Engine Nissan X‑Trail 2 liters became one of the most popular power units on two generations of an SUV at once. The gasoline naturally aspirated engine of the MR20DE series can be found not only on Nissan models, but also under the hood of many Renault cars, where the engine is called the Renault M4R. An in-line 4-cylinder 16-valve engine has both pros and cons. Today we will talk about everything in more detail. 
Engine device X‑Trail 2 liters
The in-line 4-cylinder 16-valve X‑Trail gasoline engine has an aluminum cylinder block. Timing chain drive, there is a system for changing the valve timing with a phase shifter on the intake camshaft. There are no hydraulic lifters in the cylinder head. The valves must be adjusted manually by selecting pushers-washers of different thicknesses. After 140,000 - 150,000 kilometers, some engines have piston rings and oil consumption exceeds a liter per thousand kilometers. Replacing rings is quite expensive, so carefully monitor the quality of the fuel and choose high-quality engine oil.
Engine cylinder head Nissan X Trail 2 liters
Nissan X-Trail block head made of aluminum alloy. Two camshafts rotate in the bearing housing, which press their cams directly on the valves through special pushers. The camshafts are not attached by separate covers, but by a common pastel. Candle wells have very thin walls, an excess of force when tightening the candles leads to cracks in the cylinder head. And this, in turn, is leaking antifreeze. Repair of such a head is not possible, only replacement. The mechanism for changing the valve timing on the intake shaft is implemented using a hydraulic system. An increase in pressure causes an increase in the deviation of the camshaft from the nominal position relative to the valve axes. The oil pressure level is controlled by a solenoid valve controlled by the electronics of the X-Trail engine.
Timing drive Nissan X trail 2 liters
Timing drive X‑Trail 2.0 chain. Two chains. One larger one rotates the camshaft sprockets, the second small oil pump sprocket. With intensive use, the chain begins to stretch after 100,000 runs. This leads to a phase shift that even the automation that controls the phase shifter cannot correct. With a strong stretch of the chain, an error occurs in the operation of the phase shifter, and it becomes quite difficult to start the car on a cold one. The timing diagram is further in the photo.
Characteristics of the engine Nissan X‑Trail 2 liters
- Working volume - 1997 cm3
- Number of cylinders - 4
- Number of valves - 16
- Cylinder diameter - 84 mm
- Piston stroke - 90 mm
- Timing Drive - Chain (DOHC)
- HP power (kW) - 144 (106) at 6000 rpm in min.
- Torque - 200 Nm at 4000 rpm. in min.
- Maximum speed - 183 km / h
- Acceleration to the first hundred - 11.1 seconds
- Fuel type - gasoline AI-95
- Fuel consumption in the city - 11.2 liters
- Combined fuel consumption - 8.3 liters
- Fuel consumption on the highway - 6.6 liters
In the “square” body of the previous generation T31 crossover, the engine develops 137 hp. The current version of the Nissan X-Trail in the back of the T32 with the same engine develops 144 hp.
19.09.2018
Nissan Qashqai in Russia fell in love for two things: the price at the start and simple motors. The circulation of the model, despite the boring and frankly rustic body design, the circulation was impressive: in the first year, the Japanese sold more than 15,000 cars in Russia. With the advent of restyling, the figure increased, and in total, until 2013, more than one and a half million copies were sold worldwide, so the early Qashqai concepts of the current generation made it possible to predict high sales of the upcoming novelty. In general, it happened: after the premiere, the second generation diverged even better than planned, but six months later, the situation changed dramatically. The range of Qashqai engines has never been too wide, it included proven and reliable units, while quite technologically advanced and economical, which had a positive effect on interest in this crossover.
The 1.2-liter engine for the model turned out to be one of the most popular in terms of a combination of factors: it was he who debuted for the first time along with a new body, and configurations with it are much cheaper than 1.6- or 2-liter counterparts. In addition, most of these units are complemented by a mechanical 6-speed gearbox. If you believe the data of official dealers, with 1.2 liters, the Japanese-French concern Renault-Nissan managed to survive 115 horsepower and 190 Newton meters of torque paired with a manual gearbox and 165 Newtons with a CVT. The usual automatic transmission, by the way, is not offered for the model.
On paper, everything is very good: consumption up to 7.8 liters in the urban cycle, ridiculous, for a crossover, CO2 emissions into the atmosphere of 144 grams per kilometer, 11-second acceleration to the first hundred, top speed of 185 km / h - everything is cool. But, according to the reviews, this situation is relevant only for the spherical Qashqai in a vacuum. Many, especially owners of CVT configurations, complain about sluggish dynamics, a fairly large consumption for such a motor volume and a useless fifth gear in a manual gearbox: there is practically no difference between gear ratios of 0.763 and 0.638. Perhaps, if the driver is alone, then the indicators are close to paper ones, but crossovers, as a rule, carry 3-4 people and decent luggage.
The new Qashqai 1.2-liter turbo engine is a typical representative of the downsizing that is so popular at the present time. Especially with the variator.
It is too early to talk about serious malfunctions: the motor appeared on the market not so long ago, which means that it has not yet passed the full test of time. From the obvious, only a low resource can be called, since a small-capacity power unit produces its maximum power and torque at high speeds when the turbine swells, which is why it is subjected to increased heat. Most likely, after 150,000 kilometers, the turbine will become unusable, and the power unit will need a major overhaul. The reviews also reported on the exactingness of HRA2 to the quality of the fuel being poured: as soon as one of the owners refueled with low-quality 95th gasoline, the lambda sensor failed and the car stopped driving. The problem was solved by replacing the faulty sensor.
2.0MR20
This power unit is similar to the previous layout: it is also 4-cylinder and in-line, has 4 valves per cylinder. He, if we take into account the totality of generations of Qashqai, has proved to be one of the most popular engines among Nissan crossovers over the past 10 years. It is for him that all transmission options are offered: mechanical or CVT, with 2 or 4-wheel drive. But it will not work to call it economical: even on paper, the consumption in the most humane urban cycle exceeds 10.5 liters, and carbon dioxide emissions are equal to 178 grams per kilometer. But acceleration to 100 km / h takes a little less than 10 seconds, and the maximum speed is 194 kilometers per hour, which is ensured by a return of 144 horsepower and 200 Newton meters of torque.
Persons who have tried the Qashqai 2.0 engine and a 1.2-liter analogue noted a clear superiority in the first variant in traction. Long-distance travel enthusiasts especially noted this advantage: in their opinion, the combination of a manual transmission and the MR20DE engine provides confidence during fast driving, and is also able to provide comfortable overtaking at speeds up to 140 km / h. In addition, the consumption in the extra-urban cycle exceeds the performance of the supercharged version by less than a liter, and is 6 liters of 95 gasoline per 100 kilometers. Comfortable. Power units with the aforementioned index are also loved for reliability. Is it as phenomenal as the owners say?
The Qashqai MR20DE engine is a proven gasoline unit familiar from the previous generation, as well as the older X-trail model
First of all, it is worth remembering the fragility of the cylinder head. Because of the thin walls between the cooling system and the spark plug wells. Because of this, it is not difficult to damage the small aluminum “wall” between them, it is enough just to exceed the required force by a few newton meters. Every 100-150 thousand kilometers it is necessary to change the timing chain tensioners, as they fail and the chain stretches. This will be noticeable by the loss of power and the characteristic sound. You should also monitor the cleanliness of the throttle valve, try not to overheat the engine and fill in only high-quality oil every 10-15 thousand kilometers (according to the instructions, this is Elf 5W30). With proper care, the power unit can travel up to 300,000 kilometers. Information that someone "ran" could not be found anymore.
The Nissan company is famous for creating high-quality and budget units. We are talking here not only about the cars of the concern, but also components for them. So, the Japanese motors are one of the aspects of their activity, which allows them to popularize their products around the world and form a considerable army of fans around them.
A well-thought-out concept and its competent implementation are the key to the success of almost all Nissan engines.
ATTENTION! Found a completely simple way to reduce fuel consumption! Don't believe? An auto mechanic with 15 years of experience also did not believe until he tried it. And now he saves 35,000 rubles a year on gasoline!
In today's material, we will consider the motor of an automaker with the name "MR20DD". Its history, design features and operating principles can be found below.
Motor history
At the turn of the 20th and 21st centuries, the Japanese concern Nissan faced an urgent need for the design and subsequent production of new generation engines. If everything was going well with engines for premium-class models, SUVs and sports cars, then budget cars were in need of new power plants. The old internal combustion engines were simply outdated and were uncompetitive in the market.
During the noted period, the Japanese designed several fairly successful and high-quality series of engines. One of them was the joint development of the Nissan-Renault alliance called "MR".
ICEs from this line were able to make up for the existing problems in budget and middle class models, which are still being used. The similar success of the MR engine range is largely due to its good functionality, low price and excellent quality.
The unit under consideration today - MR20DD, is a typical representative of the series. You can understand its general concept if you decipher the name. The abbreviation "MR20DD" stands for:
- MR is a series of gasoline in-line engines developed by Nissan together with Renault.
- 20 - the volume of the engine in deciliters (if you round it up, you get its standard 2 liters).
- D - DOHC gas distribution system with two camshafts and 4 valves per cylinder, also capable of changing phases based on the engine stroke.
- D - power supply system with smart direct fuel injection into the cylinders (typical injector).
The MR20DD motors do not have special structural subtleties. They are made mainly of aluminum, are in-line and run on gasoline. MR20DDs are produced exclusively in atmospheric variations, so there is no need to find their turbocharged samples or try to "turbo" these engines on your own. Do not forget about their budget and purpose for inexpensive car models.
Representatives of the "MR" line marked "20DD" began to be produced by Japanese Nissan dealerships since 2005. As noted earlier, the production of units continues to this day. Mostly, MR20DDs were installed in two Nissan models - Qashqai and Q-Trail. In limited series, these engines can be found in other "state employees" of the Japanese and Renault cars.
Note! A more famous motor from the MR line is the MR20DE. Its main difference from the engine considered today is the power system.
The MR20DE has electronic distributed injection (in front of the valves), the MR20DD has direct injection directly into the cylinders. Otherwise, the designs of these internal combustion engines are identical.
Technical characteristics of MR20DE and the list of models equipped with it
| Manufacturer | Nissan (divisions - Yokohama and Busan Plant) |
|---|---|
| Motor brand | MR20DD |
| Years of production | 2005-present |
| cylinder head (cylinder head) | aluminum |
| Cylinder block | aluminum |
| Turbine | not installed in stock |
| Nutrition | injector |
| Construction scheme | in-line |
| Number of cylinders (valves per cylinder) | 4 (4) |
| Piston stroke, mm | 90.1 |
| Cylinder diameter, mm | 84 |
| Compression ratio, bar | 10.2 |
| Engine volume, cu. cm | 1997 |
| Power, hp | 133-147 |
| Torque, Nm | 191-210 |
| Fuel | gasoline (AI-95) |
| Environmental regulations | EURO-4 |
| Fuel consumption per 100 km | |
| - city | 11 |
| - track | 7 |
| - mixed mode | 9 |
| Oil consumption, grams per 1000 km | 500 |
| Volume of oil channels, l | 4.6 |
| Grease filling volume when replacing, l | 4.2 |
| Type of lubricant used | 0W-30, 5W-30, 10W-30, 5W-40, 10W-40, 15W-40 or 10W-60 |
| Oil change interval, km | 10-15 000 |
| Engine resource, km | 350 000-500 000 |
| Upgrading options | available, potential - up to 180 hp |
| Equipped Models | Nissan X-Trail Nissan Qashqai Nissan Teana Nissan Sentra Nissan Serena Nissan Bluebird Sylphy Nissan NV200 Renault Samsung SM3 and SM5 Renault Clio Renault Laguna Renault Safrane Renault Megane Renault Fluence Renault Latitude Renault Scenic |
More specialized technical information about the MR20DD engines and their operation can be found on the official Nissan website by the serial number of a particular unit.
It is located on the left side of the cylinder block, not far from its junction with the gearbox. At first, finding the serial number of the engine will not be easy, but by clearing the area of \u200b\u200bits location from pollution, you can significantly speed up the search.
Repair and service
The MR20DD, like many Nissan engines, is a quality unit. At the moment, reviews of its exploiters are often positive. It is not uncommon to meet the MR20DD with a resource of more than 300,000 kilometers. The engine in question has typical malfunctions, but they appear only when used improperly and ignoring the general maintenance rules. Having committed such misconduct, the owner of a car with an MR20DD should prepare for:
- increased oil consumption due to problems with either the oil system or oil scraper rings;
- premature stretching of the timing chain, accompanied by a noticeable hum when the engine is running “cold”;
- floating speed due to problems in the fuel system.
The noted malfunctions are relatively simple, cheap and quickly eliminated, in contrast to the cracking of the cylinder head. Periodically, it happens precisely in the MR20DD due to excessive tightening of the spark plugs. This should not be allowed, otherwise a forced and expensive trip to the service station cannot be avoided.
As for tuning the MR20DD, it is irrational and will cost a lot of money. Chip-tuning of this installation will not significantly achieve anything. For more or less good results, you will need to install a turbine and strengthen the CPG.
Such an upgrade will cost a lot, but the “exhaust” from it will not be significant - a maximum of 180-190 horsepower. Is it worth improving the MR20DD or not, how rational is it? The answer is unequivocal - no, it’s not worth improving, nothing good and worthwhile will come of tuning the motor.
Back in 1933, two well-known corporations merged: Tobato Imono and Nihon Sangyo. It is not worth going into details, but a year later the official name of the new brainchild was presented - Nissan Motor Co., Ltd.
And almost immediately the company starts supplying Datsun cars. As the founders said, these cars were created exclusively for Japan.
ATTENTION! Found a completely simple way to reduce fuel consumption! Don't believe? An auto mechanic with 15 years of experience also did not believe until he tried it. And now he saves 35,000 rubles a year on gasoline!
Years later, the Nissan brand is one of the leaders in the design and sale of cars. The well-known Japanese quality is clearly expressed in each copy, in each new model.
History of the Nissan MR20DE engine
The power units of the Nissan company (the country of Japan) deserve separate words. These are engines with a long service life, are quite economical, comply with generally accepted environmental standards, and are inexpensive to maintain and repair.
Large-scale production of MR20DE motors began in 2004, but some sources claim that 2005 will be a more accurate figure. For a long 13 years, the production of units has not been stopped, and today continues to function properly. According to numerous tests, the MR20DE engine firmly occupies the fifth position in terms of reliability throughout the world.
Installation sequence for various company models:
- Nissan Lafesta. A classic, comfortable minivan that saw the world in 2004. The two-liter engine has become an ideal unit for the body, the length of which was almost 5 meters (4495 mm).
- Nissan A model quite similar to the previous representative. Nissan Serena is a minivan, the configuration of which included the installation of both rear-wheel drive and all-wheel drive.
- Nissan bluebird. The car, which began production in 1984 and received a lot of changes from 1984 to 2005. In 2005, the MR20DE engine was installed on sedan bodies.
- Nissan Qashqai. Which was presented to society in 2004, and only in 2006 began its mass production. The MR20DE engine, with a volume of 0 liters, has become the ideal basis for a car that is produced in various equipment and up to the present day.
- Nissan X-trail. One of the most popular crossovers, which differs from models from other manufacturers in its compactness. The development of the Nissan X-trail was carried out back in 2000, but in 2003 the car had already received its first restyling.
It can be said that the MR20DE engine, reviews of which are only positive, is a public property, since in addition to the above models, it was also installed on Renault cars (Clio, Laguna, Mégane). The unit has established itself as a reliable and durable engine, with rare malfunctions, mainly due to low-quality components.
Specifications
To understand all the capabilities of the engine, you should find out its technical characteristics, which are summarized in a table for greater ease of understanding.
| brand | MR20DE |
|---|---|
| engine's type | inline |
| Working volume | 1997 cm3 |
| Engine power relative to rpm | 133/5200 137/5200 140/5100 147/5600 |
| Torque vs RPM | 191/4400 196/4400 193/4800 210/4400 |
| Number of cylinders | 4 |
| Number of valves | 16 (4 per 1 cylinder) |
| Cylinder block, material | Aluminum |
| Cylinder diameter | 84 mm |
| piston stroke | 90.1 mm |
| Compression ratio | 10.2 |
| Recommended fuel octane rating | 95 |
| Fuel consumption: | |
| - when driving in the city | 11.1 l. per 100 km. |
| - when driving on the highway | 7.3 l. per 100 km. |
| - with a mixed type of driving | 8.7 l. per 100 km. |
| Engine oil volume | 4.4 liters |
| Oil tolerance for waste | Up to 500 grams per 1000 km |
| Recommended engine oil | 0W-30 5W-30 5W-40 10W-30 10W-40 10W-60 15W-40 |
| Change of oil | After 15000 km |
| Working temperature | 90 degrees |
| environmental norm | Euro 4, quality catalyst |
It should be clarified that with modern oil, it must be replaced more often. Not every 15,000 km, but after 7,500-8,000 km. The grades of oil most suitable for the engine are indicated in the table.
There is also such an important parameter as the average service life, which is not indicated by the manufacturer regarding the MR20DE internal combustion engine. But, according to numerous reviews on the network, the operating time of this unit is at least 300,000 km, after which it becomes necessary to carry out a major overhaul.
The engine number is located on the cylinder block itself, so replacing it may be accompanied by some difficulties due to the registration of the unit. 
The number is located below the protection installed on the exhaust manifold. A more accurate guide can be an oil level dipstick. When buying a used car, not all drivers immediately find it, as the number can be hidden under a layer of rust.
Engine Reliability
It is known that the MR20DE power unit has become a reliable replacement for the well-known QR20DE, which has been installed on cars since 2000. The MR20DE has a longer service life (overhaul only needs to be done after 300 km), as well as better draft properties.
Of the design features:
- There are no hydraulic lifters. That is why, with the sudden occurrence of knocking, it is necessary to immediately adjust the valve clearances. Of course, the motor will work anyway, but it's best to spend a few washers, most often used for adjustment, and not reduce the life of the unit. A phase regulator is also installed on the intake shaft.
- The presence of a timing chain. Which, on the one hand, is good, but on the other, it means there are additional problems. For example, with today's diversity of automotive parts manufacturers, it is very difficult to find true quality. Very often, a timing belt replacement may be required even after 20,000 km.
- Camshaft lobes and crankshaft journals. Such a constructive solution allows to reduce the internal resistance of the motor and improve both its draft and speed qualities.
- The throttle is controlled by an electronic unit, and multi-point injection should also be highlighted.
The list of the most common malfunctions for this motor is very small and includes such problems in which the driver can not only get to the house or service center, but also drive more than one hundred kilometers, a quick engine replacement is not required. Only if the control unit has not failed.
But, it should be remembered that this unit, the reliability of which is quite high, was created exclusively for a calm and measured ride. Tuning to enhance its technological qualities will not work. For example, even installing a turbine will lead to the need to digest the manifold, purchase a reinforced BPG, install a more powerful fuel pump, and many other improvements. After installing the turbine, the engine power will increase to 300 hp, but its resource will be significantly reduced.
List of the most common faults and methods for their elimination
As mentioned earlier, on an injection car with an MR20DE engine, there are practically no problems in which the driver cannot reach his destination or the nearest service station and an urgent system overhaul will be required. But still, you should prevent a malfunction in time, or, if it occurs, do not put off repairs indefinitely. Self-diagnosis is not always a good way out of the situation.
Float problem
It often occurs even on new cars, the mileage of which has just crossed the 50,000 km mark. Floating speed is most pronounced at idle, and many car owners, without straining, immediately take the car to a minder or a repairman for injector systems. But do not rush, just remember the device of the MR20DE unit.
This engine is equipped with an electronic throttle, on the damper of which, over time, carbon deposits form. As a result - insufficient fuel supply and the effect of floating speed. The way out is the simple use of a special cleaning liquid, which is sold in convenient aerosol cans. It is enough to apply a thin layer of liquid on the throttle assembly, leave for a few minutes and wipe with a dry cloth. The manual has a detailed description of this operation.
Motor overheating
The problem is frequent, due to insufficiently high-quality electronic components, and not to the fact that the cooling system has failed: a thermostat, a pump (the pump is extremely rarely replaced) or an idle speed sensor. Overheating the engine will not cause it to stop, the ECU will simply reduce the speed to a certain level, which will also cause a loss of power.
This happens due to the fact that the air flow sensors do not work correctly, or rather, the thermistor, which is part of them. Very often, the temperature sensor can increase the reading by exactly half, which the system perceives as overheating of the engine and forcibly reduces its speed. For high-quality and correct operation of the system, the thermistor must be replaced.
Increased oil consumption
Maslozhor many perceive as the onset of the moment when it is necessary to make an expensive overhaul of the engine. But you should not rush, as the reason for this may be piston rings or valve stem seals, the service life of which has come to an end. Then, in addition to increased oil consumption, deposits can also form on the inner surface of the cylinder or where the pistons are located. The compression ratio in the cylinders is reduced.
The characteristics indicate the permissible oil consumption for waste, but if the engine consumes oil much more, then measures should be taken. Replacing rings, a set of which is not too expensive, will require the involvement of specialists from a quality service station. Before replacing, it is necessary to perform such an operation as raskosovka - cleaning the piston rings from soot, and after that - check what compression is in the cylinders.
Timing chain stretch
It can be confused with a clogged throttle, because the symptoms are exactly the same: uneven idling, sudden failures in the engine (which are similar to the failure of one of the spark plugs), reduced power characteristics, knocking during acceleration.
The timing chain needs to be replaced. The price of the timing kit is quite affordable, but you can also buy a fake. Replacing the chain is fast, the cost of the procedure is not high.
The appearance of a sharp and unpleasant whistle
The whistle becomes pronounced on an insufficiently warmed-up engine. The sound gradually decreases or disappears completely after the motor temperature rises. The reason for this whistle is the belt that is installed on the generator. If outwardly no defects are visible on it, then the alternator belt can simply be tightened where the flywheel is located. If sprains or cracks appear, then the alternator belt is best replaced with a new one.
How to change spark plugs
The above malfunctions are not terrible if they are eliminated in time. But such a simple operation as the torque of the spark plugs can be a real tragedy, after which it is necessary to replace the cylinder head chain or belt.
Tighten the spark plugs on the MR20DE motor only with a torque wrench. The force of 20Nm must not be exceeded. If more force is applied, then microcracks may occur on the threads in the block, which will cause tripling. Together with engine tripping, which increases in proportion to the kilometers traveled, the head of the block can be covered with coolant, the car works in jerks, especially when HBO is installed.
Therefore, it is necessary to use a torque wrench. And it is best to change the spark plugs on a cold engine.
What oil is best to fill in the engine
In order for the resource of the MR20DE engine to correspond to the data specified in the technical documentation, all consumables should be changed in time: oil and fuel filters, as well as oil. The oil pump should also be checked periodically. In addition to replacing consumables, the valves should be periodically adjusted (for a long service life, they should be adjusted every 100,000 km).
The MR20DE motor manufacturer advises using only high-quality oils, such as Elf 5W40 or 5W30. Of course, along with the oil, the filter also changes. Elf 5W40 and 5W30 have good viscosity and density and can last for a long time. But it is best not to change the oil every 15,000 km (as indicated in the technical description), but to do this operation more often - after 7500-8000 km and take care of the engine pan.
As for gasoline, it is better not to save money and fill the engine with fuel with an octane rating of at least 95, as the repair manual says. Also, now there are a large number of additives on the market that will save not only the fuel system, but also the life of the engine.
Which cars are equipped with the MR20DE engine
The MR20DE power unit is very popular and has been installed on the following car models:
- Nissan X-Trail
- Nissan Teana
- Nissan Qashqai
- Nissan Sentra
- Nissan Serena
- Nissan Bluebird Sylphy
- Nissan NV200
- Renault Samsung SM3
- Renault Samsung SM5
- Renault Clio
- Renault Laguna
- Renault Safrane
- Renault Megane
- Renault Fluence
- Renault Latitude
- Renault Scenic
The VAZ MR20DE engine was created as a high-resource lightweight power unit. The ICE marking is deciphered as follows:
- MR - a series with a chain drive and an aluminum block;
- 20 - volume of combustion chambers (x 0.1);
- DE - DOHC valve timing and electronic injection.
The designers used an in-line engine layout, inside the aluminum cylinder block there are cast-iron liners. The manufacturer himself positions such a design as a "disposable". In practice, 90% of domestic service stations overhaul engine cylinders without any problems.
By default, the manufacturer has installed the upper DOHC V16 gas distribution scheme in the engine. The most modern DIS-4 ignition system was used without a spark carrier and high-voltage beams - a separate coil for each candle. ICE vibrations are damped by a special balancing system inside the cylinder block.
The balance shafts are driven together with the oil pump by a short chain. Gear oil pump drive, rear exhaust manifold with catalytic converter integrated inside it.
VVT system
The manual contains a description of the operating parameters of the motor. If it indicates less than 140 liters. with., the user can increase the power by chipping without interfering with the mechanical part. The intake manifold is accordingly located at the front, providing more air for the fuel mixture.
The following MR20DE specifications apply to the basic version:
| Manufacturer | Yokohama Plant Nissan-Renault |
| ICE brand | MR20DE/M4R |
| Years of production | 2005 – … |
| Volume | 1997 cm3 (2.0 l) |
| Power | 98 - 108 kW (133 - 147 HP) |
| Torque | 191 - 210 Nm (at 4400 rpm) |
| Weight | 124 kg |
| Compression ratio | 10,2 |
| Nutrition | injector |
| motor type | in-line petrol |
| Ignition | DIS-4 |
| Number of cylinders | 4 |
| Location of the first cylinder | TVE |
| Number of valves per cylinder | 4 |
| Cylinder head material | aluminum alloy |
| Intake manifold | polymeric |
| An exhaust manifold | steel welded |
| camshaft | original cam profile |
| Block material | aluminum alloy |
| Cylinder diameter | 84 mm |
| Pistons | cast aluminium, full profile with high skirt |
| Crankshaft | cast iron |
| piston stroke | 90.1 mm |
| Fuel | AI-95 |
| Environmental standards | Euro 4 |
| Fuel consumption | highway - 5.3 l / 100 km combined cycle 6.6 l/100 km city - 8.9 l / 100 km |
| Oil consumption | maximum 0.6 l/1000 km |
| What kind of oil to pour into the engine by viscosity | 5W30, 5W40, 0W30, 0W40 |
| Which oil is best for the engine by manufacturer | Elf, Idemitsu Zepro, Mobil-1 |
| Oil for MR20DE by composition | Synthetic in winter, semi-synthetic in summer |
| Engine oil volume | 4.5 l |
| Operating temperature | 95° |
| ICE resource | claimed 150,000 km real 250,000 km |
| Adjustment of valves | mechanical pushers |
| Cooling system | forced, antifreeze |
| coolant volume | 7.1 - 7.7 liters depending on the brand of the car |
| water pump | Aisin WPN105, Dolz №150 |
| Candles for MR20DE | Denso PLZKAR6A-11, LZKAR6A-11 |
| spark plug gap | 1.1 mm |
| Valve train chain | roller multi-row, blue and orange label |
| The order of operation of the cylinders | 1-3-4-2 |
| Air filter | Patron PF1553, Filtron AP185/5, Parts Mall PAE-006, Fenox FAI107 |
| Oil filter | VIC C-224, AY100-NS004 |
| Flywheel | cast-iron body, steel crown, teeth without gap, 6 holes for fastening bolts |
| Flywheel mounting bolts | M12x1.25 mm, length 26 mm |
| Valve stem seals | manufacturer Goetze, 13207-53Y00, inlet light graduation dark |
| Compression | from 13 bar, difference in neighboring cylinders max. 1 bar |
| Turnover XX | 675 – 725 min-1 |
| Tightening torque for threaded connections | candle - 19.6 Nm flywheel - 62 - 87 Nm clutch bolt - 19 - 30 Nm bearing cover - 34.3 Nm (main) and 27.4 Nm, loosening up to 0.19.6 Nm + 60 ° (rod) cylinder head - 6 steps 5 Nm, 13 - 17 Nm, 44 - 46 Nm + 90° + 90° |
As the lubrication system wears out, oil consumption increases by up to 1 l / 1000 km of run.
The joint development of the French brand Renault and the Japanese manufacturer Nissan - the MR20DE engine - has the following design nuances:
- lightweight aluminum block with wet cast iron cylinder liners;
- duralumin cylinder head with metal gasket;
- plastic intake manifold at the rear and steel exhaust manifold at the front;
- phase adjustment with a fluid coupling only on the intake camshaft;
- mechanical pushers instead of shims to adjust the thermal clearances of the valves;
- electric control of the throttle valve;
- gas distribution scheme DOHC upper two-shaft with 16 valves;
- mirror polished crankshaft journals and camshaft cams to reduce mechanical losses.
An exhaust manifold
Maintenance and overhaul is carried out with a minimum number of special devices.
List of engine modifications
The only type of power drive is MR20DD, which has structural differences:
- direct injection;
- a second VVTi fluid coupling on the intake camshaft;
- variable intake manifold geometry;
- torque 210 Nm;
- adaptation for gasoline AI-92;
- compression ratio 11.2;
- equipment for CVT variator;
- power 150 l. With.
Motor MR20DD
Such an upgrade allows naturally aspirated to achieve the characteristics of a turbocharged drive. No special mounted type of intercooler or straight-through spider is used here.
Advantages and disadvantages
In addition to the irreversible deformation of the valves during their impact by the pistons when the timing chain breaks, the disadvantages of the design are:
- tendency to carbon formation and increased oil consumption;
- the need for periodic do-it-yourself valve adjustment;
- overheating of the cylinder block.
Cylinder block MR20DE
A positive feature of the engine is a high resource of 350,000 km, subject to maintenance regulations. Other design features are:
- the manufacturer uses reliable attachments;
- it is possible to force by reinstalling the software;
- overhaul is quite feasible according to the manual on our own.
Intake manifold
In the modification of the MR20DD, the management of the Nissan-Renault Corporation retained the volumes of the combustion chambers, but tested the direct injection scheme. However, the software firmware is underdeveloped, instead of reducing fuel consumption, the opposite effect is observed.
List of car models in which it was installed
You can meet the MR20DE engine under the hood of the following Nissan models:
- NV200 - front-wheel drive minivan and van;
- Bluebird Sylphy - C-class sedan;
- Serena - Japanese and Spanish minivan;
- Sentra - export version of the sedan in three generations;
- Qashqai - Japanese crossover of European design;
- Teana - a business-class sedan with front-wheel drive / all-wheel drive;
- X-Trail is an SUV-style crossover.
Nissan Serena
Initially, the engine characteristics were suitable for cars of the second manufacturer of the ARN Alliance, Renault:
- Megane - coupe, convertible and hatchback;
- Safrane - liftback retro design;
- Laguna - three budget generations in standard bodies;
- Clio - youth SUV and station wagon;
- Samsung SM3 - Korean sedan under the Renault brand;
- Samsung SM5 - Korean sedan for the Middle East;
- Scenic - compact MPV 5 - 7 seater with front and all-wheel drive;
- Latitude - business class sedan of domestic and Korean assembly;
- Fluence is a front-wheel drive sedan of Turkish and Russian assembly.
Renault Clio
On Japanese cars, the motor was marked as standard MR20DE, and on French cars it was called M4R.
Service Schedule MR20DE 2.0L/140L. With.
Since the MR20DE engine contains several friction pairs with unequal resources, an individual maintenance schedule has been drawn up for it:
- it is recommended to fill in new oil after 7.5 thousand mileage along with the oil filter;
- the fuel filter from the factory is enough for 40,000 km, the air filter cartridge is changed annually;
- the timing chain resource is limited to 150 thousand mileage, the expert recommends changing it a little earlier;
- antifreeze loses its properties after 50,000 km, at the same time, the exhaust manifold may burn out;
- manufacturer's candles are designed for 20,000 runs, and the battery life is always determined by its manufacturer.
Timing chain replacement
Considering that the internal combustion engine device does not include hydraulic pushers, the thermal clearances of the valve drives should be adjusted every 30,000 km.
Overview of faults and how to fix them
Despite the high reliability of the roller multi-row chain, it still breaks at the turn of 150 - 160 thousand mileage. In that case, the MR20DE motor hopelessly bends the valve with a 100% probability. Other "sores" of the power drive are:
Motor tuning options
A budget chip tuning is capable of adding a little power to the MR20DE engine:
- the service station specialist reads the program of the on-board computer;
- uses a ready-made version of the software or creates a new firmware to disable a certain number of sensors or change the settings of actuators.
At the same time, tuning should take into account the physical wear of friction pairs, the real state of the motor, running and braking systems.
Tuning MR20DE
For the MR20DE, it is difficult to find SHPG, crankshafts and camshafts of other sizes, so atmospheric tuning is practically not used. Moreover, there are no turbo kits for it either, so you will have to select the characteristics of the components yourself. Supercharged tuning consists of the following:
- turbine plus intercooler;
- reinforced connecting rods and pistons;
- high-performance fuel pump and injectors;
- an increase in the diameter of the exhaust and a change in its scheme.
The firmware version will also have to be changed so that the ECU takes into account the nuances of the new engine design and architecture.
Thus, the MR20DE motor has high performance and resource. The unit can be serviced and repaired on its own without the involvement of manual specialists.
