Those who read my reviews machines on the secondary market can be noted that the motors, since the N-series, are usually among the “problem”. The bulk of the engine at a fairly low mileage is already beginning to consume oil. But the “legend” says that the BMW engines “must eat it”, and this symptom is not perceived by the majority as the beginning of the end.
and gidronatyazhiteley. This usually leads to serious damage or cylinder group, or simply to motor failure.
Repairs often the most serious: the replacement of the crankshaft, pistons, and sometimes shot-block. In many cases, the motors is obtained in the release piston modernized group, the new parameters of a number of nodes, including crankcase ventilation. But this factory “upgrade” moderately effective and also not cheap. Piston group is expensive, and its replacement requires complete disassembly of the engine, so that a preventive repairs are rare, usually all the substitutions are made within the framework of a major overhaul.
The position of the majority of owners unpretentious “does not consume oil only broken engine,” “if BMW does not eat oil, then it was over,” and other slogans absurdist well reflect its essence. the best way to solve it.
There must be a favorite question of Russian classics.
Denying there is a reason. Let’s face it, the level of understanding of the processes occurring in the engine the majority of owners, does not go beyond the level of knowledge, which gives the driving school. Moreover, the solid part of the auto-service employees had left the car owners is not very far, in terms of the spirit sayings “In every case of life, the carburetor does not suck, land flywheel throws,” and of all the ways to solve problems prefer the sequence “make out to see, to gather new parts again, as close as possible to the original, “and nothing more.
And certainly do not try something they improve, increase the duration of work and do not engage in such foolishness. The situation is not easier by the fact that those who seem to loudly call themselves “tuners”, in fact, very rarely a systematic approach to problem solving and not delve into the features. Although the term itself suggests that they are not only trying to flash the wrong firmware and set the bolt-on tuning … In this situation, a simple to use only “original” consumables and maintenance components seem “real BMVvodu” the only correct decision. And, of course, I will try to explain why this is not so.
A critical mass of successful “collective” decisions increases with time, and the owners know about them anyway. Or they are offered by “tuning” changes in the company, or during the next visit to an expert service catches the car and proves the need for change or the owner himself finds the solution to the problem on the web.
But the more expensive the car, the more money the owners and the less chance of mass adoption of these improvements. Official service looks askance at those who modifies the “perfect product”, and the rest is very little chance to talk with the owner of a brand new BMW. But all the problems of modern petrol engines BMW have a common cause, which is relatively easy to explain, and cost. I already wrote about the types of oils and how they age. Now it is time to apply the knowledge to the motors BMW.
The essence of the problem
Most of the problems of the modern motor way or another related to its operation temperature. it is the rapid aging of seals, oil leaks inside and outside wiring damage electronic modules (especially modules, ignition and engine sensors), high risk of seal failure of the cooling system, a low margin to overheat and increase the risk of detonation. a general increase in oil fumes and excellent conditions for its coking around the motor due to the rapid aging and loss additives.
The second factor, which relates to part of the engine BMW, particularly “distinguished” on the basis of oil fumes, – a high temperature piston. This is usually due to the small thickness of the piston rings, low height Zharov piston belts and low-flow through the cooling oil jets.
In addition to this common problem is the oil pump, or more precisely its design, which for the sake of efficiency and control capabilities has become not very reliable and also allowing lowering of oil pressure to a critical minimum in case of overheating and aging.
There are other problems of a constructive nature. Here and defects alyusilovogo coverage, piezo injectors and failed on a number of engines, and poor timing design on a number of others. But these problems can be solved by the manufacturer under warranty and recall campaigns. Change any components or engines entirely.
Some people have no luck, and the engine does not receive the entire amount of improvements. However, these problems relate to the individual series of engines, and even without being a general, often serve as a supplement to the first three factors.
What to do
Do not despair and to save money for the repair. The design of modern engines often have reserves of strength, if the matter is approached with understanding.
High temperatures are not so necessary if you do not pass the standard tests on fuel consumption and environmental friendliness. it will prolong the life of the catalyst and reduce emissions in the long term.
This requires little cooling system upgrade. the thermostat. In electronically controlled thermostats in the BMW opening temperature of the large circle – 115 degrees. It is objectively much. Our goal – to reduce the temperature to 85-90 degrees. And to go into the control unit firmware you will not need. Fortunately in the thermostat has a heating element that can be powered directly from the battery though. But this is the easiest level, which can be done in 5 minutes, with the most elementary notions of the vehicle unit. The main thing – to see to it that the heating element remains serviceable. The actual coolant temperature at which turn a large circle through a radiator to heat in the oven, just drop to about 90 degrees. The second option – a flashing unit. And third, for the guru – the replacement of the thermostat at a low temperature for up to a temperature of about 85 degrees, well or modifications to the standard.
Here is useful catalog of aftermarket parts or mechanic skills.
If you have a conventional mechanical drive pump, the thermostat on the revision can stay, but the new series of engines have an electric pump, and without any firmware modification that increases the speed of its rotation, or the new “kolhozinga” is no longer enough.
For correct operation of the cooling system in a traffic jam will probably have to intervene in the control software for the earlier the radiator fan, but practice shows that the first stage is usually sufficient to reduce the operating temperature of the engine is quite acceptable to 90-100 degrees, which provides twice, and even three times longer normal operation of the engine seals and a sharp decrease in the risk of detonation. And it reduces the temperature of the oil in the crankcase of 10-15 degrees and reduces the risks of coking.
We entered into the taste of tuning? We go further – finalizing the oil pump. they can be managed in two ways: either a proper modification of the engine firmware, or turning off the oil pressure sensor / actuator pressure change in the pump mechanism. This will force the inclusion of the high-pressure mode, but can also cause the appearance of error and switch power limitation mode.
their owners in their cars in the first place should pay attention to the possibility of such tuning. Piece vulnerable, and it is not necessary for a couple of percent fuel economy at low load, increase the risk of scuffing.
Actually, completed but not finished the story of this modification to the engine and its control system.
From the oil in the engine depends too much, just hope that the manufacturer recommends the best. Especially because in the case of BMW is definitely not the case. the web is full of examples disassembling engines with ranges of up to 30 thousand kilometers, piston rings which have completely lost mobility.
And let me remind you that the BMW somehow suddenly recently replaced the supplier of oils, than has created a small storm. Supporters of the brand … uh-uh, well, let’s call it “bowler”, argue with supporters of the brand “snail” for the right to be “thus” oil, for which the engines are made. Although it is obvious that just one provider failed too, and now the hope of the other cheap oil.
it’s just a fairy tale, which is told for many years authorized dealers to ensure that you are served only at them. The most enterprising companies do not advertise products, and hung on the canister and butter own brands. But all this is marketing and nothing more.
For good performance of the motor, which uses problem solving, easy to coking, piston rings and valve stem, complex hydraulic systems and oil pumps are very delicate, essential oils, which do not provide the absolute purity of the components, even at very high temperatures. Unfortunately (or fortunately), it is not promotional material, and I can not give specific brands of oils, but mostly it will be oil on esterovoy basis, and perhaps more exotic oils – on polyglycol.
Why? When using oils with a high proportion of esters, of PAG and PAO, and timely to replace them in the rings just do not get the chance coked, even though the design of the engine failures. These oils not too expensive compared with the cost of repair and even the cost of gasoline, and increasing the cost of consumables is quite insignificant in comparison with the cost and lost work time.
But the decrease in drain intervals up to 7000 using conventional oils fundamentally changes nothing, contrary to popular belief. On heating oil does not require thousands of kilometers to a high temperature, and the unit, so that a reduction in the replacement interval will only lead to slightly lower risk for the crankshaft and oil pump liners, but little impact on engine pollution. four or six thousand kilometers.
If the subject of the article interested you, before you act, I recommend to read carefully the existing alterations in the network. Check whether there is another sense in themselves. you can do the replacement engine seals and gaskets, temperature change and the transition to the “correct” oil.
If oil consumption has more, all changes will slow the development of the problem, but most likely will not be able to eliminate already begun the process of coking piston. Is that exotic PAG-oil can help in theory. Well and good Decarbonizer like liquids for GDI-bit engines will improve the situation. But most likely, it will overhaul. And here, in addition to the bad, there is also good news. Paradoxically, but after qualitatively and competently carried kapitalki motor will live longer and happier than a new one.