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Review of the K9K engine of Renault Duster cars

Many Renault Duster and Renault Megane 2 cars are equipped with a K9K 1.5 DCI diesel engine with a volume of 1.5 liters and a power of 86 hp. Engine K9K Turbo – supercharged, in-line, liquid cooling, with four cylinders, with OHC gas distribution mechanism, located in engine compartment transversely

The cylinder head of a diesel engine is made of aluminum alloy. The cylinder head gasket is made of metal, making it more resistant to high temperature and pressure.

The cylinder block of the K9K engine of Renault Duster and Renault Megane 2 cars is cast from gray cast iron with already formed cylinder liners. At bearings crankshaft cast iron covers included in the block, including bolts.

Liners are inserted into both parts of the bearings. The liners have tongue locks and lubrication grooves along the central circumference. Camshaft The engine is installed in a bed of bearings made in the body of the head, and is secured against axial movement by thrust flanges.

The crankshaft of the K9K 1.5 DCI engine rotates in main bearings having thin-walled steel liners with an anti-friction layer. The axial movement of the crankshaft is limited by two half-rings installed in the grooves of the middle main bearing bed.

Oil channels to the bearings are drawn transversely (diagonally).

The flywheel, cast from cast iron, is mounted on the rear end of the crankshaft and secured with six bolts. A toothed rim is pressed onto the flywheel to start the engine with a starter.

The pistons of the K9K diesel engine of Renault Duster and Renault Megane 2 cars are made of aluminum castings. In the bottom of the piston on the side of the combustion chamber there is a recess with a guide rib, which ensures the vortex movement of the intake air and, as a result, very good mixture formation. A special cooling circuit ensures piston cooling during the exhaust stroke. Friction in piston group

reduced due to the graphite coating of the piston skirt. Rice. 1. Oil filter And oil heat exchanger

1 – oil filter bracket mounting bolt; 2, 10, 11 – sealing rings; 3 – engine oil filter Renault Megane 2; 4 – sealing ring heat exchanger; 5 – heat exchanger mounting bolt;

6 – heat exchanger; 7, 8 – oil pipelines; 9 – oil filter bracket
The piston pins of the Renault Duster diesel engine are installed in the piston bosses with a gap and are pressed with an interference fit into the upper heads of the connecting rods, which with their lower heads are connected to the crankpins of the crankshaft through thin-walled liners, similar in design

indigenous Because of the high maximum pressure

cycle, the diameter of the piston pin is increased. The connecting rods are steel, forged, with an I-section rod.

The connecting rod and its cover are made from a single piece and processed as one piece, after which the cover is chipped from the connecting rod using a special technology. As a result, the most accurate fit of the cover to its connecting rod is ensured. In this case, installing the cover on another connecting rod is unacceptable. Renault Duster engine lubrication system is combined. The oil from the oil sump is sucked into the oil pump, passes through the oil filter and is pressurized into the engine. Oil pump with valve

overpressure driven by a roller chain from the crankshaft sprocket. Under

crankshaft

In the K9K 1.5 DCI engine of Renault Duster cars there is an oil flap that prevents rapid oil overflow. The aluminum alloy engine crankcase is integrated with the front and rear covers and together with them is attached to the engine cylinder block. An oil heat exchanger 6 and an oil filter 3 are also embedded in the lubrication system (Fig. 1). An overpressure valve is also attached to the oil filter housing, providing the possibility of oil return bypass. The oil filter is equipped with a replaceable paper filter element. The K9K engine cooling system for Renault Duster cars is sealed, with

expansion tank, consists of a cooling jacket, made in casting and surrounding the cylinders in the block, combustion chambers and gas channels in the cylinder head. Forced circulation.

Coolant is provided by a centrifugal water pump driven by a crankshaft by a drive belt. auxiliary units coolant in the cooling system of the K9K Renault Megane 2 diesel engine, a thermostat is installed that closes a large circle of the system when the engine is not warmed up and the coolant temperature is low.

Turbocharging and exhaust gas recirculation system. The exhaust manifold is attached to the turbocharger flange with nuts. A turbocharger serves to increase air pressure using a turbine, which is driven by exhaust gases.

Turbine bearing lubrication included common system lubricants of the K9K engine of Renault Duster cars. The turbocharging system is complemented by an exhaust gas recirculation system.

The amount of exhaust gases supplied to the system is regulated by the exhaust gas recirculation solenoid valve, the cone-shaped pusher of which changes the cross-section of the bypass hole at different valve positions.

Supply system. Clean air is sucked into the cylinders of a Renault Duster diesel engine when the piston moves downwards. During the compression stroke, the pressure in the cylinder increases sharply, and the temperature in it becomes higher than the ignition temperature of diesel fuel.

If the piston is located before TDC, then diesel fuel is injected into the cylinder heated to a temperature of +700–900 °C, which self-ignites, so spark plugs are not required.

However, when starting the K9K 1.5 engine DCI Renault Megane 2 after a long period of inactivity (cold), especially if the air temperature is low, simple compression is often not enough to ignite the combustible mixture.

For this case, the combustion chamber is equipped with glow plugs, which are located so that a stream of fuel from the injector nozzle hits the hot tip of the spark plug and ignites.

The glow plugs are automatically turned on immediately before the starter is turned on. At the same time, a warning light turns on in the instrument cluster, and the glow plugs begin to heat up to high temperature.

The main purpose of heating candles is to ensure fuel ignition, injected into the cylinder. After heating the spark plug to the required temperature (usually this takes a few seconds), the warning light goes off and the K9K engine of Renault Duster cars can be started.

Typically, the higher the engine temperature, the faster the warning light goes out.

Immediately before starting the engine (or most often shortly after it), the glow plugs are turned off. In the majority they can continue to operate for up to several minutes after start-up to reduce the level of harmful emissions into the atmosphere when the engine is running cold, as well as to stabilize the combustion process in a not yet fully warmed-up engine.

Then the supply of current to the spark plugs stops. Thus, the starting of a diesel engine and its further operation directly depend on the correct operation of the glow plugs.

Fuel is supplied by the high-pressure fuel pump (HPF) of the K9K 1.5 DCI engine of Renault Duster cars directly from fuel tank.

In a fuel injection pump, fuel is compressed before injection and then supplied to the engine cylinders in the order of their operation. At the same time the regulator fuel pump measures fuel depending on the position of the gas pedal.

Through injectors, diesel fuel is injected at a certain point in time into the prechamber of the corresponding cylinder. Due to the shape of the prechamber (vortex chamber), the incoming air receives a certain turbulence during compression, as a result of which the fuel is optimally mixed with the air.

Before the fuel enters the K9K injection pump of Renault Duster cars, it passes through fuel filter, in which it is cleaned of dirt and water.

That is why it is important to replace the filter in a timely manner, according to the regulations.

The injection pump does not require maintenance. All moving parts of the pump are lubricated with diesel fuel. The injection pump is driven from the crankshaft pulley by a toothed belt.

Since self-ignition of the combustible mixture occurs in the K9K 1.5 DCI Renault Megane 2 diesel engine, an ignition system is not required, and a solenoid valve is installed in the injection pump. To stop a diesel engine, the voltage supply to the solenoid valve is interrupted and the valve closes the fuel channel, thereby stopping the fuel supply and stopping the engine. When the starter is turned on solenoid valve

voltage is applied and it opens the fuel channel.

Replacing the timing belt of the K9K engine of Renault Duster cars At every maintenance

K9K engine of Renault Duster cars, check the tension of the timing belt. If the belt is weakened, its teeth quickly wear out and in addition, the K9K Renault Duster timing belt may jump onto toothed pulleys

The manufacturer recommends checking the belt tension and monitoring it using a special strain gauge tester. In this regard, data on the force when the belt branch deflects by a certain amount in technical documentation none.

In practice, you can approximately estimate the correct tension of the K9K Renault Duster timing belt using the “rule of thumb”: press the belt branch with your thumb and determine the deflection using a ruler.

According to this universal rule, if the distance between the centers of the pulleys is from 180 to 280 mm, the deflection should be approximately 6 mm.

There is another way to preliminary check the tension of the Renault Megane 2 timing belt - by twisting its leading branch along the axis.

If you can twist the branch more than 90° with your hand, the belt is loose. These methods can only diagnose excessive belt loosening, so contact a service center to accurately check and adjust the tension.

The car is equipped with a Renault Duster timing belt tension roller with automatic adjustment.

The timing belt of the K9K 1.5 DCI Renault Duster engine must be replaced if upon inspection you find:

– traces of oil on any surface of the belt;

– traces of wear on the toothed surface, cracks, undercuts, folds and peeling of fabric from rubber;

– cracks, folds, depressions or bulges on the outer surface of the belt;

– fraying or delamination on the end surfaces of the belt.

A Renault Duster timing belt with traces of engine oil on any surface must be replaced, as oil quickly destroys rubber.

Eliminate the cause of oil getting on the belt (usually a leak in the crankshaft or camshaft seals) immediately.

Carry out work on replacing the timing belt on an inspection ditch, overpass, or, if possible, on a lift.

Operations for replacing the timing belt of the K9K Renault Duster engine:

Remove the right engine mount K9K Renault Duster.

Set the piston of the 1st cylinder to the TDC position on the compression stroke.

Unscrew the bolt securing the auxiliary drive pulley and remove the pulley. After unfastening the clamps, remove the lower cover of the Renault Duster timing belt. Using a hex wrench, loosen the fastening nut.

tension roller

and remove the timing belt.

The mark on the high pressure fuel pump pulley should align with the mark on the cylinder block.

Move the movable mark of the tension roller clockwise 7–8 mm further than the fixed mark.

Install the accessory drive pulley in the reverse order of removal.

Remove the pulley clamps camshaft and TDC.

Turn the Renault Duster crankshaft by the auxiliary drive pulley bolt six turns.

Loosen the tension roller nut no more than one turn while holding the roller with a hex wrench.

Align the movable mark of the tension roller with the stationary one and tighten the roller nut to a torque of 27 Nm.

To check the correct setting of the valve timing, set the piston of the 1st cylinder to the TDC position of the compression stroke.

Check that the marks on the camshaft and high-pressure fuel pump pulleys match the marks on the belt, as well as the marks on the high-pressure fuel pump pulley and the mark on the cylinder block. If the marks do not match, repeat the installation of the Renault Duster timing belt.

Install all parts in the reverse order of their removal.

Installing the piston of the first cylinder of the K9K 1.5 DCI Renault Megane 2 engine to the TDC position of the compression stroke:

Remove the right front wheel.

Remove the right front wheel arch liner.

Remove the four bolts securing the front subframe bracket to the body and remove the bracket.

Remove the accessory drive belt.

Remove the right engine mount of the Renault Duster.

Remove the bracket mounting bolts right support suspension of the power unit to the cylinder block and remove the bracket.

By rotating the crankshaft clockwise using the accessory drive pulley bolt, align the hole in the cylinder block with the hole on the camshaft pulley.

Remove the plug from the hole to install the TDC position clamp.

The plug is located to the left of the Renault Duster flywheel in the cylinder block at the level of the 1st cylinder.

To fix the camshaft, insert the clamp into the holes of the camshaft pulley and the cylinder block.

A French car, which, according to its characteristics, can rightfully be classified as an SUV.

It is produced only in a few countries, such as Romania, Colombia, Brazil and, more recently, Russia. A car was created with the BO (Logan) platform, combined with front-wheel drive. So far, a manual transmission has been offered for front wheel drive Russian market and with automatic transmission transmission

Like most real SUVs, it is equipped with a 1.5 diesel engine - liter engine, whose power is 90 Horse power. Distinctive feature The Renault Duster K9K engine's design is that, firstly, it is quieter than a gasoline engine when operating within the city, at 100 km/h, and secondly, if on a gasoline engine it is virtually impossible to start from second gear uphill without scorching the clutch, then diesel will carry you everywhere, of course, if the climb is not too steep. Yes, it accelerates a little slower than its gasoline counterpart, but here you can miss the gears and it will still pull through. Within the city, at fully loaded, 7.5-8 liters per 100 km is enough, and outside the city limits there is good economy - 6.5 liters per 100 km. Thirdly, the unique first gear replaces the lower gear, the car crawls along dirt road and up the hills, there would be something to cling to.

The diesel Duster is 58 kg heavier than the gasoline one and sways a little more on the ground, but it doesn’t matter, the shock absorbers will hold up.

Renault Duster can withstand our diesel fuel!

The design of the Renault Duster k9k engine is such that it does not allow a quick response to the gas and brake pedals. This is noticeable when high speed, but in urban conditions - no.

Engine service characteristics:

• Oil change every 10 thousand km, in accordance with technical note NT5342A engine k9k, – 4.5 liters.
• To change the oil you need a gasket and an oil filter.
• The air filter should also be changed every 10 thousand km.
• It is advisable to clean the air conditioner every 2 years.
• Fuel filter – 3 options:
• Regular 8200638748,
• With hole for fuel heating 164005033R,
• For water presence sensor 8200732750.
• Periodically, every 60 thousand km, replace the belt.
• Every 90 thousand km, replace the brake fluid.

Every time you replace the drive belt, change the pulley. All this must be done, even if you do not understand engines, when contacting a technical station. service.

Engine Specifications:

• engine type – diesel, 90 horsepower.
• Transmission - 6-speed, manual.
• drive - full or front.
• load-bearing steel body.
• pendants
• front independent, McPherson type,
• rear – spring multi-link, with stabilizer,
• Acceleration to 100 km/h in 15.6 seconds.
• Maximum speed – 156 km/h.
• Device brake mechanisms front wheels - disc, ventilated,
• rear - drum.
• Wheel track – 2673 mm.
• Fuel tank capacity – 50 l.
• Trunk volume – 408 l, folded rear seats– 1570 l.

Location of a huge number car lovers small turbodiesels have already conquered. Their key advantages include a high degree of efficiency, which can be compared with larger counterparts, and optimal cost. Renault became one of the first automobile factories, which began producing small diesel engines, the development of the fairly well-known 1.5 dCi was completed together with Nissan. Today, many cars are equipped with this engine.

The smallest of the range of diesel engines is power unit, designated K9K, it appeared on the market back in 2001. A 4-cylinder, 8-valve engine with a Common Rail fuel supply system and turbocharging was offered in several variations, the power of which varied from 64 to 110 horsepower. The key differences between the models are the flywheel, turbocharger, injectors, and so on. The advantages of the unit include a fairly high degree of power and low consumption fuel - approximately 6 liters per 100 kilometers.

The 1.5 dCi engine is often used in cars, Dacia and Renault. From 2003 to 2010 small SUV Suzuki Jimny was equipped with a turbodiesel, and after Renault began working with Mercedes, new A-Class models and the Citan van were also equipped with this engine.

The list of problems that plagued the 1.5 dCi is quite long. One of the most common and serious is a malfunction of the power system. As usual, this is due to the use of low-quality fuel, which French diesel is not able to tolerate. This is especially true for engines with Delphi injectors, which can withstand 10 thousand kilometers on low-grade diesel fuel. one injector costs approximately 8-12 thousand rubles. In models with “normal” nozzles and a simple system, you can save a lot by trying to restore their operation. If the injectors are piezoelectric, only replacement will help.

On some copies, the turbocharger can cause unpleasant moments after sixty thousand kilometers. Turbochargers were used in 2 varieties - with variable and fixed geometry.

It is quite common for pistons to burn out and liners to rotate due to incorrectly functioning injectors. In addition, you may encounter problems with the EGR valve that are typical for diesel engines. On versions that are somewhat more powerful, there are problems with the 2-mass flywheel. Another standard problem for a diesel engine is particulate filter, which may well require huge expenses. It is better not to talk about the price of a new one, but to pray so that the troubles that relate to it do not bother you. Sometimes difficulties are caused by the engine control electronics: the shaft position and boost pressure sensors are very vulnerable.

As you can see from the review possible problems with 1.5 dCi a lot. But most of them are associated with incorrect use. To eliminate significant and unnecessary expenses in the future, owners diesel cars it is necessary to compensate for shortcomings in one’s own knowledge, which were caused by the operation of exclusively naturally aspirated gasoline engines.

Many also consider the 1.5 dCi quite risky. But, it must be recalled that the majority of owners of cars with this turbodiesel are extremely satisfied with their purchase, and would like to see a 1.5 dCi engine under the hood of their iron “horse” in the future.

The K9K884 engine was the basis of all diesel versions of Duster crossovers belonging to generation I. The Renault Russia plant produced these cars until 2015. With the transition to generation II, the volume of the “diesel” remained equal to 1461 ml, but its parameters improved - power became equal to 109 hp. versus 90 “forces” in the past. Torque has also increased. We tried to find out what the traction chart looks like after 70,000 miles. Technical characteristics of Renault Duster with diesel engine known to everyone. But you need to know how they will change over time.

In 2012, the power was increased to 105 horsepower using chip tuning. The video shows one example.

Technical parameters of motors from different generations

Let's consider specifications diesel engines.

Diesel 90 “horses”

Under the hood of a diesel Duster with 90 horsepower

For all diesel engines installed on first-generation crossovers, the following values ​​were typical:

• Compression ratio – 15.7
• Power – 90 hp at 4000 rpm
• Maximum torque – 200 N*m at 1750 rpm (see photo)
• Environmental standards - Euro 4

Actually, most publications published one chart in 2011. You can see the same characteristics on it - 200 N*m and 90 horsepower (66 kW).

Torque and power, "90 hp" version

Diesel 109 horsepower

Under the hood of a diesel Duster with 109 horsepower

When restyling was carried out, almost every parameter was improved. What even applies to “ecology”:

• Compression ratio – 15.2
• Power – 109 hp at 4000 rpm
• Maximum torque – 240 N*m at 1750 rpm
• Environmental standards – Euro 5

Reducing the compression ratio means better fuel efficiency.

All technical characteristics of the Renault Duster diesel engine improved after restyling, but the working volume remained the same - 1,461 liters.

How does the torque graph change with engine wear on Renault Duster?

All Duster diesel engines are valued for the fact that maximum traction is achieved at low revs. We are talking about numbers less than 2000 rpm, and this is the main “plus”. But over time, that is, with increasing odometer readings, the maximum point shifts to the right.

Torque and power, “90 hp” version, mileage

From the graph you can understand what will happen to the K9K engine if it “runs” about 70 thousand km.

Features that were not present with “zero” mileage:

• The greatest traction force became equal to 204 N*m. Maybe the stand is “lying” (inflating the values). We will assume that the numbers remain the same - 200 N*m.
• Rated power decreased to 88 hp. But taking into account the “overestimation” of 2%, the power should be considered equal to 86.4 hp.

What exactly will be observed as the mileage increases?

At a mileage of a third or half of its life cycle, the engine begins to “age”:

• Power decreases: “at nominal” it should be 90, but there will be 86-87 “power”;
• We can talk about a loss of “elasticity”: traction is lost “at the bottom”, but not in the area of ​​2000-2750 rpm;
• The maximum torque value does not depend on wear in any way.

Everything related to “new” diesel internal combustion engines (2015 and later)

The K9K858 diesel engine, which became the basis for the restyled Dusters, should wear out in the same way as the 884 series engines. Over time, the power will drop in any case. And also, the elasticity of the engine will gradually disappear. It, as stated here, is the main advantage of all Renault diesels. Just in case, here is a list of them:

• K9K796, K9K830 – 86 hp.
• K9K884, K9K892 – 90 hp.
• K9K896 (4x2 only) – 107 hp.
• K9K856 (4x2 only) – 109 hp.
• K9K858 (for 4x4) – 109 hp.
• K9K898 (for 4x4) – 110 hp.

The Renault catalog contains much more options- for example, K9K728 or 724, but they are not related to the Duster family. All best company Renault installs it in crossovers - believe me, in reality this is so.

The main character of the last chapter is the K9K858 motor

Test drive on video: a crossover with a 109 horsepower engine

1.5 dci is diesel four-cylinder engine with a turbocharger. The engine capacity is 1.5 liters, and power, depending on the modification, can vary from 64 to 110 horsepower. Engine index - K9K. It has been produced since 2001 and has undergone some changes during this time.

It is worth noting that this is one of the most popular turbodiesels created Renault-Nissan Alliance. This internal combustion engine is most popular in Europe, so secondary market We can often see used Renaults and Nissans with this engine. By the way, this unit is installed on several more Mercedes.

The obvious advantages of the engine are good low-end traction and relative fuel efficiency. The downside is poor sensitivity to the quality of diesel fuel, especially Russian, and maintenance requirements.

Indeed, in order for this internal combustion engine to serve for a long time and be properly maintained. And this is to change engine oil every 10,000 km or even earlier, while changing the timing belt - every 60,000 km and, of course, do not overheat.

The following problems can often be found in reviews:

1) Failure of the injection pump. Therefore, it is not recommended to purchase the version with fuel system dephi, which is very demanding on the quality of fuel, and if you fill it with poor quality, it will quickly die. It is recommended to take with siemens system(continental). Delphi come on versions with a small amount of horsepower. Please check this point before purchasing.

Models with a 6-speed also usually come with the Siemens system manual transmission transmission Engines with 5 speeds are usually Delphi.

2) turbine failure. This happens most often due to improper use. As we know, a turbodiesel cannot be turned off immediately after stopping, and you need to let it run for a while; for this there is a customized auto-start system in the alarms.

4) Rotate the connecting rod bearings. This happens if you do not change the oil on time and extend the change intervals. Change it every 10,000 km and this problem should not arise.

In conclusion, I will say that before buying a car with a 1.5 DCI engine, you should carefully check not only the body, suspension, legal purity, but also the engine itself, how it works, scan its errors, find out how often the oil was changed, whether there were any problems, and so on. Often there are 5-7 year old Megans with a mileage of 60-80 thousand, this, unfortunately, is not always true, the mileage could be changed. You can check it at the dealer, unless of course the mileage has been removed from the car's ECU.

When purchasing a car with DCI, you should regularly change the oil, filters, attachments- in general, everything you need, and choose a gas station that fills in really high-quality diesel fuel.

And it’s definitely not worth saying that this internal combustion engine is good or bad, since each copy has its own history and care, if we talk specifically about used options.

For reference: installed on Renault Megane, Clio, Scenic, Dasia, Duster, Nissan Qashqai, Tiida and other models.