Repair and maintenance of passenger cars. Weak Places and Disadvantages of Engine K9K Renault Motor Marking 1.5 Diesel

Extremely popular, proven and quite reliable diesel engine from renault. with the factory index k9k. 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 problems Engine 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. Guaranteed solution - installation of a new, high-quality, non-original (German) turbine, budget decision - turbine repair in 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 oil filter - Once every 10,000 kilometers or once 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 the timing belt timber.

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).

After in 1999, it was created and launched into a series of flagship line gasoline engines Renault-Nissan - K4M engine, in front of the French-Japanese designer tandem, the task of updating the diesel power units. According to the results of such cooperation, since 2001, the production of 1,5-liter diesel engine of the K9K series is launched on Renault-Nissan conveyors. Over the past 15 years, this motor was installed (and continues to be installed) passenger cars Renault (Duster, Fluence, Twingo, Clio, Scenic, Kangoo, Megane), Nissan (Note, Almera, Juke, Quashkai), Dacia (Logan, Sandero, Dokker), Suziki (Jimny), Mercedes (in A and B class) . The K9K engine is the most massive diesel engine Renault Nissan in the 2000s.

Structurally, the K9K engine is a four-cylinder row power unit equipped with a high-pressure fuel injection system (Common Rail), with a turbocharger and a common fuel frame. Any special design "delights" the creators of this motor did not use, making a classical layout at a time-tested time. As a result, the automaker received a "basic" engine, easily adaptable to a specific model or layout of the car by using different hinged equipment and electronic system Control. There are several dozen K9K engine modifications for Renault cars, Nissan, Mercedes, Dakia and Suzuki. To determine for which machine it was created by one or another power unit, which is its power characteristics and features of the attached equipment used, in three numbers that follows the engine marking. For example, in our online store you can buy a Renault engine K9KJ836. This power unit is removed from the car Renault Megane 3 with 6-step mechanics and has a power of 110 hp Similarly, other Renault motors are identified.

Major malfunctions and engine resource K9K 1.5 DCI

The accumulated 15-year experience of operating the K9k engines allows to accurately determine the resource and the margin of the strength of this power unit. Subject to regulations maintenance (by the factory) these motors work without overhaul About 300 thousand kilometers, and the first 150 thousand do not deliver serious trouble with their owners. But in practice, this figure can be very different both in the greater and in a smaller side. The fact is that K9K engines are very sensitive to the quality of the oil used. Therefore, if you use oil, differing in its characteristics from the factory recommendations, or change it less often than 1 time per 10,000 km of run (according to the recommendations of the plant 15 and even 20 thousand km), thereby cut the life expectancy of your motor. The problems with the lubricant system usually lead on K9K engines to turning connecting rod insertsSo, - to guaranteed overhaul.

Another big problem with the owners of cars equipped with K9K engines is the lack of experienced specialists in the Common Rail fuel system. That is, there are such specialists, but only in large cities and, as a rule, they work by appointment. In other words, if you have started problems with the fuel system (and considering the quality russian fuelSuch problems may occur at any time), then you will have to either wait for your turn to repair, or contact the service without warranty on the quality of work performed. Design features fuel system The K9K engine is such that breakdown or incorrect operation of one of the elements of the system, in most cases, lead to failure and other vital elements for the operation. For example, incorrectly operating engine nozzles K9K, can "bring" your motor even before burning the pistons. So, if you have on dashboard There are messages about malfunctions with the engine, it is not necessary to regularly erase the error from the computer's memory, it is much wiser to immediately contact a qualified service for detailed diagnostics and troubleshooting.

Well, of course, it is very important to follow the condition of the engine turbine K9K Renault. With incorrect circulation, the turbine may require attention after 60,000 km of run. And the cost of this part is very high and on average is 20-25 thousand rubles for used parts and 45-70 thousand rubles for the new original. By the way, the cost of all components of the K9k fuel system is high enough. So, used the nozzles in our online store there are 10 thousand rubles per piece, the TNVD K9K - 16 thousand rubles, the USR valve - 6 thousand rubles and so on. The cost of new original detailsNaturally, several times above.

The owners of a car equipped with this power unit can be recommended as follows:

• carefully choose and change the engine oil in a timely manner (it is better not less than 1 time by 10 thousand km of run);
• refuel only with high-quality fuel, in no case fill in the "left" tank diesel fuelor fuel at refueling of dubious brands;
• regularly (preferably with each oil change) change fuel filter - For you, this is the most important element of savings on the future repair. Some car owners even change the Filter Filter Filter with more thin cleaning;
• change the air filter every 30,000 run;
• if you appear on the dashboard messages about the problems with the engine immediately refer to the diagnosis.
• do not save and do not tighten the repair. Turbine incorrectly works, and you do not rush to replace it? - Then expect high costs as well, on the nozzles and fill.

Despite the apparent abundance of serious Renault K9K engine problems, it should be noted that the absolute majority typical breakdowns It is primarily due to the incorrect operation of this power unit. The motor itself has a sufficient stock turn, but is designed for regular and attentive maintenance, visiting a qualified specialist and accurate diagnostics.

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Engine K9K Turbo - with a superior, inline, liquid cooling, with four cylinders, with an ONS gas distribution mechanism.

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.

The engine cylinder block mold from gray cast iron with already formed cylinder sleeves. In the bearing 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 rotates in the native 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 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. The friction in the piston group is reduced due to graphite coverage of the piston skirt.

The piston fingers are installed in the pistons of the pistons with the gap and pressed with the tension in the top heads of the connectors, which are connected by their lower heads with rod crankshaft cranks through thin-walled liners, according to the design similar to the root. Due to the high maximum cycle pressure, the diameter of the piston finger 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.

Combined lubrication system. Oil flow. Oil from oil Carter It 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 crankshaft The engine 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. 5). 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.

Motor cooling system sealed, 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 cooling fluid circulation provides a centrifugal water pump with a crankshaft drive with a drive belt auxiliary aggregates. To maintain normal operating temperature The cooling fluid in the cooling system is set to the thermostat, overlapping a large circle of system 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.

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 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 spark plugs are not required.

However, when the engine is started after a long downtime (cold), especially if the air temperature is low, simple compression is often not enough to ignite the combustible mixture. For this occasion, the combustion candles are installed in the combustion chamber, which are located so that the jet of fuel from the sprayer of the nozzle falls into 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 instrument combinations include the alarm 9 (see Fig. 7), and the incandescent candles begin to heat up to high temperatures. 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 (usually takes a few seconds) the signaling device goes out, and the engine 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, not completely warm 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 1,5-liter DCI turbodiesel from Renault (K9K designation) appeared in 2000 and has been produced more than 10 years since then. Of course, for all this time, the motor has repeatedly modernized. This power unit survived the change of fuel systems from three manufacturers. Initially, Motor K9k was equipped with cOMMON. Rail from Delphi, then appeared versions with the fuel system from Siemens and in the most recent generations - with injection from Continental (essentially it is the same Siemens, but with the Continental logo, which has acquired the VDO Automotive division from Siemens).

The 1.5 DCI engine has a series of typical "sores", but the presence of some of them depends on the manufacturer of the fuel system. So, in about September 2004, the K9K engine was equipped with an exclusively fuel system Delphi. Such motors in their designation have an index to 728 inclusive, as well as 830 and 834, and their power does not exceed 105 hp. The DELRHI fuel system is more demanding on the quality of the fuel, but in repair all its components are cheaper. This fuel system needs good care is needed, only the original fuel filter should be installed for its trouble-free operation. But the most important thing is to feed it only with high-quality diesel fuel. Due to poor-quality or "dry" diesel fuel (and all the rubber components are lubricated by the fuel) and even more so because of the water content in fuel or short-term trusting of the fuel system Delphi may begin to "drive a chips" due to, which subsequently applies to The entire fuel system. The chips are formed in a pair "Rotor TNVD - Shaft Rollers". As a result, nozzles and pump itself can be released. In addition to the formation of chips, literally poisoning the entire fuel system, the performance of the TNVD falls: it ceases to supply fuel under the starting pressure. Also a weak injection site from DEKPHI are the check valves of the nozzles, which are excessively poured fuel to the return fuel line. Because of this, problems can occur with the start of the engine.

The advantage of the DELRHI fuel system, in addition to maintainability and relatively low repair cost, is the use of accelerometer, thanks to which the injection is adapted to the natural wear of the nozzles. This feature allows you to change and put nozzles without registration, pull and change the valve. By the way, the new Delphi nozzle for 1.5 DCI K9K motor will cost 500 rubles.

By 2005, the 1.5 DCI K9K motor was upgraded. He has changed the head of the cylinder block, crankshaft and piston, and the power rose - in the most powerful version Righting the motor reaches from 106 to 110 hp. For fuel injection into the cylinders of such motors, the CommonRail system from Siemens is responsible. Modernized engines Received indexes 732, 764, 780, 804, 832, 836. Powerful 1.5-liter DCI diesel engines with fuel Siemens can be identified by the presence of a 6-speed MCP, while all the variants of this engine with fuel from Delphi worked as a pair with 5- Step MCP. And if you look into the pumproom space and consider feedback channels of the fuel, then Delphi can be recognized by top-containers, and Siemens - on the emerging side.

Siemens fuel system is definitely more reliable and characteristic weaknesses has no. If problems with it happen, then only because of a significant run. The most common problem with the Siemens fuel system is associated with the malfunction of the pumping pump built directly in the TNVD. Low productivity "swap" causes its excessive wear. As a result, the TNLD does not receive a sufficient amount of fuel and works with deviations from the norm, which immediately responds to the engine performance.

Siemens fuel system (or later Continental) uses exclusively piezoelectric nozzles. They are unpretentious and easily serve 200,000 km and even more. However, they cannot be repaired: it is implied only full replacement. You can put both new (about 400-700 rubles per piece) nozzles and "b / ear" (200-400 rubles).

In rare cases of fuel system malfunctions can lead to 1.5 DCI K9K motor death. Because of the "pillings", nozzles can ruin pistons. However, the most common cause of the total drill of the K9K motor is the bulk of connecting rod liners. The fact is that connecting rod liners here are short-lived and experience heavy loads. As natural wear, the gap is increased between the neck of the shaft and the liner, through which the oil, without meeting sufficient resistance, is simply merged into the pallet, without lubricating loading parts. As a result, the wear of the liners accelerates, which will soon lead to them. The engine caught due to the grinding is often changed to the contract - it is cheaper and faster. average cost Contract motor 1.5 DCI varies from 1000 to 2000 rubles.

To avoid a flap of liners, their preventive replacement is recommended every 60,000 km. A motor oil for a 1.5 DCI K9K motor oil should use only the appropriate tolerances of the manufacturer. It is important to know that the car needs to immediately change not only all consumables, but also connecting rods from Europe. In Europe, the interservice interval of this motor reaches 30,000 km, which is not at all for the benefit of the inserts. By the way, when replacing oil on this engine It is recommended to fill new filter Freshly oil: it will exclude short-term oil starvation of rubbing parts of the engine.

Cut the service life of 1.5 DCI K9K can also be faulty oil filter valves: due to them, with a non-working motor, the oil is not retained in rubbing parts and merges into the pallet. Consequently, when starting the engine, a few seconds literally works "on dry". Also low oil pressure in this force aggregate may be associated with a weakened spring reduction valve Oil pump. Create an approximate view about the state of oil pressure in the engine 1.5 DCI K9K can be on the light bulb on the dashboard: if after at least half an hour of downtime goes out instantly after the engine is started, then the oil pressure is most likely in order. However, in any case, prophylactic work on the replacement of connecting rod liners should not be postponed.

In general, due to these most liners, the entire engine suffers. After all, in friction, the chips is formed, which oil spreads over the entire motor. So, in particular, only because of this chips "dies" by the turbocharger of the 1,5 DCI K9K motor. The Turbines of the company KKK, which now belongs to an even larger BorgWarner corporation. Motor turbine 1.5 DCI K9K has several executions, but they are all reliable and do not have constructive flaws. However, such turbines break. The reason, as a rule, is one: the fine chips fall into the oil film on the bearing sleeves of the rotor. Here, with huge speeds of rotation of the rotor, the metal on its surface is flared, the smallest imbalance is formed, which after a while breaks the turbine seals. Also, the engine turbines of 1.5 DCI k9k fails due to the use of irregular engine oil (inappropriate tolerances or viscosity) or due to an increase in the intervals of its replacement.

Powerful modifications of 1.5 DCI K9K engine are equipped with a two-stage flywheel and summer filter (FAP) that may require replacement - they are simply not refundable.

For your car you can choose on our site

Renault K9K engine (Renault K9K) is used for installation on Renault Duster cars ( Renault Duster.), Renault Megan (Renault Megan), Nisan Cascai ( Nissan Qashqai.), Nisan Juk ( Nissan Juke) etc. A family of diesel turbocharged engines K9K is a product of the joint development of the Renault-Nissan alliance.
Features. Engines are produced in different versions other than their technical characteristics. Each configuration corresponds to the three-digit code (three digits) following the K9K series, for example: K9K 884 (90 hp Renault Duster), K9K 796 (86 hp Renault Logan, Sandero), K9K 636, K9K 837, K9K 846 , K9K 836 (110 hp Renault Megan).
The engine was designed in 2001, its design is reliable and checked for years. Malfunctions most often happen when running more than 150 thousand km. One serious possible breakdowns Renault 1.5 DCI engine is a bulk inserts. The reason is most often unreasonable replacement Motor oil.

Engine Characteristics Renault K9K 1.5 DCI Duster, Logan, Megan

Design

Four-stroke four-cylinder diesel engine with fuel injection system under high pressure, with general fuel distribution ramp, with turbocharging, with a row position of cylinders and pistons rotating one common crankshaft, with the upper arrangement of one distribution Vala.. Engine has liquid system Cooling a closed type with forced circulation. Combined lubrication system: under pressure and splashing.

Cylinder block

The K9K 1.5 DCI cylinder block is cast from a special high-strength cast iron with cylinders, boring directly in the body body.

Inlet and exhaust valves

The diameter of the inlet valve plate is 33.5 mm, graduation - 29 mm. The diameter of the inlet valve rod is 5.977 ± 0.008 mm, the exhaust - 5,963 ± 0.008 mm. Inlet valve length -100.95 mm, graduation - 100.75 mm. The intake and exhaust valves are equipped with one spring fixed through a plate with two breadcrumbs.

Crankshaft

Shatun.

K9K steel rods forged.

Piston

Piston Renault K9K 1.5 DCI cast aluminum alloy.

Piston fingers steel. The outer diameter of the piston finger is 24.8-25.2 mm, the inner diameter is 13.55 - 13.95 mm, the length of the piston finger is 59.7-60.3 mm.

Service

Oil in Renault K9K 1.5 DCI (Duster, Logan, Sandero, Megan, Klio, etc.) It is necessary to pour the recommended Reno RN0720 (ELF Solaris DPF 5W-30, Motul Specific 0720 5W-30). If the antique filter is installed, it is recommended to fill the oil 5W30 if not - 5W40.
Motor oil replacement for the engine oil engine without an anticoise filter, with maintenance RENAULT every 20,000 km of run or 1 year of operation and or every 300,000 km of run or 2 years of operation. For the K9K engine without an anticoise filter with maintenance Renault every 30000 km of run or every year of operation. The required oil volume in the engine Renault K9K 1.5 DCI (Duster, Logan, Sandero, Megan, Klio, etc.) when replaced - 4.0-4.3 l (without replacing the oil filter) and 4.4-4.5 l (with the oil filter replacement).
Timing strap replacement period Recommended by the manufacturer during operation in the Russian Federation every 60,000 km.
Replace the air filter It is recommended to carry out once every 30,000 km. When operating B. heavy conditions (dust roads, country roads) replacement explicit signs Pollution.