6616 19.09.2018

The large concern Renault produces engines for all regions in which its cars are presented. If European models have long switched to turbo engines and even electric traction, then budget cars of the Renault brand, such as Logan, Sandero, Duster and Kaptur, are content with "time-tested" atmospheric engines.

In this article, we will talk about the Renault 1.6-liter engine, which bears the designation K4M. You can buy a Renault 1.6 (K4M) contract engine from.

The Renault 1.6 (K4M) engine has been tested by time since 1999. In general, this engine replaced the K7M unit, which has the same displacement. Both engines for many years became the only driving force behind the budget Renault Logan of the Moscow and then Togliatti assembly.

The K4M power unit with a working volume of 1.6 liters is found on a variety of European-assembled Renault models. You can find a list of these models below.

Compared to the 8-valve K7M predecessor, the K4M engine features a 16-valve aluminum alloy die-cast cylinder head. There are two camshafts in the cylinder head. There are hydraulic compensators in the valve drive, eliminating the need to adjust thermal gaps. All Renault engines of the "K" family have a cast-iron block and this engine is no exception. A toothed belt is responsible for the synchronous rotation of the camshafts and crankshaft, which, together with the rollers, must be changed every 60,000 km. When the timing belt breaks, the pistons hit the valves.

Among the modifications of the Renault 1.6 K4M engine, there are versions with a phase shifter. It is installed on the intake camshaft, controlled by a separate valve, the place of which was found directly in the cylinder head.

Versions of the Renault 1.6 K4M power unit with a phase regulator
Motor index	Power	What models did you install it on?
K4M 800, 801, 804, 862	88, 109, 112, 128 HP	Renault Clio 3, Fluence
		Renault Twingo 2 / Wind
		Renault Fluence
		Renault Scenic 2
K4M 761, 766, 782, 812		Renault Scenic 2 / Grand Scenic
		Renault Laguna 2
		Renault Laguna 3
K4M 760, 761, 812, 813		Renault Megan 2
		Renault Megan 3 / Scenic 3

Reliability, problems and engine life Renault 1.6 (K4M)

The Renault 1.6 (K4M) engine usually does not cause problems. This engine is really reliable and unpretentious. The main thing is not to lower the bar in the level of service and the quality of the consumables used. Elementary savings on service can lead to engine failure.

Perhaps the greatest danger to the health of the Renault 1.6 (K4M) engine is a timing belt break, after which the pistons bend the valves.

If you do not save on the maintenance of this engine, it will easily pass both 400,000 and 800,000 km. Operating experience even on dubious fuel and in difficult conditions of the CIS countries shows that a 1.6-liter Renault engine can easily withstand a very serious mileage. However, small troubles still happen with the K4M motor. Now let's talk about them.

Phase shifter

The phase regulator of the K4M motor does not have an enviable service life and requires replacement every 100,000 km. It just crashes. You can find out about its breakdown by a suspicious chirring sound coming from under the hood when the engine is running. In addition, when the phase shifter fails, fuel consumption increases, and engine power decreases. An engine with a faulty phase shifter may operate in emergency mode, or it may stall immediately after starting.

Minor malfunctions

With a sufficiently tenacious cylinder-piston group, the Renault 1.6 (K4M) engine is capable of causing trouble in terms of electrics, oil leaks and other annoying things.

Ignition coils fail, spark plugs also do not last long. Fuel injectors are durable, but can become clogged, which is eliminated by ultrasonic cleaning.

Oil leaks from the crankshaft oil seal, from under the valve cover or from its mounting bolts are quite common. Also, the K4M engine pump may leak.

The culprit of the unstable operation of the engine, in addition to candles or coils, may be air leakage through cracks in the intake manifold or through its seals.

The throttle valve of the Renault K4M engine also needs to be cleaned periodically.

Today we’ll talk about the Renault Logan 2 engine, discuss the pros, cons and features of ICE repair. So, in the new Logan 2, Renault offers three engines for installation:

• 8-valve engine with a volume of 1.6 liters. and power 82 HP- model K7M
• 16 valve engine with a volume of 1.6 liters. and power 102 HP- model K4M
• new 16 valve engine with a volume of 1.6 liters. and power 113 HP — H4M

Consider the pros, cons and maintainability of these engines in more detail.

• Engine Model - K7M
• Working volume - 1598 cm3
• Number of cylinders - 4
• Number of valves - 16
• Cylinder diameter - 79.5 mm
• Piston stroke - 80.5 mm
• HP power – 82 at 5000 rpm
• Power kW - 60.5 at 5000 rpm
• Torque - 134 Nm at 2800 rpm
• Compression ratio - 9.5
• Timing drive - belt
• Fuel consumption in the city - 9.8 liters
• Combined fuel consumption - 7.2 liters

Advantages of the K7M engine

• and reliability of engine design;
• reliability: proven motor resource is more than 400 thousand km;
• universal and maintainable;
• easy to maintain;
• have high torque
• good “elasticity” of engines equal to 1.83 is provided.

Cons of the K7M engine

• relatively high fuel consumption;
• there is an instability of revolutions when idling;
• there are no hydraulic compensators in the design, so it is necessary to constantly adjust the valves (after 20-30 thousand km);
• there is a possibility of bending the valves in the event of a sudden break in the timing belt;
• crankshaft oil seals often leak;
• low reliability;
• very noisy and prone to vibrations.

K7M Engine Repair

The video below shows how a typical K7M engine repair is carried out on Logan.

K4M - Renault Logan 1.6 liter engine. 16-valve 102 hp

• Engine Model - K4M
• Working volume - 1598 cm3
• Number of cylinders - 4
• Number of valves - 16
• Cylinder diameter - 79.5 mm
• Piston stroke - 80.5 mm
• HP power – 102 at 5750 rpm
• Power kW - 75 at 5750 rpm
• Torque - 145 Nm at 3750 rpm
• Engine power system - distributed injection with electronic control
• Compression ratio - 9.8
• Timing drive - belt
• Maximum speed - 180 kilometers per hour
• Acceleration to the first hundred - 10.5 seconds
• Fuel consumption in the city - 9.4 liters
• Combined fuel consumption - 7.1 liters
• Fuel consumption on the highway - 5.8 liters

Advantages of the K4M engine

• reliability, practical resource exceeds;
• compliance with Euro-4 environmental standards;
• increased power (102 hp);
• low noise and vibration resistance;
• more modern and reliable cooling system.

Compared to 8-valve engines, the K4M 16V is much quieter, not subject to vibrations and has the same resource, but much more power and torque.

Cons of the K4M engine

• expensive spare parts;
• "Bending" of the valves when the belt breaks;
• weak "elasticity" of the engine, equal to 1.53, as a result - problems with car acceleration when overtaking.

K4M Engine Repair

The video below shows how a typical K4M engine repair is carried out on Logan.

H4MK - Renault Logan 1.6 liter engine. 8-valve 113 hp

In 2104, Renault Logan 2 of the Togliatti assembly began to install a new 16-valve 1.6-liter engine. Atmospheric H4M engine(or HR16 according to the Nissan classification) has a power of 113 hp. and is also installed on Renault Duster, Captur, Lada X-Ray, Nissan Sentra and Nissan Zhuk.

It differs from the engine of the previous generation K 4M (volume 1.6 liters, power 102 hp) with increased torque (152 versus 145 Nm), but the maximum torque is reached at 4000 rpm instead of 3750 rpm. Built into the new Renault Logan 2 engine variable valve timing system, and instead of a timing belt, a timing chain finally appeared. In addition, the final drive ratio has been reduced: from 4.07: 1 for Logan and Sandero.

• Engine Model - H4M
• Working volume - 1598 cm3
• Number of cylinders - 4
• Number of valves - 16
• Cylinder diameter - 78 mm
• Stroke - 83.6 mm
• HP power - 114 at 6000 rpm
• Power kW - 83.8 at 6000 rpm
• Torque - 142 Nm at 4000 rpm
• Engine power system - distributed injection with electronic control
• Compression ratio - 10.7
• Timing Drive - Chain
• Maximum speed - 172 kilometers per hour
• Acceleration to the first hundred - 11.9 seconds
• Fuel consumption in the city - 8.9 liters
• Combined fuel consumption - 6.4 liters
• Fuel consumption on the highway - 5.5 liters

Advantages of the H4M motor

The main advantage of the new motor was improved elasticity and increased traction at low revs. But there is no increase in driving dynamics at all. Top speed increased by only 2 km/h (172 km/h). But the fuel consumption of the new Logan in the combined cycle reduced from 7.1 to 6.4 liters. per 100 km.

Cons of the H4M motor

Sedans and hatchbacks with the new engine will only be offered with a manual transmission. Modifications with a four-speed "automatic" will continue to equip the old K4M engine Spanish production, although the extra power would be better combined with an automatic. It would be logical to appear with a new engine and CVT, like the Kaptur crossover, but so far this is not even in the plans.

H4M Engine Repair

Applicability on cars

Budget car models Renault Logan 1.4 and Logan 1.6 for almost a decade of presence on Russian roads have managed to win the recognition of many thousands of motorists. The concept of the French manufacturer, which decided back in 1998 to create an inexpensive and practical passenger car designed for emerging markets, received the most triumphant continuation and unexpected development in Russia.

If in 2005 it all started on a small site of the Avtoframos enterprise in Moscow with a “screwdriver” assembly of several thousand cars a month, today the Volga Automobile Plant is already building its annual plans based on a whole “Logan” model scattering: Renault Logan, Renault Sandero, Lada Largus. Sales of these three models in the country in 2014 exceeded 160 thousand pieces.

To a large extent, such popularity of these Renault models was ensured by the use of proven and well-proven single-shaft internal combustion engines (ICE) of the K7J 1.4 l and K7M 1.6 l series as power units. The flagship of the line for Renault Logan, it is customary to consider a 16V four-cylinder liquid-cooled unit with the K4M index, the production of which, in addition to the parent company Renault Espana. It was also mastered at AvtoVAZ production sites. This 16-cap engine with decent technical characteristics is still equipped with other Renault models (Sandero, Duster, Kangoo, Megane, Fluence), as well as Lada Largus and Nissan Almera G11.

Design features and specifications of internal combustion engines

Engine design K7J (manufacturer Automobile Dacia, Romania) 1.4 l / 75 hp inherited from fairly old Renault Corporation engines of the 80s (ExJ series) and therefore looks somewhat archaic: here is an unusual oil pump chain drive used on units with lower camshafts, and ancient timing rocker arms.

The remaining solutions of the 1.4 engine are standard and do not differ in any way from other four-stroke 4-cylinder single-shaft engines of the SOHC type: the cylinder arrangement is in-line vertical, 2 valves per cylinder, timing drive from a toothed belt, liquid cooling and a combined lubrication system (lubrication is supplied to the most loaded parts of the internal combustion engine under pressure, to all others - by simple spraying). K7J is more than 400 thousand kilometers. Motor 1.4 provides the car with the following dynamics: the maximum speed is 162 km / h, it is gaining a hundred in 13 seconds.

Renault Logan K7M 710 engine and its successor K7M 800 (manufactured by the same Automobile Dacia) 1.6 l and 86 hp. (K7M 800 - 82 hp) are almost identical in design to the K7J, they also have, but they have a piston stroke increased by 10.5 mm, obtained by changing the height of the block.

A different clutch and flywheel (larger diameter) are also used, and the gearbox housing has minor reshaping. Resource K7M also exceeds 400 thousand km in mileage. Dynamic characteristics of the motor: speed at a maximum of 172 km / h, 100 km / h - in 11.9 sec unlike 1.4.

The greatest differences in design and performance are observed in the K4M engine, despite the fact that this ICE is 1.6 l and 102 hp. is also just another development of the K7M series. All-new 16-valve cylinder head with two lightweight camshafts and a new piston system. Here, finally, the need for constant adjustment of the internal combustion engine valves through fairly short runs is eliminated, eliminated by the simple use of well-known hydraulic compensators.

The motor accelerates the car to 100 km / h in 10.5 seconds, reaching a maximum of 180 km - not bad performance. There are no frankly weak points in this unit: the necessary changes have been made to the system in terms of the pump and thermostat, and the ignition module has also undergone refinement.

Advantages and disadvantages of power units

Thus, a detailed analysis of the technical characteristics of all three ICE models, as well as practical experience in operating Renault Logan with these power plants, allows you to decide which engine is better. The more powerful Renault Logan 2 1.6 liter liquid-cooled engine is still somewhat preferable to its “big brother” 1.4 liter. Power 75 hp just not enough for comfortable driving a loaded car, neither on a country road, nor in short "rushes".

And in the dispute between a 16V motor and an 8V motor, the undisputed leader is the first sample. The only characteristic in which 16V loses to its opponent is "elasticity". For the rest of the same characteristics, 16V is better better. Renault's liquid-cooled V16 engine is simply much more modern and gives more options to the driver.

Over the years of Renault's existence, the concern's products have been equipped with different engines. Since 1999, the K4M engine has been installed on the popular models of Logan, Sandero, etc., and some samples of the domestic model Lada Largus are also equipped with it.

Overview and Specifications

The next important point is the air filter, its condition directly affects the operation of the engine: the worse the air passes through the filter, the more the engine “suffocates”, loses power, and starts to work with failures. According to the regulations, the air filter should be changed every two years, or after about 30 thousand runs.

Air filter:

If the car is operated in a high dust content of the air, it needs to be changed more often.

The engine is quite sensitive to fuel and does not tolerate 92 grades well, although the manufacturer does not give a direct ban on 92 gasoline. It is advisable to pour high-quality fuel with an octane rating of 95 into the tank.

Candles are subject to regular replacement: according to the manufacturer's regulations, this is done every 30 thousand runs. The catalog number of the "factory" candles is 7700500155, but compatible ones are also allowed - EYQUEM EQ-RFC58LZ2E, etc., which can be found in the catalogs.

Tuning K4M

Car owners have learned to extract more power from this engine than in stock. Possible options for tuning the K4M 16V engine:

• The engine lends itself well to firmware, this can improve the dynamic and power performance of the motor, especially if the exhaust is modified in parallel to a catatless one.

Installing a compressor on K4M

• The motor is suitable for the installation of pressurization, for example, a PK-23 compressor, this will allow the unit to be boosted to about 145 forces. To do this, you will also need to replace the nozzles, put in a direct-flow exhaust, new shafts under the appropriate load, and install a control unit.

• More advanced tuning option. The operation is similar to installing a compressor, but instead a turbine is placed on the engine, for example, TD-04. More than 150 forces can be squeezed out of the engine.

It is important to remember forcing the engine reduces its resource, the more power, the less the engine will last.

Common Problems

Despite all the above advantages and simplicity of the device, the K4M engine has earned a reputation for being problematic among many car owners. There is a significant reason for this.

• Pulley problems. In 2010, a batch of K4M engines with a defective damper pulley was discovered on the Russian market. “Unlucky” for the owners of Sandero and Logan: cars equipped with these engines at one moment found a shaft of black smoke from under the hood.

The cause of the malfunction was a broken crankshaft pulley due to a collapsed damper spring. Often, along with this, the timing case melted, there was a jump / shift of the timing, bending of the valves, damage to the cylinder head, scuffing of the cylinders, damage to the engine pistons, etc. Moreover, this could happen on new cars, literally just from the salon. The problem was aggravated by the fact that if the breakdown occurred on the go, at speed, the driver lost the hydraulic booster, and the car turned into a poorly controlled projectile.

In total, the defect in 2010 was found on about 100 cars. The overhaul period was, on average, about a month. The engine manufacturer refused to recognize the trend towards marriage. And to this day, sometimes there are reports of a car breakdown on K4M with similar symptoms, although failure cases cannot be considered massive.

Common faults

• Motor troit.

Probably the ignition coils or spark plugs are out of order. They should be checked and replaced if necessary.

• "Float"

The cause may be a junky idle speed controller, a leaky air intake system (“leakage”), throttle contamination.

• Faulty phase regulator.

The resource of this block is about 100 thousand km, but replacement may be required earlier.

• Leaks of antifreeze and oil.

The most problematic places are the engine crankshaft oil seal and pump. It happens that the valve cover begins to “sweat” and even clearly leak.

• Icing of the motor with subsequent breakdown.

This problem affects some cars with a lack of design, and only in the cold. Snow can fall under the engine hood, it sits on the casing of the gas distribution mechanism and melts, the resulting water flows down to the bottom of the belt and freezes in a kind of growth. When the car is started, this "ice" gets under the gear, the timing jumps, and the valves hit the pistons.

The K4M gasoline engine first appeared in 1999. Since that time, Renault has installed this 16-valve engine on most of its own models, including Lada and Nissan cars. Since 2010, the power unit in the K4M 606/696/839 modification has been installed on Renault Duster and Megane.

The use of the power unit

The K4M engine is installed on the following vehicles (unit code / generation of the car / year of manufacture):

• Logan (690/1/since 2006);
• Laguna (710/2/2001-2005);
• Scenic (782/2/2003-2009);
• Megane (848/3/s 2008);
• Megane (788/2/2002-2008);
• Duster (812, 813, 858/1/s 2010).

The third generation Renault Megane also uses the K4M 848 engine. In addition, since 20102 Lada Largus in the Luxe version has been equipped with a similar unit.

The K4M engine code defines the technical specifications of the latter.

Specifications

Regardless of the type of car, the models of the French brand are equipped with a 1.6-liter Renault K4M engine. An in-line unit of this type runs on gasoline and is installed transversely.

The motor installed on the Renault Duster crossover has the following characteristics:

• power - 115 hp (version without phase regulator produces 102 hp);
• torque - 145 N / m at 3750 rpm;
• gasoline consumption (city / highway / combined cycle) - 9.8 / 6.5 / 7.6 liters;
• cylinder diameter - 79.5 mm;
• piston stroke - 80.5 mm.

On other models, the power of the K4M motor varies between 100-115 hp. The engine consumes AI-92 gasoline. Oil consumption for every 1000 km reaches an average of 0.5 liters.

Renault engine design

The Renault K4M engine includes:

• 4 cylinders;
• intake and exhaust valves;
• monolithic cast iron block and other elements.

The movement of the camshafts is provided by a toothed belt. The valves are actuated by means of roller rockers, or rockers, and hydraulic pushers. An electronic system is responsible for the distribution of gasoline injection. The cylinder head is made of aluminum alloy, which has a positive effect on the performance of the motor. Oil (5W-40, 5W-30) is supplied to the cylinders either under pressure or by splashing. Motor cooling is provided by a system that provides a forced flow of fluid.

The intake and exhaust valves differ in the following characteristics:

• diameter and length of the first - 32.5 and 109.32 mm;
• diameter and length of the latter - 28 and 107.64 mm;
• rod - 5.5 mm.

Hidden inside the K4M engine is a 128mm forged steel connecting rod and 79.465-79.475mm pistons.

The design feature of the motor is that the pressed cams are fixed to the steel pipe. In addition, the manufacturer, having strengthened the pistons, filled in steel inserts, which are located near the upper compression rings. A similar approach to the design of motors is used by companies that produce expensive cars (Mercedes-Benz and others).

Features of operation and resource

The manufacturer does not exactly indicate what resource the Renault K4M engine is. In real conditions, the motor can withstand a run of 350-400 thousand km. However, every 60 thousand km requires the replacement of the timing belt with rollers. Simultaneously with the gas distribution mechanism, it is necessary to install a new water pump. To replace the last part, disassembly of the timing is required.

An important feature of the K4M engine is that AvtoVAZ, which installs this power unit on Lada Largus, requires a new timing belt to be installed every 120 thousand km.

According to the operating conditions of the motor, air filters should be replaced every 2 years or after 30 thousand km. Candles have a similar operational resource.

Typical Renault engine malfunctions

Despite the fact that the Renault K4M engine handles loads well and consumes relatively little fuel, French car owners often face the following problems:

• filling the valve covers with oil;
• noisy manual transmission;
• "floating" turns;
• engine troit;
• the timing belt quickly fails;
• leakage of glands;
• ignition coil failure;
• accessory belt failure.

Fogging of valve covers with oil is observed after a run of 70-100 thousand km. This problem occurs due to a violation of the density of the sealant. To eliminate the malfunction, it is enough to remove the cover and remove the old material. Then a new sealant is applied and all elements are fixed. This malfunction is eliminated under warranty during the first three years of vehicle operation. Replacing the sealant takes about 5 minutes.

The second most common problem is the need to replace the timing belt. This component quickly fails under the influence of external factors. It is important to replace the belt in a timely manner. Otherwise, the valves are bent.

If the seals begin to leak, then this indicates incorrect installation of the components. This problem often occurs after 100 thousand kilometers.

Failure of the ignition coils is due to insufficient protection against dirt and water. This problem is mainly of a nature for the first generation Renault Duster model. The fault lies in the seals, which poorly seal the cavity between the coil and the landing plane.

The appearance of “floating” revolutions is explained by a faulty ignition coil, a phase regulator mechanism or a crankshaft position sensor. To fix the problem, you will need to replace one of the indicated components.

Also, a faulty ignition coil is often the reason why the engine troit. A similar problem occurs due to defective spark plugs, injectors, timing, or a piston group.

The accessory belt, like a number of other engine components, requires replacement with a certain regularity. In this case, the frequency directly depends on the degree of wear of this element. Untimely replacement of the belt leads to failure of the motor.

Conclusion

The Renault K4M engine is a reliable unit that has a long service life and maintainability. The power plant, subject to the timely replacement of the timing belt and other elements, operates for 350-400 thousand km. The engine may fail due to poor-quality gasoline, rapid wear of components, or errors during installation of the latter.

Video

K4M motors with a volume of 1.6 liters. Renault has been producing since 1999. At its core, the K4M engine has a cast iron block, two camshafts and four valves for each of the four cylinders, which are arranged in a row. Camshafts are lightweight thanks to cams that are pressed onto a steel pipe. The pistons were made stronger by engineers with a height of 31.7mm. and a diameter of 79.47mm. The connecting rods in the design of the motor used forged steel, 128.0 mm long. Depending on the modification of the K4M motor, there are both with a phase regulator - this is an engine power of 110-115 hp, and without it - this is 102 hp. The compression ratio also varies from 9.5 to 10.0. The K4M cylinder head is made of aluminum alloy. The camshafts are driven by a belt. When the belt breaks, the valves bend and, as a result, are expensive. The engine valves are driven by camshafts using rockers and hydraulic lifters, which automatically provide backlash-free contact between the camshaft cam and the valve. The value of the diameter of the plate of the inlet valve of the motor is 32.5 mm., the exhaust valve is 28.0 mm. The stem diameter of both valves is 5.5mm. The intake valve length is 109.32mm, and the exhaust valve is 107.64mm. As a cooling system, the engineers chose a liquid closed type with forced circulation.

Now a few words about modifications... There are really a lot of modifications and it makes little sense to list them all. The only thing that can be mentioned is that the numerous indexes that are added after the name of the K4M engine can talk about gearbox types, compression ratios, environmental standards, as well as many other parameters that apply to each car individually.

Renault Clio II, Duster , Kangoo I and II, Laguna I and II, Logan , Megane I, II and III, Sandero, Scenic I and II, Twingo II, Wind, Nissan Almera III and attention... Kada Largus.

As for the little second-generation Renault Twingo and the Renault Wind roadster, these cars were equipped with a special and most powerful engine - the K4M with the RS index. This engine produced 133 hp. at 6750 rpm.

The engine that succeeded the K4M engine can be called the H4M (HR16DE). H4M is a more technologically advanced engine that was installed on many models of the Renault-Nissa alliance, including Lada cars.

Typical sores and disadvantages of the K4M 1.6L internal combustion engine:

floating turns. As a rule, the problem lies in the throttle valve o-ring - this is the junction of the manifold with the throttle. The problem can be solved by replacing this ring. Part code: 8200068566 . At the same time, you can change the sealing ring on the side of the air filter under the article number 8200068583 . The cause of the floating speed can also be the ignition coils or the crankshaft position sensor.