As long as someone is trying to create a good motor, someone else quietly doing bad. Or port is good. Apparently, the contrast to car owners could always say, "I have a normal engine, but Vasily Ivanovich - oo-oo-oo».
But seriously, it is not very reliable engines, with limited resources and often require a visit to the service has always been a lot. But the paradox is that not all of them are considered to be unreliable. Focus here in the expectations of owners in the availability of the service and its price. Sports car owner knows that in case of serious engine load is not likely to last a long time. In contrast, a commercial truck buyer rightly expects a few hundred thousand trouble-free run, and the main driver of the truck - a million.
For the same reasons, it is useless to complain to the motor Lada, who after run in 150-200 thousand in need of major repairs, because the issue price is equivalent to the cost of a MOT for a car a couple of classes above, or replace the chain on the babe in the class + at much less run. A minor troubles - owners to stick with them.
Yet there are motors, from which many expect, and get some problems. Why is this happening?
"Blame" the reputation of the brand, which has previously proven itself a "reliable»
Scope of the machines does not imply that it would be problematic powerplant
Shocking cost of repairing the unit prices on the background of cars
We start with "reliable diesel engines", amid concerns gasoline engines, they seem to be quite reliable, but expectations still deceived.
The family of diesel engines in volume from 1.6 to 2 liters and power up to 218 hp produced since 2007, installed on all cars BMW, except for the largest, as well as on car Mini.
This is a very common diesel engine has a number of very unpleasant features.
So, its timing chain drive is located on the flywheel side and a replacement requires removal of the engine from the car. All anything, but the resource chain may be less than 60 thousand kilometers. Foreboding a characteristic noise, and if it is ignored, in addition to malfunctions and reduce the power the engine can be directly send to the landfill, open circuit occurs in modern engines with ease. Chain me on the warranty, but it does not help for long.
Besides the problems listed chains - unsuccessful intake manifold flaps which when failure fall into the valve and into the cylinders. Consequences of the most unpleasant, until the "Stalingrad", but often manage to get rid of a couple of scratches on the mirror of the cylinder and damage the turbine.
You little two serious problems? There is a third typical problem - piezo-electric injectors on the most powerful version of the engine is easy to fail and have limited resources. And they are quite expensive - a set will cost more than 100 000 (!) Rubles.
You do not change your mind to buy a car? Yet two liters and good traction, impressive efficiency make this engine very common, and is no better alternative.
Mitsubishi 4D55 / 4D56
These four-cylinder engines of 2.3-2.5 liters installed on Mitsubishi cars since the 80s to the present. Typically, as long as the engines produced are problemlos times, but it summed up the generation of modernization.
Initially, after the appearance of naturally aspirated engines turbines have grown strongly in the power and at the same time they have a whole bunch of problems related to overload the construction. Here and cracked cylinder head and rocker shaft breakage from jamming, breaking and camshaft timing belt breakage, and overheating, and even a crack in the engine block.
Mechanical failure added numerous, but less serious problems with the system power Di-D. In areas with extremely cold climates, there are cases of serious damage engines with very few standards for diesel probegami- 100tkm less then the engine is easier to replace than to repair.
But everything is explained simply, naturally aspirated engines in the 80s had a capacity of 70-74 hp and the latest versions with variable turbine geometry has issued 178 forces. And because diesel engines are staged not only on SUVs Pajero, but in pick-up trucks and light commercial vehicles, then their reputation has been badly tarnished - this class is accepted to take responsibility for security. Especially a failure motors of these series look at the background of such hits as regards reliability as TD42 Nissan and Toyota 1HZ.
For gasoline engine resource requirements are usually lower, but the beginning of the two thousandth's gradually accustomed to a high share of car owners and the general hassle-free units from leading manufacturers. Then, no one knew that the leaders of reliability through decades Korean brand will go ahead, and the Europeans and the Japanese.
Mercedes M272 / M273
Frustrated by shtutgarttsy came in 2004 and initially delighted owners excellent traction and high efficiency. We put them on nearly all cars Mercedes, from C to S class, including all SUVs. Motors M272, volume from 2.5 to 3.5 liters and power from 201 to 316 hp It was also the most progressive. All-aluminum, with alyusilovymi cylinder with four valves per cylinder ...
But runs of 40-60 thousand kilometers suddenly started having problems with the timing chain tension and vibration. An autopsy showed ground off balance shaft sprocket and chain stretching strong. Unfortunately, for the replacement of balancer shaft with a star need to remove the engine, and sometimes break off dampers chain can not be replaced without removing the cylinder head. In fact, the maintenance work required to complete the removal of the engine bulkhead.
Especially disappointing was that for those who have been running less 50tkm. There are problems with the intake manifold, oil cooler and score current crankcase ventilation were like the cherry on the cake - albeit expensive, but not so.
Not so often, but much more of a problem become bullies piston, especially on engines of 3.5 liters or large V8 273. Repair in this case is extremely expensive, it is done by replacing the cylinder assembly with the plunger and the crankshaft (the so-called shot-block), or gilzovaniem, with deviation from the norms of the factory.
Over time, the problem persists, the chain began to go longer and changed the balance shafts during revocable campaign yet in 2008-2009, but the glory of the problem with respect to the motor got badly tarnished impression of the brand, which rarely allows so many "pinholes" in the same engine.
Engineers Volkswagen ruined the pursuit of power and economy readings. EA111 engine family is available since 2005, it has as atmospheric engines and turbocharged, but the "distinguished" they are. Most criticism is turbocharged engines with direct injection 1.4TSI, but even atmospheric 1.6FSI and small 1.2TSI can deliver a lot of problems.
Motor 1.2 scored extremely low resource chain - sometimes it does not pass and 30 thousand kilometers before replacement. Then the problem begins with the turbine - electric control its geometry and vastegeytom failure. The rest of the engine proved to be good enough - he got a strong group of piston and cylinder head problems almost was not.
On motors 1.4 company to run in a variety of new technologies, in particular, the first versions have a variant with double supercharging - was the engine driving the compressor and turbo, and they are all equipped with direct injection. Power forced most options reached 180 hp, but most of the engines had 122-140l.s., Which is also a lot of scope for this.
This high power and very compact design right has created many problems owners. The engine retained a high degree of compression and detonation happens even when working on 95th gasoline. She suffers and turbine. The oil from the crankcase ventilation system with the gases from the recirculation valve (EGR) heavily polluting eventually liquid intercooler turbocharger, which was located inside the intake manifold.
So high load pistons destroyed, often crippling the engine completely. Do not contributed to the longevity and massive deposits on the intake valves, resulting in valve stopped normally closed that entailed overheating, knocking and damage the cylinder head.
The nozzles direct injection and generally the power supply system of the motor turned a little prepared for the quality of Russian gas. The failure of the pump, pollution filters and nozzles proved to be typical and most terrible companions owners. Focuses Bay of gasoline in the engine crankcase through the high pressure fuel pump is also not considered the original malfunction.
And to top it all, he summed up the "eternal" timing chain. On motors 1.4 shestnadtsatiklapannaya cylinder head, as opposed to a simple vosmiklapannoy cylinder head engine 1.2. Here, too, the other circuit, so that it does not go 30 thousand, and much longer, often stretching only 100 thousand run, the benefit of its replacement on such motors are relatively inexpensive. But the chain often jump during the reverse rotation of the motor, for example, when setting the machine "on the transfer of" unsuccessful towing, loading on the tow truck or replacement clutch DSG. After the jump is usually folded over the valve.
Atmospheric engines, which many bought as a panacea for the unreliability of turbocharged, too, were suddenly at risk. Problems with the same circuit as that of the motor 1.4. They are compounded by an attempt to keep a low oil pressure, and as a result - low resource liners, crankshaft, connecting rods and piston bully in the group. The phrase "knock on CFNA» has become one of the main topics folksvagenovsky forums and at the same time - a headache for managers and craftsmen guarantee.
Of course, the upgraded engines. The latest versions of other engines equipped with pistons and a more reliable chain 1.2 changed the rules of the turbine and maintenance. But a new generation of EA211, which replaced the "old men" away from sin equipped with reliable and cheap in the timing belt, and a completely new cylinder head design that allows this engine to quickly warm up in cold weather - this feature also users complained machines.
The problems of these motors in varying degrees, typical of the new series of engines VW-Audi, but it is on the "small" contrast exhibit all the design flaws. Larger EA888 all three generations have a similar set of problems, but they occur much less frequently and with greater mileage.
The Bavarian manufacturer in our competition takes two prizes in the nomination "The horror of the motor." These engines are quite in line with our terms - they are massive, and very, very problematic.
The family of engines in volume of 1.8 and 2 liters was replaced in the lineup structurally very similar N42 (including on) in 2004 and produced up to the present time, although already partially expelled turbocharged N13.
It would seem - just 4 cylinder, no boost power to 156 power ... Such motors are usually very tenacious. But not in the case of BMW. The desire to minimize fuel consumption, increase efficiency at idle and partial load, and thus ensure a good power play with designers and buyers of motor cars a bad joke.
Motor was very difficult for the class: there are throttle-free admission Valvetronic, and variable valve timing system Double Vanos. These "freaks" and at the same time a very high operating temperature spawned a whole bunch of problems.
Heat engine leads to rapid coking of oil, particularly in the piston ring grooves. On the second or third year of the valve stem seals begin to break down and oil consumption increases dramatically. At the same time begin to break down the plastic guides and washers in the timing, vykrashivayas slowly into the crankcase of the engine.
Oil deposits, in turn, begin to disable the hydraulic systems Vanos and Valvetronic. On the third or fourth year of life, the engine consumes oil as a twenty-year "grandfather" and can easily please the owner of the failure of any of the systems from the timing to electronics. It's time to make major repairs - if you try to pull this, it is possible, "capital" will have nothing. The engines of these cars met at the BMW 1st, third and fifth series, as well as in the crossover X3, and released them a great deal. And more extensive inline sixes N series suffer the same problems.
Often problems such motors may be postponed for an indefinite period, for example, if the pouring 98y only gasoline and more frequent oil changes. Yes, not every cast, and special series, and the desired viscosity. Still it is possible that something clean, something in time to change, otherwise configure any system ... But overall all one, such a motor can trap you under the hood is very pleasant in all respects the car and impress you with its betrayal to the heart .
What is the result?
As you can see, respected brand does not necessarily mean total reliability. To some extent punctures with longevity inseparably linked with the desire of engineers to develop engine building. Normally, unreliable engine is an innovative, driven around in what some new technology, and driven around is not very good. Of course, there are also examples of relatively simple engines, from which "no one expected." Well, no one is immune from mistakes - even the largest corporations.