There is a misconception among some motorists that excess amount oil cannot interfere with engine operation. It is not always clear to novice car owners what will happen if oil is poured into. Too much a large number of lubricant has a negative impact on the operation of both the power unit and the whole car as a whole. The purpose of this article is to explain what such violations lead to and how to prevent them. possible consequences overflowing oil into the engine.
How does the quality of engine oil change when overfilled
Engine Operation Rules internal combustion provides for constant lubrication of working parts and assemblies subject to increased loads and friction. For these purposes, a lubrication system is included in the design of the power unit. As working fluid engine oil with specified technical characteristics acts.
If the amount of lubricant exceeds the calculated level, the technical and performance characteristics injectors will gradually change to the worst side. During engine operation, chemical composition And general condition oils will undergo irreversible changes:
- supersaturation with soot particles;
- wear products;
- the oxidation process will begin;
- the oil will completely change its consistency and color;
- there will be a smell of burnt grease.
What to expect if you pour oil into the engine above the level
Depending on the characteristics of the motor device, a certain amount of lubricant is poured into the crankcase. In order to maintain the required volume, it is provided special system level control engine oil in the engine.
If oil is found in the engine above the level, what threatens such a violation? It is known that as the temperature rises, liquids expand in volume. Engine oil floods the spark plugs, making it difficult to start the engine. An increased oil level in the engine leads to a decrease in power characteristics, as well as an increase in fuel consumption.
Overflowing oil into the engine is fraught with the following consequences:
- Leaks, oil leaks.
- Violation of the tightness of the joints.
- Increasing pressure in the lubrication system.
- Deformation, rupture of sealing elements (gaskets, seals, etc.).
- Oil foaming.
- Accelerated oil filter wear.
- An increase in the amount of carbon deposits on the surfaces of working units and parts.
- The car starts to smoke, the degree of toxicity of exhaust gases increases.
- Difficulty starting the engine.
- Premature failure oil pump, spark plugs, etc.
Excess lubricant during combustion forms a layer of soot, which hardens (sinters) under the influence of ultra-high temperatures during engine operation. What threatens to overflow oil into the engine for components and parts:
- harmful accumulations are formed on the surfaces of pistons, combustion chambers;
- clog the muffler, disable it;
- lead to disrepair of oil seals, spark plugs.
What to do if oil is poured into the engine
If as a result of checking the level lubricating fluid an overflow is detected, it is not recommended to start moving until this violation is eliminated. To get rid of excess engine oil in the engine, you can use one of two methods:
- liquid suction with an elastic tube;
- removal excess lubrication through drain plug(crankcase drain method);
- getting help from a repair shop.
Removing oil with a syringe
The first way is the simplest solution. Before the immediate procedure, it is necessary to start the engine for several minutes so that the lubricant warms up and acquires sufficient fluidity. The main condition is not to bring the oil to a boil.
- Unscrew the filler cap.
- Dip one end of the tube into it (it is allowed to use a silicone medical tube for blood transfusion).
- Connect the other side of the hose to a large syringe of maximum volume.
- Draw out the lubricant using the plunger of the syringe.
- Disconnect the syringe from the tube and release the oil into the prepared container.
- Repeat the procedure several times until the lubricant level reaches the set mark.
With the help of a syringe, you can get rid of excess oily liquid that got into the tank by negligence. Flaw this method is the duration of the process.
Method for draining excess oil
If the oil begins to foam, bubbles appear, the previous method is not suitable. Wherein excess oil removed in a different way. First of all, you need to make sure that the engine cools down properly after work. The machine is then installed over viewing hole or on a horizontal overpass platform. The order of further actions:
- substitute a clean basin under the drain plug located on the crankcase;
- unscrew filler plug, and then drain;
- when it merges enough oil, quickly plug the drain hole with a plug;
- check the level with the dipstick and, if necessary, add the missing amount of fluid directly from the bowl.
This method is also not without drawbacks: oil losses are observed here, the work is not distinguished by its economy and cleanliness.
Tip: In order not to create unnecessary trouble for yourself in removing excess working fluid, it is recommended that you carefully observe established rules when changing the oil in an internal combustion engine.
The main causes of oil overflow into the engine
Often, car owners do not pay attention to the excess amount of lubricant in the motor. Negative impacts may not affect immediately, in the early stages they are almost invisible.
What can cause overflow:
- When changing engine oil, it is not always possible to completely get rid of the old material. This is due to insufficient heating of the oil. At the same time, 250 - 500 ml remains. To drain the mining in full, it is recommended to use special vacuum equipment.
- Some motorists deliberately fill in liquid with a margin. They mistakenly believe that oil starvation- this is bad, then pouring a little more never hurts. I poured oil into the engine 1 cm more and it's okay, with active use it will be spent on waste and leaks.
Signs of oil overflow
To determine the actual amount of working fluid in the motor, you need to use special device- oil dipstick. Checking the engine oil level in the engine is carried out when the machine is standing on a flat horizontal platform. For a more accurate measurement, it is recommended to wait at least 30 minutes until the warm oil has completely drained into the sump. Normal is the level on the dipstick between the Min and Max marks. If the result is higher than the allowed maximum value, the conclusion is obvious - there is an overflow.
Increased fuel consumption for no apparent reason also indicates overflow. The increased amount of oil creates additional loads when the pistons move inside the cylinders. The crankshaft transmits a reduced undercarriage vehicle. The driver notices that the car accelerates worse, reacts less when gas is added, at the same time, fuel consumption is noticeably increased.
Reasons for increasing the volume of oil in the engine without overflow
The volume of engine oil can be increased not only due to overflow, but also when it penetrates into lubrication system fuel or antifreeze. In case of violation of the tightness of the cylinder head gasket, cylinder block, wear of rings, etc., liquid formulations from other systems dissolve in the lubricant, increasing its volume. In this case, it is urgent to carry out computer diagnostics power unit.
Experienced drivers independently check the condition of the oil by external signs:
- the lubricant becomes more liquid;
- when mixed with other liquids, the oil becomes like an emulsion;
- an extraneous smell of gasoline or antifreeze is added;
- lubricating properties are lost.
Foaming oil indicates the presence of coolant in its composition. At the same time, white smoke begins to fall from the exhaust pipe.
If gasoline enters the lubrication system, specifications engine oil are sharply reduced. In the operation of the car, non-standard sound effects appear. Further operation of the vehicle with diluted engine oil can lead to failure of the most important working elements of the power unit. As a result, an expensive overhaul with the replacement of broken components and parts will be required.
For a warning negative consequences it is necessary to identify the place and cause of the occurrence of this defect and eliminate it in a timely manner. A prerequisite continued operation of the engine is also complete replacement engine oil with pre-flushing of the lubrication system.
Tip: Overfilling the lubricant in the motor is as serious a violation as underfilling it. For a warning serious damage internal combustion engine, it is recommended to regularly check the level and composition of engine oil by wrinkling the dipstick.
The oil in the engine ensures the correct functioning of the components of the internal combustion engine, as well as the smooth interaction between them through friction. Based on this, it must be ensured that the oil level is within the prescribed values (min/max). Underfilling is dangerous for the internal combustion engine. Although, if oil was poured into the engine, this also does not bode well. But first things first.
Below minimum/above maximum
If the level has dropped below the “MIN” mark, further operation of the car is strongly not recommended. Otherwise, the consequences can be the saddest - the engine runs the risk of catching a "wedge", which is fraught with costly overhaul. The most innocuous thing that can be in this case - increased wear engine parts.
Overflow is also not recommended. Although this is often overlooked, mistakenly believing that an increased oil level is even beneficial due to the reduction in frictional forces. In fact, overflow provokes foaming lubricants, which adversely affects the performance of the lubrication system. If the owner (mechanic) poured oil into the engine, then in the future the consequences may be as follows:
- increased risk of soot formation in ICE cylinders: on pistons, cylindrical walls;
- excessive emission of MM (engine oil) through the exhaust system line. As a result, the formation of plaque on the walls of the muffler, clogging catalytic converter and so on. In other words, the resource of the exhaust system is reduced.
- increase in exhaust gas emissions: deterioration of the environmental performance of internal combustion engines (a consequence of the previous paragraph);
- increase in fuel consumption;
- an increase in the consumption of the MM itself due to possible leakage from the engine with existing depressurized areas (example: cylinder head gasket);
- seal wear due to dropped pressure, as a result of foaming (overflow);
- the spark plugs are flooded. If MM is constantly present on the candles, they last less, work worse, which makes it difficult to start the engine and negatively affects its operation.
Exceeding the "MAX" mark: reasons
Further actions
What should the owner do if he poured oil in the engine?
Such a problem as overflow is solved in several ways.
As soon as we become the owner of a car, they begin to frighten us from all sides, that without scheduled replacement oil our car will not last long. We are also told to constantly check the oil level in the engine. And God forbid the level will be at a minimum or below it. And this is logical, because at a low oil level the engine may experience.
But in most cases, they really focus our attention, somehow forgetting about the “MAX” mark on the probe. After all, sometimes oil can be poured into the engine. But what threatens such an extra increase in oil level? Let's figure it out.
So, what happens if, for some reason, the engine is more oil? Firstly, it all depends on how much oil got into the oil pan. Secondly, the design of the engine will also play an important role.
Most engine designs allow for a small overflow of oil that will not cause any damage or consequences. However, if you fill in too much excess oil, then it is better in this case not to start the engine, but to eliminate the overflow.
Modern engines have forced lubrication due to. Oil circulates in the engine by means of an oil pump. The amount of engine oil is optimized after doing some calculations and analysis at the design stage, taking into account the size of the engine, the number of bearings it should lubricate, etc.
Part of the powertrain design process is when engineers decide how fast and how much pressure the oil needs to circulate through the engine in order to perform multiple functions in one cycle, such as lubrication, surface cleaning, and heat transfer from overheated rotating and sliding surfaces.
Naturally, it is at the time of design that the issue of the approval of engine oils that are most suitable for use in the engine being developed is immediately decided. After all, the oil should not burn, absorbing heat from heated engine parts. Otherwise, it will just burn out.
Engine oil is stored under the crankshaft in a container (pan) called the oil pan. The tray is designed to store maximum amount required by the engine oil, while preventing oil from entering the rotating parts of the crankshaft and allowing only a small part of the oil to be sucked up by the oil pump.
Moreover, the mesh oil receiver must always be immersed in oil so as not to lead to air being sucked in.
The ingress of air into the lubrication system will adversely affect engine parts - oil radiator, oil filter, bearings.
In this way, the minimum oil level is always ensured on the oil sump in all processes. This is achieved by the design of the pallet and, of course, necessary quantity oils.
If poured (above maximum level marked on the probe as "MAX"), the thermal load increases. The fact is that the oil pan acts as a receiver to absorb the heat energy received by the oil from the heated parts of the engine. As a result, if there is more oil on the surface of the oil pan than expected, it has to process large quantity oils for heat dissipation.
Also, the more hours the engine runs, the more fuel is burned. Accordingly, more heat is transferred to the oil, which must be cooled according to the automaker's specification.
As we have already said, in the immediate vicinity of oil pan(above the surface of the oil) is crankshaft which does not interact with oil. But depending on the excess oil in the sump, there is a risk that grease will get on the crankshaft. No, if you, of course, pour a little oil, nothing bad will happen, since the gap between the crankshaft and the oil level in the sump is sufficient so that the crankshaft does not scoop up grease. Typically this gap is 1.25 to 1.5 inches (3.17 to 3.81 cm).
In addition, in the event of an overflow, it will be forced to process a larger amount of lubricant than was provided by the automaker (or filter manufacturer). As a result, the oil filter will become unusable faster (the interval between maintenance is reduced).
Also, if oil begins to hit the crankshaft heavily, pressure will accumulate in the crankcase, which may affect the operation of gaskets and seals. As a result, the seals will no longer ensure the tightness of the engine, which will lead to leakage of lubricant.
Including oil on hot surfaces can lead to the formation of oil mist. True, it is worth noting that the formation of oil mist is a natural process in the engine. But if the engine is overfilled with oil, an excessive amount of oil mist will form.
Recall that the engines are equipped with a crankcase ventilation system, which is necessary to separate from the oil gases that are formed during the combustion of fuel in the combustion chamber and seep together into the crankcase, mixing with engine oil.
When the engine is new, the system works properly. But over time, this system begins to work less efficiently. If oil is overfilled in a new engine, the boat ventilation system will also work inefficiently (just like in a motor with high mileage). As a result, the crankcase ventilation system will separate the oil from crankcase gases not properly.
If the engine is equipped with a crankcase venting system, then oil overflow will cause more pollution of the atmosphere.
If the engine uses a closed crankcase ventilation system (returning crankcase gases to intake manifold engine) in which the oil filter is involved, oil overflow and the formation of excessive oil mist will lead to premature contamination of the filter.
But the worst thing is that the percentage of oil mist in the engine will increase significantly. As a result, oil mist drops can fall into intake system. This will affect the operation of the intake system components such as turbocharger pipes, intercooler, etc.
If it's about diesel engine, overfilling the oil will cause soot to build up after the oil mist mixes with the EGR valve in the intake system and then black smoke in the intake system. exhaust system as the oil drops will burn.
Also, excess oil will affect the valve seats by accumulating soot on the valves.
In the worst case, oil can enter the exhaust system, causing damage. And, of course, because of the overflow, you, in fact, spend extra money on oil.
In general, taking into account the above arguments, it is recommended to fill the engine with oil to the maximum level (up to the “MAX” mark on the dipstick).
But do not be afraid of a small overflow. With a slight excess of oil in the engine, nothing will happen, since automakers, when designing the power unit, foresaw the possibility of a small overflow, leaving a sufficient gap between the oil poured into the engine to the “MAX” mark and the crankshaft.
After the next visit to the service station or oil change on your own many motorists notice on the dipstick that the oil is poured above the maximum mark. The only good thing about this situation is that it was discovered. Overflow of oil in the engine should be eliminated immediately. If this is found at the service station, demand that the level be brought back to normal. Masters may say that the selected oil will have to be thrown away, but even if you have Shell Helix Ultra oil in your engine, do not regret it, the consequences of overfilling can be very serious and half a glass of spilled oil will seem like a mere trifle compared to what can happen.
The amount of oil in the crankcase is calculated in such a way that during rotation the crankshaft does not dip into the oil with counterweights. Its rotation speed is decent and the oil will foam on impact. All components of the oil are designed to work under certain conditions. How they behave in gas-oil foam, not a single theorist from oil developers can predict. Therefore, if you bought a good synthetic motor oil, for example Shell Helix Diesel and expect that the components and additives that are present in it will help the diesel engine to work for a long time and trouble-free, then in the event of an overflow, this calculation is incorrect.
Sometimes oil overflow in the engine appears simply and clearly. There is a loss of power, the candles are splashed with oil. This means that in best case oil has entered the air stream air filter, and then into the carburetor and into the cylinders, and in the worst case, the oil enters from below, oil scraper rings do not cope and lay down. Here you will have to tinker. For modern injection engines the danger of overfilling is also associated with the ingress of oil, for example, on the regulator idle move. Incorrect operation of this device will not allow the engine to work correctly. Big renovation may follow due to the fact that due to high blood pressure can squeeze out the crankshaft seals. Their replacement is a troublesome and not fast procedure.
It's obvious that oil overflow in the engine must be removed immediately, you can not ride with him. To do this is quite simple.
Method one, hassle-free. Stop by a service station, pay some money, after completing the procedure, check the oil level.
The second method is quick but dirty. Drive onto a flyover or a pit. Let the engine cool down, and then loosen and unscrew the drain plug a little. After draining a small amount of oil, tighten the plug and check the level.
The third method is neat, but requires some equipment. Prepare the equipment - insert a syringe of 50-100 milliliters into a plastic tube (suitable for blood transfusion systems). It can be smaller, but then you have to repeat. Insert the tube into the dipstick hole. The probe, of course, be removed before that. Draw out as much oil as needed with a syringe. Finally, check the oil level.
Good day to all! After reading this article, you will know what happens if you pour oil into the engine. Of course, it will not be possible to answer your question exactly, since everything depends on factors such as engine wear, make and model of car, amount of excess oil, time of year, etc. But I will try to paint everything as detailed as possible. So let's go.
Probably, every car owner, sooner or later, when replacing engine oil, faced such an unpleasant moment as engine oil overflow. It seemed to be, but what's wrong with that? A lot is not a lot. The more oil, the better lubricant. But in this case, the principle "You can't spoil the porridge with oil" does not work here. You may not spoil the porridge, but it’s very real to spoil the engine with oil. And I'm not talking about the quality of the oil. Namely, its quantity. Not adding oil, just like overfilling, can be fatal for both individual parts engine and the engine as a whole.
Consequences of oil overflow into the engine
1. If you poured a small amount of oil into the engine, then no catastrophic consequences should occur. A small amount should be understood as a deviation along the probe of no more than 1-3 mm in a large direction. As a rule, manufacturers with a margin calculate the risks on the car's dipstick. And the designations MIN and MAX are very conditional. Even at the margin of error. Therefore, in this situation, nothing bad will happen to the engine.
2. If you poured oil an order of magnitude more than required, then problems may arise with the engine. The fact is that during the operation of the engine in oil system there is a certain pressure, which is designed for a certain amount of oil. If there is too much oil, then it will begin to squeeze out. Here the rule works: "Tears where it is weak." Of course, the pressure in the car's oil system is not enough to render metal parts unusable, so oil seals, gaskets and sealing elements are the first to be distributed. Everything becomes more complicated winter time when the oil becomes thicker and the pressure in the system increases accordingly. In this case, due to oil overflow into the engine, the camshaft, crankshaft oil seals, as well as crankcase, oil pan gaskets, valve covers and seals of various sensors and mechanisms may fail. Which already means not very cheap repairs.
However, this was probably the most serious consequence of overflowing oil in the engine. However, due to overfilling of oil, fuel consumption may increase, as well as engine power may decrease.
In addition, carbon deposits are quite possible on engine parts.
Overflowing oil also threatens its excessive consumption in the engine. Hence the additional costs for the car owner. Oil consumption can harm the exhaust system, which includes expensive exhaust gas cleaning elements (catalysts, particulate filters etc.).
These are probably the most common consequences of overflowing oil into the engine.
Poured oil into the engine. What to do?
Let's figure it out what to do if oil is poured into the engine. Rather understand what to do. Poured - remove excess from the system. Everything is simple. Let's figure out now how to do it.
1. The simplest thing is to give the car to the service. Specialists will do everything themselves, but you will have to pay for their work. Option fit those who do not want to bother and have extra money for repairs.
2. The second method is more complex and requires some manual dexterity. But no magic. We will need to drain the excess oil through the drain plug or through the oil filter. We unscrew the drain plug (not completely !!!). As soon as the oil starts to flow, we substitute some kind of container and wait patiently. Then we wrap the drain plug and check the level on the dipstick. A similar procedure can be performed through the oil filter. The principle is the same. Weaken the filter, drain the oil into a container and wrap the filter again. All that remains to be done is to remove excess oil from the crankcase.
3. The third way is the most successful in my opinion. For implementation, we need a 150 cc syringe and a dropper tube. We buy what we need at a regular pharmacy. We take out the probe and insert the tube from the dropper into the hole. On the other hand, insert the syringe into the tube. And just pump out excess oil from the engine. When the procedure is completed, check the level on the dipstick.
