs in the future can turn into big challenges associated with oil leakage.

Especially pay attention to the areas around the gas station and the ignition distributor. The causes of the fluthers can be hidden in the protected gaskets, rubber seals and loosely adjacent clamps on the hoses.

The next reason for oil flips is a poorly adjacent cylinder head cover. Well inspect the place of the junction and make sure it is clean from the oil and sealant. Even if the seller brought the engine in advance to normal, it still might miss something.

Feel free to expose! For example, testing the engine malfunction can traces on the hood from the inside, inspect it more closely. If scratches are visible on bolts and nuts, even minor, it means that the motor has already opened anyone, and this is clearly not good. But it's good if you were notified that the engine was scheduled for recently.

2. Check the condition of motor oil and antifreeze

Oil Check the dipstick, toosol - just reloading the lid of the expansion tank or radiator.

The oil should be transparent, without visible impurities and shallow shavings, not too viscous and not to have incomprehensible smells. At the diploma should not be either outsider or divorces. Bubbles in oil - the first sign of leakage, and this is a very serious problem.

In the case of coolant, the air appearance in it means that it is dried directly into the engine. And the reasons for this are two: either the gasket was tested, or the block head cracked, and this is completely unacceptable.

Remember!

Tosol is a caustic liquid and can damage piston rings, which will later cause irreparable damage to the entire engine.

3. Cover of the oil refining neck

Inspect the lid outside and inside. Under it or on the throat should not be foam or white climb. The presence of the latter clearly signals that Tosol got into the engine. And what will happen in the future with the engine, we have already spoken in the second paragraph.

4. Candles and rubber elements

  • Hoses and seals should not be damaged, even small cracks are unacceptable.
  • If under the hood dirty and dust, wear gloves, do not be lazy, and with the help of a cloth, wipe all the nodes and inspect them. Soased smoking can hide many defects.
  • If you can, unscrew the couple of candles, you can learn a lot by their appearance.
  • If they are in order, then they will have a thin layer of light grayish or yellowish raid.
  • Permissible light wear of the electrode.
  • If a crack appeared on the surface at least one candle, then the engine will work with a knock.
  • If there were abundant light sediments on candles - the oil is chosen incorrectly.
  • If the central spark plug electrode was melted, it may indicate many problems, ranging from early ignition and low-quality fuel to problems with valves and ignition distributor.
  • The formation of solid sticking, according to the type of glaze, which consists of soot, or strong wear of the electrodes mean that the oil used or fuel has been with numerous additives.
  • Ground spark plugs serve as an indicator of excess oil in a lubricant system and serious wear of piston rings, cylinders and guide valves. Nagar is reading about the poor formation of an air-fuel mixture or a clogged air filter that requires replacement.

Engine check in

1. Run the motor and jam a little on the spot

The starter at startup should not groke and publish other extraneous sounds. The engine must start with the first attempt, despite the fact that he is warm and what weather conditions "overboard". It should work without interruption, absolutely smooth. If the motor began to pull, extraneous vibrations are observed, the rhythm is knocked down, the conclusion is one - the troit engine. So, some of the cylinders stopped working. The reason may be hidden in a faulty ignition system, poor operation of some of the candles, re-entered the fuel mixture or a rotten piston. In any case, discuss this problem with the seller. Count how much repair it will cost, and knock a couple of times more for the car.

2. Check the instrument readings

With a warm engine running, the arrow of temperature sensors and oil pressure should be within the normal range, ideally - in the middle position.

3. What smoke goes from the exhaust?

If, when the power unit is started from the pipe, it went abundant white smoke, but soon completely disappeared, then it is not necessary to worry at all: it is most likely simple condensate. If smoke never ceases to leave the pipe, then by smell and color you can quickly diagnose the problem.

If smoke is white Or has a slight squint, which is quickly dissipated in the air, leaving a sweet odor, is that there is Tosol in the car motor cylinders.

Clear blue or gray smokewhich can also have a whitish shade hanging on a light lilac or gray haze in the air means that oil seeps oil into the combustion chamber.

If the car "shines" with such surprises, it is better not to risk closing your eyes, for the repair can do it very expensive.

And finally black smoke Signals that the air-fuel mixture burns inefficiently. The reasons for that are several faults: air jackets, depressurization of nozzles, malfunction in the lambda probe and air flow sensor. The consequences in this case are such that the engine is worn much faster, and the toxicity of the exhaust becomes beyond.

4. Test drive

If all of the above testing you liked the car passed with a bang, then it remains only to ride it.

The first error, which is carried out by buyers used cars at this stage, is a short test drive. Often they are limited to a short trip around the bazaar, but this is not enough to understand in full, what car rolls.

If the car engine has surpassed all your expectations on a short distance, ask the seller to drive a few more kilometers. Agree that you compensate for consumption and temporary costs. It is better to check it right now, the later token on the faults not identified in time, breaking his head over the question, where to find a good motorist cheaper.

Focus on the sound of the motor, Do not turn on the music and everything that can drown it.

  • Listen to the engine with open and closed windows,
  • spoke, experiment with sharp accelerations and watch the behavior of the car.
  • Spoke up to 100 km / h or more, if you allow the rules of the road, and spin, there are no vibrations and jerks, as the engine sounds, does not publish outside noise, knocks and other irritating and abnormal.

5. Repeat diagnostics of the motor

Upon completion of the test test drive, look again under the hood and check if it did not appear and everything remained as it was before arrival.

If, after the trip you were embarrassed, a certain hint of the leaning, but the engine at the same time clean and good looks, most likely, it's just the move of the owner to sell the car faster - he washed the motor.

But if other items do not embarrass you, then this place of facing oil is nothing terrible, and for a small discount you can safely buy a car.

If the engine drove during the passage, as an unbridled stallion, and after spoiled the mass of oil flips, then give up the purchase of such a car. Pay for the cost of gasoline and continue to search, because this car is not for you. This car will acquire the one who loves to repair, and not ride.

And summarize. If you are not enough of all of the foregoing, or you doubt your abilities and opportunities, take a person dismantled or go to the service station and order a comprehensive engine check. Thus, you will protect yourself and minimize the likelihood of buying a car with a "driving engine."