Diesel engine K9K 1.5 DCI. Repair and maintenance of passenger cars. Problems and malfunctions of diesel engines Renault K9K

The location of a huge number of automotive amateurs has already won small turbodiesels. From them key advantages It is possible to highlight a high degree of efficiency, which can be placed in comparison with more volumetric fellow and optimal cost. Renault became one of the first automotive factoriesthat have begun to produce small diesel engines, the development of a fairly known 1.5 DCI has been completed together with Nissan. To date, a lot of cars are equipped with this engine.

The smallest line diesel engines is an force aggregatehaving the designation K9K, it appeared on the market in distant 2001. 4-Cylinder 8-Miklapan motor with fuel supply system " COMMON RAIL.»And the turbocharging was proposed in several variations, the capacity of which ranged from 64 to 110" horses ". The key differences between the models are in the equipment flywheel, turbocharger, nozzles, and so on. The advantages of the unit include a fairly high power degree and a small fuel consumption - approximately 6 liters per 100 kilometers.

Motor 1.5 DCI is often used in auto, Dacia and Renault. From 2003 to 2010 Small SUV Suzuki Jimny. The Turbodiesel was completed, and after Renault began working with Mercedes, new A-class models and Citan van were also equipped with this engine.

The list of problems that pursued 1.5 DCI is quite large. One of the most common and serious is the malfunction of the power system. As usual, this is associated with the use of low-quality fuel, which the French diesel is not able to undergo. In particular, it is related to the motors with Delphi nozzles that can withstand 10 thousand kilometers on a base diesel. One nozzle is approximately 8-12 thousand rubles. In models with "normal" nozzles and a simple system, you can save considerably by trying to restore their work. If the nozzles of piezoelectric - will help exclusively replacement.

At some part of copies, the turbocharger can cause unpleasant moments after the sixty-thousand mileage. Turbochargers were used by 2 species - with a variable and fixed geometry.

It often happens the path of pistons and turning into the inserts due to incorrectly functioning nozzles. In addition, it is possible to face typical malfunctions of the exhaust gas recycling valve for EGR. On versions that are somewhat more powerful, there are confusion with a 2-khmass flywheel. Another standard problem for diesel - dairy filterwhich may well require huge expenses. Regarding the price of a new better, it is better not to say, but praying, so that they have not disturbed the attitude towards him. Sometimes difficulties causes electronics of motor management: the valve position sensors and pressure pressure are very vulnerable.

As you can see from the review of possible problems with 1.5 DCI a lot. But, most of them are associated with incorrect use. To eradicate in the future of impressive and unnecessary expenses, owners diesel cars The shortcomings should be compensated for their own knowledge, which were due to exploitation of exclusively undead gasoline engines.

Many also consider 1.5 DCI risky enough. But it is necessary to recall that the preferential part of car owners with this turbodiesel is exclusively satisfied with their own acquisition, and wish to see the 1.5 DCI engine under the hood of its iron "horse" in the future.

Extremely popular, proven and sufficiently reliable diesel engine from Renault with the K9K factory index. It has many modifications with different power indicators.

Main differences different modifications (Each has its own three-digit digital code, for example, 732 corresponds to the power of 106 hp):

• Different turbines.
• Miscellaneous execution of the head of the cylinder block (GBC).
• Different engine management programs.

This engine was installed and installed on the following models:

Renault Megan 2, Renault Megan 3, Renault Scenic 2, Renault Scenic 3, Renault Grand Scenic 3, Renault Logan, Renault Duster (officially sold in Russia), Renault Kanga, Renault Kangu 2 (officially sold in Russia), Renault Clio 3, Renault Lagoon 3.

European Models of Nissan:

Nissan Juke, Nissan Mikra, Nissan Cascai, Nissan Nout, Nissan Tiida.

What to pay attention to operation (possible engine problems K9K 1.5 DCI):

Worn liners / damaged connecting rods

Turbine failure. The process can be gradual. The main signs - the engine begins "there" oil (oil accumulates in the intercooler radiator), drops or disappears (pickup) of the engine, extraneous metal sounds from the turbine, fresh oil leaks from the turbine. The guaranteed solution is the installation of a new, high-quality, non-original (German) turbine, the budget decision is to repair the turbine in a specialized service (not everyone is taken for these turbines) hours of work after repair - from 2 months to 2 years. When replacing the turbine, it is also necessary to change gaskets, seals, engine oil and air filter!

Brim belt break. As a rule, due to natural wear, if the timing belt did not change, or the falling out of the foreign object is usually a broken generator belt. The breakdown of the timing belt with a high probability leads to the valve clamp (all or several) and, as a result, enough expensive repair The engine (removal of the GBC, replacement and triggering of valves, adjusting the valves - it is necessary to pick up and order "cups").

The failure of the glow candles. The official regulations on the replacement of glow candles on this engine are not - they change in case of failure. Signs - the car is poorly started in cold weather, if all the candles came out of the order - it does not start at all.

List of mandatory regulatory (service) works:

• Replacement motor oil And the oil filter is 10,000 kilometers or a year, depending on which it comes before.
• Replacement air filter - every 10,000 km.
• Replacement belt and timing roller, replacement drive belt - Once at 60,000 km or every 4 years.

Engine characteristics:

• Working volume - 1461 cc (or in a spacious 1.5 liter).
• Type - 8 valves, 4 cylinders in a row, one top camshaft.
• Injection is the immediate with the general RamMoy "Common Rail".
• Power: 68 - 110 hp
• Torque: 240 (by 2,000 rpm)
• Compression ratio - 18.25: 1.
• GRM drive - timing belt with one roller. (Replacing 60,000 km or every 4 years, regulations for the Russian Federation).
• The order of ignition in cylinders 1-3-4-2 (cylinder №1 by flywheel)
• Water pump and TNVD are given from toothed belt Timing.

Service and repair technical data for engine Renault K9K.

Compression (engine is heated to 80 degrees):

• Minimum pressure - 20 bar
• The permissible difference between the cylinders is 4 bar.

* Measurement is carried out by a special diesel compressometer.

Pressure in the lubricant system (engine is heated up to 80 degrees):

• On the idling - 1.2 bar (minimum).
• 3000 rpm - 3.5 bar (minimum).

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Engine Overview K9K Renault Duster

On many cars Renault Duster, Renault Megan 2 is installed a diesel engine K9K 1.5 DCI volume of 1.5 liters, with a capacity of 86l.s. K9K turbo-with superior, in-line, liquid cooling, with four cylinders, with an ONS gas distribution mechanism, located in motor compartment transversely.

The head of the diesel engine cylinders is made of aluminum alloy. Laying the head of the cylinder block is made of metal, making it more resistant to high temperatures and pressure.

Motor cylinder block K9K Renault Duster car, Renault Megan 2 Molds from gray cast iron with already formed cylinder sleeves. At the bearings crankshaft Cast-iron covers included in the block, including bolts.

In both parts of the bearings invested invested. Inserts have boring locks and lubricating grooves along the central circle. The engine camshaft is installed in the bed of bearings, made in the body of the head, and fixed from the axial movement by the stubborn flanges.

The crankshaft of the engine K9K 1.5 DCI rotates in the indigenous bearings having thin-walled steel liners with an antifriction layer. The axial movement of the crankshaft is limited to two semicircles installed in the ducts bed of the middle indigenous bearing.

Oil canals to bearings were transversely (diagonally). The flywheel, cast from the cast iron, is set at the rear end of the crankshaft and is fixed with six bolts. On the flywheel pressed the gear rim for starting the engine starter.

Pistons of diesel engine K9K car Renault Duster, Renault Megan 2 are made of aluminum castings. In the bottom of the piston from the side of the combustion chamber, a recess with the guide edge was made, which ensures the vortex movement of the absorbable air and as a result of this very good mixture formation.

Special cooling scheme ensures the cooling of the piston during the release tact. Friction B. piston group Reduced at the expense of graphite coverage of the piston skirt.

Fig. one. Oil filter and oil exchanger engine K9K car Renault Duster

1 - bolt fastening of the oil filter bracket; 2, 10, 11 - sealing rings; 3 - Oil filter engine Renault Megane 2; 4 - heat exchanger sealing ring; 5 - heat exchanger attachment bolt; 6 - heat exchanger; 7, 8 - oil pipelines; 9 - Oil Filter Bracket

Piston fingers of the diesel engine Renault Duster installed in the pistons of the pistons with the gap and pressed with the tension in the top heads of the connecting rods, which are connected by its lower heads with connecting rod crankshafts through thin-walled liners, in designs similar
Native.

Because of the high maximum cycle pressure, the piston finger diameter is increased. Steel rods, forged, with a core of a foreign cross section. The connecting rod and its cover are made from a single workpiece and processed in one piece, after which the cover is swallowed from the connecting rod by special technology.

The result is the most accurate fit of the covers to its connecting rod. At the same time, the installation of the cover to another connecting rod is unacceptable. Renault Duster Combined Engine Lubrication System.

Oil crankcase oil is absorbed by the oil pump, passes through the oil filter and is fed under pressure to the engine. The oil pump with an overpressure valve is driven by a roller chain from a crankshaft sprocket.

Under the engine crankshaft K9K 1.5 DCI car Renault Duster is an oil reflective shield that prevents rapid overflow of oil. The engine of the aluminum alloy engine is combined with the front and back covers and are attached to the engine cylinder block.

Oil heat exchanger 6 and oil filter 3 are also embedded in the lubrication system (Fig. 1). An overpressure valve is also enshrined in the oil filter housing, providing the ability to reverse bypass oil. Oil filter is equipped with a replaceable paper filtering element.

Renault Duster Hermetic Engine Cooling System, with expansion BachkomConsists of a cooling shirt made in casting and surrounding cylinders in the block, combustion chambers and gas channels in the cylinder head.

Forced circulation Cooling fluid provides a centrifugal water pump with a crankshaft drive with a drive belt auxiliary aggregates.

To maintain the normal working temperature of the coolant in the cooling system of the diesel engine K9K RENAULT MEGANE 2, the thermostat is set to overlap big circle Systems with an immentable engine and low cooling fluid temperature.

Turbocharging system and recycling of exhaust gases. The outlet collector is attached to the flange of turbocharger nuts. The turbocharger serves to increase air pressure using a turbine, which is driven by the exhaust gases.

Turbine bearings lubrication included in general System Engine lubricants K9K Renault Duster cars. The turbocharging system is supplemented by the recycling system of exhaust gases.

The amount of exhaust gas supplied to the system is regulated by an electromagnetic valve of the recycling of exhaust gases, the cone-shaped pusher changes the cross section of the bypass with different valve position.

Supply system. In the cylinders of the diesel engine Renault Duster when the piston moves, clean air is absorbed. During the compression stroke, the pressure in the cylinder increases sharply, while the temperature in it becomes higher than the temperature of the ignition of diesel fuel.

If the piston is located in front of the ITT, then the cylinder heated to the temperature + 700-900 ° C is injected with diesel fuel, which is self-propagated, so the ignition candles are not required.

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

For this occasion in the combustion chamber installed candles of incandescentwhich are located so that the jet of fuel from the nozzle sprayer falls on the hot tip of the candle and flammified.

Incandescent candles are automatically turned on at the time directly preceding the inclusion of the starter. At the same time, the adjustment device is turned on in the instrument combinations, and the incandescent candles begin to heat up to a high temperature.

The main goal of the heating of candles is confident ignition of fuel injected into the cylinder. After heating the candle to the required temperature (it usually takes a few seconds) the signaling device goes out, and the engine K9k car Renault Duster can be allowed.

Typically, the signaling device goes out the faster, the higher the temperature of the engine. Immediately before starting the engine (or most often soon after it), incandescent candles are disconnected.

In most modern engines they can continue to work up to several minutes after starting to reduce the level harmful emissions In the atmosphere when working with a cold engine, as well as to stabilize the combustion process in an even incompletely heated engine.

Then the flow of current on the candle stops. Thus, from the proper operation of the incandescent candles, the launch of a diesel engine and its further work will be directly dependent.

The fuel is supplied with a high-pressure fuel pump (TNVD) engine K9K 1.5 DCI car Renault Duster directly from the fuel tank.

In the TNAD, the fuel is compressed before injection, then fed to the engine cylinders in order of their work. At the same time, the fuel pump regulator measles the fuel depending on the position of the gas pedal.

Through the nozzles, diesel fuel at a certain point is injected into the forcamer of the corresponding cylinder. Due to the form of the forkamera (vortex chamber), the incoming air receives a certain twist when compressed, as a result of which the fuel is optimally mixed with air.

Before fuel goes into the Renault Duster car RenVD, it passes through fuel filterin which the pollution and water is cleaned. That is why it is important in a timely manner, according to the regulations, replace the filter.

TNVD does not require care. All moving parts of the pump are lubricated with diesel fuel. The pump is activated from the crankshaft pulley with a toothed belt.

Because in the diesel engine K9K 1.5 DCI RENAULT MEGANE 2, a fooling of a combustible mixture occurs, the ignition system is not required, and an electromagnetic valve is installed in the TNLD.

To stop the diesel engine, the voltage supply to the electromagnetic valve is interrupted and the valve overlaps the fuel channel, due to which the fuel supply stops and the engine stops. When turning on the starter to electromagnetic valve The voltage is served and it opens the fuel channel.

Replacing belt timber engine K9K car Renault Duster

With each engine maintenance K9K car Renault Duster Check the timing belt tension.

With a weakened belt quickly wear his teeth and besides this, it is possible to jump the timing belt K9K Renault Duster on gear pulleys. The crankshaft and distributional shafts, which will lead to a violation of the installation of the phases of gas distribution and reduce the power of the engine, and with a significant leakage - and to its emergency damage.

Plant The manufacturer recommends checking the belt tension and control it with a special strain gauge tester. In this regard, the data on effort in the deflection of the belt branch for a certain amount in the technical documentation is absent.

In practice, it is possible to approximately assess the correctness of the tension of the timing belt K9K Renault Duster according to the "Rules of thumb": adjust to the branch of the belt with a thumb and determine the deflection using the ruler.

According to this universal rule, if the distance between the centers of the pulleys is from 180 to 280 mm, the deflection must be about 6 mm. There is another way to pre-check the tension of the timing belt Renault Megane 2 - by twisting its leading branch along the axis.

If the hands are able to twist the branch more than 90 °, the belt stretches weakly. These methods can be distributed only to excessive belt weakening, so for accurate check And tension adjustments refer to the service.

On the car installed roller tension of the timing belt of the Renault Duster with automatic adjustment.

Motor motor drive belt K9K 1.5 DCI Renault Duster shall be replaced if you find it: you will find:

- traces of oil on any belt surface;

- traces of wear of the toothed surface, cracks, cutting, folds and detachment of tissue from rubber;

- cracks, folds, recesses or bulges on the outer surface of the belt;

- Splitting or bundle on the end surfaces of the belt.

Timing belt Renault Duster with traces of engine oil on any of its surfaces necessarily replace, as the oil quickly destroys the rubber. The cause of the oil on the belt (usually it is a disruption of the tightness of the seals of the crankshaft or distribution shafts) eliminate immediately.

Work on replacing the timing belt, spend on the observation ditch, the overpass or if possible on the lift.

Operations for replacing the timing belt engine K9K Renault Duster:

Remove the right support engine suspension K9K Renault Duster.

Install the piston of the cylinder to the NMT position of the compression tact.

Remove the bolt mounting the pulley of the auxiliary aggregates and remove the pulley.

Removing the locks, remove the bottom lid of the Renault Duster drive drive belt.

Holding the hexagon key, loosen the tightening nut nut tensioner roller And remove the timing belt.

Install the Renault Duster timing belt in order reverse removal.

When installing the label on the camshaft pulley and the label on the high-pressure fuel pump pulley must match the tags on the belt.

The label on the pulley of the high-pressure fuel pump should coincide with the label on the cylinder block.

Slide the moving tap of the tensioner clockwise by 7-8 mm on the fixed label.

Install the pulley of the drive of the auxiliary units in the reverse order.

Remove Shkiva Locks distribution Vala. and nmt.

Tighten the Renault Duster's crankshaft per bolt pulley drive auxiliary units for six revolutions.

Loosen the tightening roller nut no more than one revolution, holding the roller with a hexagon key.

Align the movable tension roller label with fixed and tighten the roller nut with a torque of 27 nm.

To control the correctness of the installation of the Thame distribution phases, install the piston of the 1st cylinder to the NMT position of the compression tact.

Check out the matching of labels on the camshaft pulleys and high-pressure fuel pump with tanks on the belt, as well as the tagging of the high-pressure fuel pump pulley tagging on the cylinder block. If the labels do not coincide, repeat the setting of the timing belt Renault Duster.

Set all the details in order to remove them.

Installing the piston of the first cylinder of the engine K9K 1.5 DCI RENAULT MEGANE 2 in the NMT position of the compression tact:

Remove the right front wheel.

Remove the liner of the right front wheel.

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

Remove the drive belt auxiliary units.

Remove the right support engine suspension Renault Duster.

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

Rotating the crankshaft clockwise per bolt for fastening the drive pulley auxiliary units, align a hole in the cylinder block with a hole on the camshaft pulley.

Remove the hole plug to install the NMT position clock. The cork is located on the left of the flywheel Renault Duster in the cylinder block at the level of the 1st cylinder.

To fix the camshaft, insert the retainer into the holes for the camshaft pulley and the cylinder block.

Motor K9K - representative of the series of power units Renault. This is a diesel engine that saw the world in 2001. Eight-flaped, economical and cheap power unit with a 1.5 liter volume and DCI injection system.

Specifications and description

The main motor has low characteristics. On the volume of 1.5 liters of only 65 horse power. There are no components such as a turbocharger and two-stage flywheel on this motor. There is also a Delphi injection system that operates under low pressure.

Engine K9K.

The most popular version is 82-strong. A turbocharger with an intercooler is already installed on this motor, and fuel is supplied under higher pressure 1.0-1.2 bar. Also, new generation nozzles are installed.

In a 100-strong variation there is already a two-mask flywheel and a turbine with a variable geometry. The injection pressure is increased here from 1400 to 1600 bar, and the pressure pressure reaches 1.25 bar. Also changed the design of the crankshaft and the head of the cylinder block.

Consider the main specifications Power units:

Service

As you know, diesel power units require more frequent maintenance. The intersavice interval for Motor K9K is 7500-8000 km. Often the owners complain that this is too short time, but at the same time 1.5 The engine consumes only 5.5 liters per 100 km run.

Engine cylinder block K9K

also in maintenance Includes checking all systems, no heights of oil and malfunction. Every 30,000 km it is necessary to carry out complete diagnostics of the ECU, and a air filtering element is being replaced every 20,000 km. According to the manufacturer's manufacturer's recommendation, each 2 is worth cleaning the nozzles.

Output

The K9K engine is a reliable and strong power unit that has several modifications. The weakest engine has only 65 horsepower. The strongest is a 100-strong motor with increased power characteristics.