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Infiniti QX56 Z62 common problems and illnesses
How problematic is Infiniti with mileage?
The first and main thing that all the reviews of the owners are full of - increased wear of timing chains... In fact, this problem is not associated with any miscalculations of the engineers in the engine, but the banal result of supplying defective chains to the manufacturer's plant.
This defect is recognized by the Infiniti representative office as a massive one and the timing chains are replaced free of charge for a revocable campaign. In other words, faulty fast stretching timing chains on the QX56 are NOT a problem. You can find out whether a certain Infiniti QX56 or QX80 is eligible for chain replacement by calling any Infiniti OD.
When viewed from Infiniti QX56 before buying using computer diagnostics it is necessary to find out the angles of the intake and exhaust camshafts in the load and simple - this will allow you to find out the degree of elongation of the timing chain and the need to replace it. It is also worth bothering to ask the seller (if he is the owner) about the documents for replacing the chain, if it was carried out. There is no point in trusting sellers without documents, as well as trusting outbids.
We emphasize that replacing timing chains at Official dealer- is free, you are not required to agree to replace any other parts that the dealer "recommends" to replace. Typically, ODs try to breed clients for additional replacement work. oil scraper rings and caps. In addition to the chains, there is a recall campaign to replace the rear arms and fuel gauge on the QX56 and QX80.
Important! Only "racing" operation on a stretched chain leads to chain skipping and further internal damage.
The second widely discussed problem of the Infiniti Qx56 is oil consumption and oil starvation. There are a lot of unconfirmed and invented cases in this regard. First of all, it must be said that oil waste for VK56VD engines is the norm. Average oil consumption for 100 thousand kilometers real mileage Infiniti Qx56 - 1-1.5 liters of oil per 10,000 km.
Because of what happens oil starvation QX56 Z62 (VK56VD)? Infiniti QX56 and QX80 do not have electronic system monitoring the engine oil level, i.e. no electronic probe, therefore, it is not uncommon for owners or outburs to ride before sale on Infiniti QX56 with big runs do not monitor the oil level and are not interested in it in principle. As a result, it is possible to get scuffing of the working surfaces of the cylinders or beds of the PB or the inserts of the KB.
Low oil level and / or constant aggressive operation leads to localized overheating of the engine... Overheating is very unpleasant for this motor. in addition to the usual troubles and increased wear, direct injection and catalysts suffer. To check for symptoms of an overheated engine before purchasing, you need a long test drive, as well as an inspection of the interior of the engine with an endoscope through the oil filler neck.
Problems of catalysts QX56 / QX80 Z62
Ceramic chips in cylinders and seizures
Does the VK56VD motors seize? Despite the aluminosilicate coating of the cylinder walls of the aluminum block head, this otherwise cast-iron engine has few scuffs and is associated with high mileage and overheating, rather than wear of the catalysts.
There are numerous reviews of the owners of Infiniti Qx56 with mileage indicating more frequent death of catalysts on this car than on the rest of the brand's lineup. Considering that the material of the catalysts is identical, and the manufacturer has not changed, this situation may seem extremely strange.
In fact, everything is much simpler - the fact is that for engines VK56VD direct injection(QX56, QX80, M56, Q70S), a more advanced and smarter engine ECU is installed. The algorithms of the new ECU make it possible to determine earlier the decrease in the efficiency of the catalysts, compared to older versions (for example, VK56DE for the QX56 of the previous body, or all FX35 FX37).
As a result of earlier triggerings of the algorithm, the end users of the car think about the lower reliability of the catalysts, when in reality the self-diagnosis system on other cars is simply not aware of the state of the elements of the exhaust route.
In most cases, if an error occurs with the low efficiency of catalysts, there is no direct need to replace them or unroot them with flashing to Euro2. It is necessary to dismantle the cutters and their visual assessment. It is usually sufficient to spot weld the mesh inside the catalyst in place so that the catalyst does not have a degree of freedom inside the metal housing.
If your catalysts really began to deteriorate or melt, you cannot just upgrade to EURO2 in order to extinguish the error. The decaying catalysts must be cut out or replaced, otherwise the destruction of the upper catalysts and subsequent filling of the cylinders with ceramic dust may begin.
Are the problems of the Infiniti QX56 with the engine and catalysts so terrible? Definitely not. Cases of destruction of the coating of cylinders due to destroyed catalysts - less than 0.5%. The main reason for the destruction of the alusilicon coating of VK56VD cylinders is oil starvation and overheating. Therefore, we do not recommend proactively cutting or changing anything.
Diagnostic Laboratory -
Car selection
premium segment in Moscow
If you want to to ride by car, not study its potential Problems
Why worth contacting to us for checking the car
before buying or car selection Full construction?
The car selection service from the Diagnostic Laboratory is not just a search for a car with a lower mileage or a body inspection with a thickness gauge: we perform the whole range of necessary checks large and expensive units to repair, so that you do not repair in principle.
Infiniti Qx56 and Nissan Patrol do not like long exhausting off-road. Despite the presence of a frame and a low gear, the transfer case of these cars overheats quite quickly when slipping. It is imperative to check all off-road modes in a test drive. No errors in the system all-wheel drive in this case it says nothing.
What kind of suspension does the Infiniti QX56 / QX80 have?
We understand the vinaigrette of pneumatic and hydraulic suspension Z62
The Z62 platform has a very clever hydropneumatic suspension. Let's start with the fact that pneuma is available only on the Infiniti QX and is absent on the co-platform Nissan Patrol, it should also be emphasized that Infiniti pneuma is only on the rear axle.
Pneumatic is inactive and serves only for the comfort of rear passengers and body level control. Cases of malfunction of pillows or compressor are rare. There is NO pneuma in front, and it is not possible to manually increase or decrease the clearance level.
The cost of the air suspension compressor for the Infiniti QX56 ranges from 25 to 50 thousand rubles, depending on the city and the type of retail network. Rear axle air bellows run on average 200 thousand km, but most often significantly longer. The reason for replacing them is usually leaking fittings, as a result of which the machine falls back during a night idle.
Infiniti QX56 / QX80 shock absorbers are not conventional, but with hydro reservoirs connected to a common hydraulic circuit with pumps and two accumulators. In fact, this system is an analogue of the ABC (Active Body Control) hydraulic suspension from Mercedes, with the only difference that in Infiniti the clearance is not regulated by the pressure in the hydraulic struts, because the hydraulic props are made a little differently.
The hydraulic suspension of the Z62 acts as a shock absorber and stabilizes body roll at the same time. In terms of changing stiffness and ground clearance, the system is passive and does not have a range of changes / adjustment. The roll suppression mechanism, on the other hand, is also active when cornering, with a delay, but tries to control roll and body swing. It is impossible to change the rigidity of the system, the system is not controlled by the driver.
Despite the technical complexity of the hydraulic suspension, Infiniti practically does not have any problems with the integrity of the hydraulic circuit, accumulators or pumps.
What is the difference between QX56 and QX80?
How does the Infiniti QX56 differ from the Nissan Patrol?
The main difference in technology is different brakes and different diameters of brake and wheel discs.
The QX56 has floating calipers for a larger disc diameter than the Patrol, which has the standard Akebono brakes found on the FX37 and other cars.
Wheels on Infiniti QX56 / QX80 were installed by default only R22.
There is no rear passive air on the Nissan Patrol, but the hydraulic suspension is exactly the same.
Diagnostic Laboratory -
Car selection
premium segment in Moscow
If you want to to ride by car, not study its potential Problems- contact our company, we will select the most serviceable car for you. We are well versed in the problems of these cars and know how to detect wear, thanks to the fact that we work only within the framework of specialization and our own knowledge base.
SUSPENSION
Suspension compressor and rear shock struts
Period of occurrence
The destruction of the choke connections, like the death of the compressor, occurs approximately by 80-130 thousand km. exploitation.
Compressor breaks down over time rear suspension... The problem is solved by replacing it with a new compressor, unfortunately there are no analogues. But before changing the compressor, it is recommended to fully diagnose the connection between the compressor - the pipeline to the shock absorbers - the shock absorber fittings - the shock absorbers. Quite often, the problem in working with the rear suspension lies precisely in the notorious fittings, the connections of which with the shock absorbers rot and the pipeline begins to poison the air, and in the case of an understatement of the machine, dirt enters the compressor along with the air, which quickly makes it unusable.
The fittings are not manufactured separately, so the panacea is to replace the tubes and shock absorbers, or to weld the fittings. In addition, malfunctions in the correct operation of the rear suspension may be associated with the death of the body position sensor. In any case, in case of any malfunctions in the suspension, first of all, comprehensive diagnostics in a car service will help.
Approximate issue price
Rear suspension compressor: 25,000-29,000 RUB(original Nissan (Infiniti)
Body position sensor: 8,000-10,000 RUB(original Nissan (Infiniti)
Compressor-shock absorber tubes: 1500-2800 rub. Pcs.(original Nissan (Infiniti)
Rear shock absorbers: 9800-11.800 RUB PCS.(original Nissan (Infiniti)
STEERING
Power steering pipes and hoses
Period of occurrence
80-130 thousand km.
Problems, diagnostic methods and solutions
One of the problems that all QX56 JA60 owners face is leaks in the power steering system. Initial diagnostics are quite trivial and available to every car owner - this is to look under the front of the car in the morning. Did you see oil stains on the asphalt? The first bell is that the power steering pipeline is leaking. As a rule, it can start flowing from one place, but according to experience, the entire pipeline wears out evenly and it has to be changed entirely. If you delay for a long time with the solution of the problem, then the lack of power steering fluid is fraught with failure of the power steering pump, which is already much more expensive.
Approximate issue price
Pipeline (hoses, tubes, clamp) Power steering assembly Genuine Nissan (Infiniti) 14,000-17,000 RUB
TRANSMISSION
Automatic transmission pipeline
Period of occurrence
Problems, diagnostic methods and solutions
One of the reasons for the failure of the automatic transmission on the Infiniti QX56 can be the critical wear of the automatic transmission tubes. Oil begins to leak (squeeze out) from the tubes, the level in the box drops and the automatic transmission quickly becomes unusable. Timely diagnostics and replacement of worn-out tubes will help to avoid such a problem.
Approximate issue price
Reducers front and rear, loss of drives (CV joints)
Period of occurrence
The problem usually arises over long periods of operation.
Problems, diagnostic methods and solutions
Front and rear drives(gearboxes, CV joints) Infiniti QX56: Semiaxis falling out and gearbox destruction front axle probably due to driving in 4H mode on asphalt or during sudden starts with inverted wheels.
Approximate issue price
The repair budget is determined by the service based on the diagnostic results.
Cardan shaft
Period of occurrence
Failure of cardan crosspieces occurs approximately every 2-3 years or 40-60 thousand km.
Problems, diagnostic methods and solutions
Like other Infiniti models, the QX56 has a problem with the destruction of the crosspieces. cardan shafts(more often the front, less often the back). In the early stages, characteristic "clatter" clicks appear when the automatic transmission selector is switched from "R" to "D". Destruction of the front crosspiece cardan shaft occurs in motion, while there is a characteristic metallic knock and grinding in the area of \ u200b \ u200bthe legs of the front passenger. The VDC, SLIP lamps come on. Destruction of the case is possible front gear, as well as the transfer case housing, the cost of which is several times higher than the price of the propeller shaft.
It is best to diagnose the wear of the driveshaft crosspieces on a lift in the service, where you can accurately measure the backlash and give a verdict. On the driveshafts, the QX56, unlike its fellows in lineup there is a replacement for the original front crosspieces on both shafts, both for rear-wheel drive (2WD) and all-wheel drive (4WD, AWD) versions of the car. If the rear cardan crosspieces are damaged the best option The solution to the problem is to install new original Nissan (Infiniti) propeller shafts.
Approximate issue price
Front propeller shaft original Nissan (Infiniti): 35,000-40,000 RUB
Rear propeller shaft original Nissan (Infiniti): 40,000-45,000 RUB
Front universal joint crosspiece original Nissan (Infiniti): 1800-2600 RUB
Rear cardan joint original Nissan (Infiniti): 6500-8500 RUB
BRAKE SYSTEM
Front and back braking systems
Period of occurrence
Unfortunately, the problem can arise at any time :(
Problems, diagnostic methods and solutions
The 2004-2007 QX56 JA60 models were initially fitted with rather poor front brakes. Later models of the Infiniti QX56, from 2008 in the JA60 body, began to be equipped with enlarged brakes, which, nevertheless, are still not enough for many to fully use the power reserve of a three-hundred-horsepower engine and stop a heavy-weight unit. Brake discs overheat and deform due to insufficient diameter. There is a beating of the steering wheel when braking.
Solution:
The most budgetary, but least effective - brake disc groove. With a larger budget, it is recommended to replace the stock brakes with reinforced perforated brake discs with metal-ceramic brake pads. This system partly helps to solve the problem, but especially active owners of QX56 and lovers of an aggressive driving style are recommended to install multi-piston sports braking systems, such as AP-Racing, StopTech with an increased diameter of brake discs. These braking systems are quite expensive, but you will completely forget about the problem of brakes.
It should be noted that the distribution of braking loads is divided 70% by 30% in favor of the front axle, so in most cases it is possible to limit the replacement of the brakes to the front only. In addition, advice for those who know how to count money: after replacing, do not rush to throw out the old brakes. When you decide to part with the car, just put the old brakes back, and sell the new ones, as a rule, they are always in demand.
Approximate issue price
Brake system from Infiniti FX50 Nissan (Infiniti): 70,000-80,000 RUB front axle, 60.000-70.000 rub... rear axle.
Brakes AP Racing, Brembo, JBT: 130,000-300,000 RUB front axle.
ELECTRIC
Dashboard
Period of occurrence
Over time, during operation.
Problems, diagnostic methods and solutions
Many drivers are faced with the fact that individual elements and devices fail on the dashboard. You can solve the problem either by visiting a handy electrician, or by buying a new dashboard, but the prices for it are quite high, and in Russia they are usually not there, the delivery time from abroad is from 3-4 weeks.
Approximate issue price
Original dashboard Nissan (Infiniti): 33,000-55,000 RUB PCS.
Tailgate lock and wiring to it
Period of occurrence
With time in use, it is more common in large cities.
Problems, diagnostic methods and solutions
Failure of wiring and tailgate locks due to interaction with deicing agents is one of the problems that is especially evident in large cities. The solution is to replace the lock, wiring, or both. The verdict is made by the master on diagnostics.
Approximate issue price
Repair cost: from 10 000 rub. up to 30 000 rub... depending on the verdict
Door locks
Period of occurrence
50-120 thousand km. Depending on climatic conditions.
Problems, diagnostic methods and solutions
On QX56 cars in the JA60 body, as on all its younger brothers, there is a problem with door locks freezing in winter. The cure for this disease is pre-lubrication. In addition, a more sad event may occur - a break in the lock cable. In this case, there is only one panacea - replacing the lock with a new original Nissan (Infiniti). Unfortunately, the problem affects all four locks. After purchasing a new lock, it is recommended to lubricate the cables to avoid problems.
Approximate issue price
Original Nissan door lock (Infiniti): 8000-12.000 RUB PCS.
ENGINE, COOLING AND EXHAUST SYSTEM, FUEL SYSTEM
Catalysts
Period of occurrence
80-150 thousand km depending on the quality of gasoline and operating conditions
Problems, diagnostic methods and solutions
Due to the use of low-quality gasoline, catalysts fail during operation. Failure to pay attention to this problem is fraught with the ingress of ceramic elements of the destroyed catalyst into the engine and, as a result, damage and gradual destruction. One of the signs of a destroyed catalyst is that the car “does not pull”, a knock is heard from the engine side, a rattling sound, speed is floating, “ Check Engine», Errors in the operation of lambda probes (oxygen sensor) drop out.
There are several ways to resuscitate a patient. The first, the most financially intensive, is to supply new catalysts. The second option is more budgetary, to install flame arresters with blendes, or low resistance catalysts. You can also realize your old dream and install a tuned exhaust system without catalysts, for example, Stillen, at a price it will be comparable to the price of new original ones.
Approximate issue price
New original Nissan (Infiniti) catalyst: 50,000-110,000 RUB PCS.
Fuel pump
Period of occurrence
The pump fails for about after 100 thousand km. mileage, but the period very much depends on the operating conditions and the quality of the gasoline used.
Problems, diagnostic methods and solutions
Enough frequent problem- failure fuel pump... The main reasons: insufficient cooling due to a small amount of fuel in the gas tank, low-quality gasoline clogs fuel filter at the pump inlet (supplied with the pump), factory defect. When the fuel pump fails, first "dips" appear during active acceleration, then, gradually, the total power decreases at medium and high revs engine - the car "does not run". At the same time, it starts up and works normally on Idling... The problem is being solved by purchasing a new fuel pump.
Approximate issue price
Fuel pump original Nissan (Infiniti): 19.000-25.000 RUB PCS.
Radiator and fan motor
Period of occurrence
The radiator may break down after a year of operation if not properly maintained.
Problems, diagnostic methods and solutions
On early 2004-2005 QX56 JA60 models, there is a problem with the electric fan motor, which can jam, which can lead to engine overheating and even ignition. The problem is solved by replacing the motor with a new one. Also a widespread problem is radiator contamination, which can lead to failure. To see the condition of the engine cooling radiator from the outside, the air conditioner condenser interferes, the cells of which are larger - dirt and fluff easily pass them, settling on the honeycomb of the cooling radiator.
In principle, there is less dirt from the inside (from the engine side), besides, the cooling fan, like a vacuum cleaner, cleans the inner surface. You can only see that the radiator is "clogged" with partial disassembly. A panacea can be periodic (at least once a year) cleaning of the radiator, in addition to cleaning with Karcher (Karcher), as well as installing a special protective mesh.
Approximate issue price
Engine cooling radiator original Nissan (Infiniti): 41.000-48.000 non-original (China): 8000-14.000
Extensions for JoomlaI read the "five kopecks" reviews and went nuts, to be honest.
How can people actually publish on such machines, including me !?
I own a car for more than a year, I’ll say it wasn’t new right away. I did not have any problems and breakdowns for a year of ownership and almost 20t.km of run. Judging by the order of the outfits that he gave me with the car, the previous owner also did not have it. There were standard ones like everyone else: a power window motor, a revocable program on the timing chain and rear levers(on which there is a rack) and that's it. And then, according to the owner, he changed them because they offered to change them, and not because something broke.
In general, I want to add on my own that the car is very large, comfortable and roomy. I have 7 seats, I thought that it would not be very comfortable with the captain's seats, but I don’t feel any discomfort from this, since there are rarely more than 3 people in the car, and if it happens, then an adult will sit quietly in the third row. Noise isolation is very, very good, even in winter on the thorns. The engine is very powerful and dynamic. Easily accelerates the car both from a standstill and on the move, even after 140, when you need to quickly maneuver, overtake, etc.
Disadvantages ...
The car cannot be called soft and imposing. The suspension is short and knocked down. Irregularities are sensitive, shocking. But for that there is no side swing of the rear of the car like the 200th. And the car stands on the road like a glove. The fact is that the air suspension works both for leveling the car under axle load, and for the stiffness and travel of the suspension depending on the style and speed of the car. It does this automatically, there are no adjustments like the Lexus. And of course, if you are walking along the highway at a speed of 120 and suddenly hit the ground or the road being repaired, the suspension works hard and fulfills all the irregularities. When you start driving on a dirt and uneven road, the car moves in a completely different way and at a speed of up to 100 km / h goes acceptable without much shaking and unbearable overcoming and driving on such a road. Large overhang front bumper, always urges the driver to be careful, exit from public roads and park at high curbs. The car is big and ground clearance good, but this bumper is certainly annoying. He eats a car moderately, up to 120 on highway 13.5, in the city without races 18-20. If the bulk then there is no limit ...
No malfunctions. Mileage 60t.km and so far only scheduled maintenance. Advice to those who want to buy such a car: take cars with a transparent history and proven mileage. And not from outbids with supposedly mileage of 50t.km, in fact, with a mileage of up to 200t.km and you will not have any problems. My acquaintances drive on patrols (in fact, the same car), and their runs have already reached 200 thousand and did not do anything special for investments. Looking at them, I bought myself, but only in my opinion more brutal and prettier looking than the same patrol.
Indeed, the engine of this Infiniti QX56 "troit" when idling. The check engin (Service Engine Soon) is on, and, with an increase in speed, the check engin light sometimes starts blinking. The engine, of course, "does not spin up". The catalysts have been removed. Gasoline consumption, according to the client, has grown significantly. We "sin" on the alarm with auto start, but after checking this version we sweep aside.
We involve Nissan Consult III + and an experienced diagnostician to solve the problem. Nothing saying error P0300, about multiple misfires in all cylinders. There are no more mistakes. We change the candles - nothing changes, the P0300 is still there and the engine is shaking at idle. Pay attention to the lean mixture in the engine - this parameter allows you to see the computer. We check the fuel pressure in the rail - everything is within tolerances. At the same time, the diagnosis of misfire on the cylinders gives a strange result: in some cylinders, everything is more or less normal 20-30 passes, and in some 100 or more.
We connect the flushing of the fuel injectors and wash the injectors, as usual with chemistry. It doesn't get better after chemistry, but the picture changes. Those cylinders, where there were few passes, earned better, in the rest the picture did not change.
Resolved: remove fuel injectors for further diagnostics and repairs. In the preliminary chambers, everything is overgrown with soot:
As it turned out, the injectors were not removed in vain. Even after cleaning the injector, the nozzle openings, overgrown with soot, coked up, were not cleared.
We consider cleaning nozzles in ultrasound as dangerous for nozzles: during the cleaning process, under the influence of short waves, the saddle is broken by a needle. After such cleaning, the nozzle can be thrown away half the time. And we had a case when a client "in a friendly way", somewhere, twice cleaned the nozzles with ultrasound during the usual maintenance (the mileage was 40 thousand km). After that, he barely made it to us. The result is the replacement of the injectors.
Therefore, we will clean the nozzles with chemistry. If "takes" - lucky, does not "take" - we will change. We put the nozzles in a bath with a hellish mixture of decarbonization for the engine, liquid for washing nozzles, add acetone. We leave for a day.
We do not wait for it to be washed, we want to check if the injectors are working. To do this, we borrow used, but certainly working, nozzles from a friendly Infiniti dealer. We put them. We start up - everything is perfect. So the matter is really in the nozzles.
After a day, the nozzles were not washed. Outwardly clean, in fact, they are clogged from the inside. No amount of brushes, spells, compressed air helps.
This is a macro shot of the nozzle:
The stand for washing and checking the injectors is not suitable. It is designed for conventional fuel injectors, and we are dealing with high pressure direct injection injectors. The pressure is completely different, and the control system is different. With his help, we found a nozzle that was flowing. But here is another case.
We are trying to put the washed injectors on the car. We start up - everything is the same. The engine shakes, barely revving up. We make a decision with the owner to replace the nozzles with new ones.
New injector view:
The injectors were replaced. The engine started working like a clock.
Injectors are not the only problem on which the VK56VD engine may not work correctly. Our arsenal has experience in finding and eliminating other causes of uneven engine operation.
The key to success in renovation unstable work Infiniti QX56 (QX80) engine is of course diagnostics! Moreover, "I have already been diagnosed in another service" - the phrase is about nothing! You never know what qualifications a diagnostician has, what kind of computer?
In diagnostics, in addition to the equipment, which, of course, must be the most modern and appropriate to the car brand, the human factor plays the first fiddle! It is the specialist who decides what is important and what is not, where is the reason, and where is the effect. He, not the computer, finds the problem.
In our technical center, traditionally strong diagnostics, we find something with which the owners have been suffering for more than one month, bypassing the services of Moscow and the surrounding area.
Despite its brutal appearance, the Infiniti QX56 requires careful and careful attitude ... Why is this luxury SUV not included in the list of models popular with hijackers, and CASCO insurance does not frighten with conditions and numbers?
The answer about the elusive Joe, which no one wants, does not count. Are there any other options? No? Well then, let's try to see how the QX56 is in operation.
CERAMICS AND LIFE
This largest Infiniti is, to put it mildly, very exotic. His full mass only a couple of hundred kilograms falls short of category C, that is, three and a half tons. Its only possible motor contains more than three hundred "horses". It has a frame and a low gear in the transfer case, but all suspensions are independent. In general, something similar to the military truck GAZ-66, which has turned into a dead-end branch of development. Nevertheless, the QX56 has something in common with the notorious "shishiga": they both rarely throw their skates just like that, out of the blue. They signal for a long time with sounds, knocks, smudges, twitching, burning lamps (yes, and the "sixty-sixth" has a couple of control lamps) that it is time to surrender to good hands for repair.
A 5.6-liter V8 petrol engine with a dump torque of 529 Nm accelerates the car to a hundred, according to the stated data, a little less than 8 seconds. It eats, however, while in the city about 26 liters per hundred kilometers, and on the highway in a quiet mode - about 15-16 liters. And the oil consumption when driving at high speeds or with a heavy load - say, when towing a trailer - can easily turn out to be such that it simply won't be on the dipstick by the next replacement.
The design of the motor has no weak points, but there is a reason why the engine can become completely unrepairable: from low-quality gasoline, the front catalysts crumble into ceramic dust. Once inside the engine, she “picks up” everything she can reach. This dust cannot fly anywhere, because there are rear catalysts in its path, which it also clogs. So if the diagnostics give errors on the lambda probes, you must immediately change all four catalysts or install a tuning exhaust system Stillen where there are no catalysts. Any of these options with work will cost a little more than 100,000 rubles.
If the engine pulls poorly, then most likely the gas pump has begun a protracted agony. The reason is the same dirty gasoline and frequent trips with low level fuel.
REDUCE HALF AXLE
By drive type QX56 - versatile SUV... Under normal conditions, the moment is obtained rear wheels... I must say that all copies officially supplied to Russia since 2007 were all-wheel drive. Well, if there is no switch for Auto 4WD, 4H, 4L modes in the cabin, then we have a mono-drive "American" in front of us.
How transfer case and the automatic gearbox are quite reliable. True, the "machine" may fail due to current hoses: a characteristic weakness- at the point where rubber meets metal. There were also complaints about the buggy switch for selecting the transfer modes.
More serious problems can arise with the front axle: destruction of the gearbox, twisting of the axle shaft, as a rule, on the right, and falling out of the left. It is believed that this is provoked by abrupt starts in 4H or Auto mode with inverted wheels. What is it worth to a powerful motor to twist an iron stick into a ram's horn?
The cardan joints are impressively thick and come with replaceable crosspieces, but the front crosspieces are only supplied complete with a shaft.
Suspensions have a good resource, with the exception of struts and bushings front stabilizer, which in our conditions can withstand 20-40 thousand km. With a run of a little more than a hundred, it's time to update the shock absorbers, and a little later the rear hubs will probably hum (change assembly). In the steering, power steering hoses require attention - it happens that they leak.
REAGENTS AND MORE
QX56 also has a number of characteristic sores. For example, due to oxidized contacts in the engine compartment, the operation of the engine control unit is disrupted. Also, Russian chemistry finishes the rear air conditioner pipes and the tailgate lock. In winter, the car may not be allowed inside due to freezing door handle cables. In copies of the first years of production, the air conditioner radiator fan, located directly behind the radiator grill, is jammed, which can cause the wiring harness to burn out. Moreover, this problem is also known in America, so the reagents should not be blamed. The deicing slurry is innocent in the current radiators of the cooling system. They get clogged with dirt and burst from, simply put, local overheating. Regular washing is a guarantee of a long service life of this part. True, one cannot do without partial dismantling, because the main radiator is located tightly behind the radiator of the air conditioner.
