The Renault Logan 1.6 engine 8 valves appeared in our country together with the first generation Renault Logan. Initially, the K7M petrol power unit produced 87 horsepower, but today the same engine has 82 horsepower. There is no error in this difference. The fact is that in 2005 the motor complied with the Euro-2 environmental standards, and today it complies with the Euro-5 standard. The power unit was made more environmentally friendly, but the readjustment deprived Logan's engine of several horsepower.

Engine specifications Renault Logan 1.6 8 valves

Displacement - 1598 cm3 Number of cylinders - 4 Number of valves - 8 Bore - 79.5 mm Stroke - 80.5 mm Timing drive - belt Power HP (kW) - 87 (64) at 5500 rpm. in min. The torque is 128 Nm at 3000 rpm. in min. Maximum speed - 175 km / h Acceleration to the first hundred - 11.5 seconds Fuel type - gasoline AI-92 Fuel consumption in the city - 10 liters Fuel consumption in the combined cycle - 7.3 liters Fuel consumption on the highway - 5.8 liters The engine has a long resource and is completely unpretentious ... The main thing is to change the timing belt in time, which is perhaps the main weak point of the motor.

Pluses of the K7M Renault Logan 1.6 engine 8 valves

✔ low price and reliability of engine design; ✔ reliability: the confirmed motor resource is more than 400 thousand km; ✔ universal and repairable; ✔ easy to maintain; ✔ have high torque; ✔ good "elasticity" of the motors is provided, equal to 1.83.

Cons of the K7M Renault Logan 1.6 engine 8 valves

✔ relatively high fuel consumption; ✔ there is an instability of revolutions when idling; ✔ there are no hydraulic lifters 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 case of a sudden breakage of the timing belt; ✔ crankshaft oil seals often leak; ✔ low reliability of the cooling system; ✔ very noisy and prone to vibrations.

If all routine maintenance is performed in a timely manner and in accordance with the manufacturer's recommendations, then the engine resource can reach 400 thousand km, which is confirmed by numerous real examples. The only unpleasant surprise may be a broken timing belt, as evidenced by reviews. In the event of such an accident, the pistons collide with the valves, causing them to bend or be completely destroyed.

Renault Logan 1.6 engine 8 cl. gasoline, four-stroke, four-cylinder, in-line, eight-valve, with an overhead camshaft. The order of operation of the cylinders: 1-3-4-2, counting from the flywheel. Supply system - MPI distributed fuel injection. The engine with the gearbox and clutch form the power unit - a single unit secured in the engine compartment on three elastic rubber-metal bearings. The right support is attached to the bracket on the top cover of the timing belt, and the left and rear support to the gearbox housing. The engine block is cast from cast iron, the cylinders are bored directly into the block. The nominal cylinder diameter is 79.5 mm. In the lower part of the cylinder block, there are five main bearings of the crankshaft with removable covers, which are attached to the block with special bolts. The holes in the cylinder block for the bearings are machined with the covers installed, therefore the covers are not interchangeable and are marked on the outer surface to distinguish them (covers are counted from the flywheel side). On the end surfaces of the middle support, there are sockets for thrust half rings that prevent axial movement of the crankshaft. Earbuds the main and connecting rod bearings of the crankshaft are steel, thin-walled with an anti-friction coating applied to the working surfaces. Crankshaft with five main journals and four connecting rod journals. The shaft is equipped with four counterweights, cast in one piece. To supply oil from the main journals to the connecting rods, channels are used, the outlet openings of which are closed with plugs. At the front end (toe) of the crankshaft are installed: an oil pump drive sprocket, a timing gear (timing) drive pulley and an auxiliary drive pulley. There is a projection in the hole of the toothed pulley, which enters the groove on the toe of the crankshaft and fixes the pulley from turning. The accessory drive pulley is similarly fixed on the shaft.

Cylinder head Renault Logan 1.6 is cast from aluminum alloy, common to all four cylinders. It is centered on the block with two bushings and secured with ten screws. A non-shrinkable metal gasket is installed between the block and the head. At the top of the cylinder head there are five camshaft bearings (bearings). The supports are made one-piece, and the camshaft is inserted into them from the timing drive side. The camshaft is driven by a toothed belt from the crankshaft. A groove is made in the extreme bearing journal of the camshaft (from the flywheel side), into which a thrust flange enters, which prevents axial movement of the shaft. The thrust flange is attached to the cylinder head with two screws. From above to the camshaft supports are five bolts attached to the valve rocker shaft. The rocker arms are kept from displacement along the axis by two brackets, which are fastened with the rocker arm axis bolts. Screws are screwed into the rocker arms, which serve to adjust the thermal clearances in the valve actuator 5. The adjusting screws are secured from loosening by locknuts. The valve seats and guides are pressed into the cylinder head. On top of the valve guides, the valve stem seals are fitted. Steel valves, arranged in two rows, inclined to the plane passing through the cylinder axes. In front (in the direction of the vehicle) there is a row of exhaust valves, and in the back there is a row of intake valves. The intake valve disc is larger than the exhaust valve. Valve opens with a rocker, one end of which rests on the camshaft cam, and the other, through an adjusting screw, on the end of the valve stem. The valve is closed by a spring. With its lower end, it rests on a washer, and with its upper end, on a plate, which is held by two crackers. The folded crackers on the outside have the shape of a truncated cone, and from the inside they are equipped with stop collars that enter the groove on the valve stem.

Renault Logan engine lubrication combined. The main and connecting rod bearings of the crankshaft and the camshaft bearings are lubricated under pressure. Other engine components are spray lubricated. The pressure in the lubrication system is generated by a gear oil pump located at the front in the oil pan and attached to the cylinder block. The oil pump is driven by a chain drive from the crankshaft.

The timing drive on Renault Logan 1.6 8 valves is carried out according to the following scheme (image just above) - the torque from the crankshaft pulley is transmitted to the camshaft pulley by rotating the coolant pump pulley. The belt is tightened with a special roller that changes with the timing belt. If the belt breaks, the valve bends. Therefore, in accordance with the vehicle maintenance regulations, we check the condition of the belt every 15 thousand kilometers. The surface of the toothed part of the belt should not have folds, cracks, undercuts of teeth and peeling of fabric from rubber. The underside of the belt should be free of wear, exposing the cords, and burn marks. There should be no delamination or fraying on the end surfaces of the belt. The belt must be replaced if traces of oil are found on it. Regardless of the condition of the Renault Logan timing belt, it must be replaced every 60 thousand km.

Renault Logan / Sandero 1.6 K7M engine reliability, problems and repair

Renault Logan K7M 710 1.6 engine 86 h.p. nothing more than an ordinary K7J 1.4 liter, only with an increased piston stroke (from 70 to 80.5 mm), of course, the block height increased slightly, the clutch of a larger diameter, the flywheel increased and the shape of the gearbox housing changed. Structurally, the 1.6 liter Logan engine, like its low-volume counterpart, has the same archaic design of the middle of the last century with rocker arms and a strange oil pump drive system from lower shaft Renault motors of the 60s. In spite of everything, with a careful attitude to the engine, service and maintenance, oil change 2 times more often than according to the instructions, it is very, very reliable, according to internal plant data, the resource of the Logan 1.6 engine is about 400 thousand km, in practice the engine drove a little more ... In 2010, the K7M 710 was replaced with a K7M 800, the motor was strangled, brought up to the Euro-4 environmental standard, the power dropped to 83 hp, and there were no design changes. The disadvantages of the K7M are the same as those of the K7J 1.4 engine, high fuel consumption, often at idle speed starts to float, constantly (every 20-30 thousand km) you need to adjust the valves, there were no hydraulic lifters, the timing drive belt, when the belt breaks at Logan 1.6, the valve bends, so every 60 thousand km we change the belt. All the same crankshaft oil seal leaks. The motor is noisy and vibrations are present. On the structure of the Renault Logan 1.6 engine and where the engine number is located, the information is set out in the article "K7J engine", which, apart from the volume and related changes, has no other changes. All malfunctions and the reasons for their occurrence are also described there. Speaking about which engine on Renault Logan is better than 1.4 or 1.6 8 valve, take 1.6 ... the engine is the same, but the low capacity is very weak. Also, on the basis of K7M, the K4M engine was created with a 16-valve cylinder head and other significant innovations, the power of such a motor is significantly higher and if you choose (for example, Logan, Sandero), always take it, you will not regret it.

Renault Logan K7M 1.6 engine tuning

Chip tuning Renault Logan engine The Logan K7M 800 engine, you can remove the catalyst, return its original power to 86 hp, put the exhaust and flash the sport with firmware, maybe add a couple more horses and add, but nothing will change significantly except fuel consumption, now your engine will eat more.

Renault Logan 1.6 engine 8 valves repair (video)

The engine of the new Renault Logan in Russia it has one volume of 1.6 liters, but two versions with 8 and 16 valves. Accordingly, the power of one power unit is 82 hp, the other 102 horses. The diameter and piston stroke of these power units are the same, the difference is hidden in the cylinder head. One cylinder head has one camshaft, a more powerful engine has two camshafts.

These power units are already well known to buyers of the old version of Renault Logan. In Europe, these outdated engines have been replaced by smaller, more modern engines with significantly lower fuel consumption. So European buyers of the new Logan are offered 4 and 3-cylinder engines with a working volume of only 1.2 and 0.9 liters, respectively. The first motor has 16 valves, and the three-cylinder has 12 valves. Plus the time-tested Renault diesel with a working volume of 1.5 liters, all these engines are very economical, although not so powerful.

Photo of a 16-valve engine under the hood of the new Renault Logan see below.

Technical characteristics of the gasoline engine Renault Logan 1.6 (16-cl.)

• 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
• Power h.p. - 102 at 5750 rpm
• Power kW - 75 at 5750 rpm
• Torque - 145 Nm at 3750 rpm
• 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

Technical characteristics of the gasoline engine Renault Logan 1.6 (8-cl.)

• 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
• Power h.p. - 82 at 5000 rpm
• Power kW - 60.5 at 5000 rpm
• Torque - 134 Nm at 2800 rpm
• Engine power supply system - electronically controlled multipoint injection
• Compression ratio - 9.5
• Timing drive - belt
• Maximum speed - 172 kilometers per hour
• Acceleration to the first hundred - 11.9 seconds
• Fuel consumption in the city - 9.8 liters
• Combined fuel consumption - 7.2 liters
• Fuel consumption on the highway - 5.8 liters

It is worth noting that the real consumption of power units in the urban environment of the new Renault Logan is much higher. Keeping within 10-11 liters is quite difficult, especially if there are several passengers in the sedan's cabin, besides the driver.

Renault Logan 2 gearbox, this is a mechanical unit that was also on the ranks of the Logan version. The front-wheel drive transmission of the state employee is quite reliable and provides good handling of the car on the bad roads of our country. Don't forget about the impenetrable suspension

• Gearbox model - BVM5
• Gearbox type - mechanical
• Number of gears - 5
• The gear ratio of the main transfer - 4.5
• first gear - 3.727
• second gear - 2.048
• third gear - 1.393
• fourth gear - 1.029
• fifth gear - 0.756
• reverse gear ratio - 3.545

Technically, the new Logan remained the same, the main components and assemblies migrated from the old version of the car. But to everything else, the ability to install new security systems, climate control, cruise control, a multimedia system with a large touchscreen monitor, seat height adjustments was added. By the way, now the rear seats are folded in proportions of 70 to 30, providing additional opportunities for transporting oversized cargo. In general, the update of the budget sedan made Logan in a new body more practical and modern, at a very affordable price.

Just recently, I myself went to salons and websites with a headache in search of a car to replace my 2000 GAZ-3110. Volga served me faithfully for 3 years and started up even at minus 38 with almost half a turn. Before her, I also drove our cars: VAZ-2106, IZH-ODA 1.6, VAZ-2111, and they all turned out to be solid and hardy cars. I licked my lips a lot on Toyota, but it turned out a little expensive. On February 10 of this year, I got a gift for the day of jam and the whole family became the owner of a brand new Logan at maximum speed, and even with a 16-valve engine, which is a novelty for Logans ... Nonsense !!! (I had a Volga with 16 valves, albeit an ancient one).

Why Logan? I did not consider it as a car for purchase at all, but the updated appearance, financial restrictions, reliability and spaciousness in the cabin did their job. In fact, 473 rubles is a rather large amount and you can buy a BU, as many advised. However, I needed a NEW one !! suspension and indestructible, like the Volga, so that it could withstand the onslaught of the lack of roads in the city. With its "modest" dimensions of 185/95, I comfortably settled only in it. And then, after the spacious Volga, I don't feel like getting into a cramped car.

During the month of operation, the car covered 2.5 thousand km. Up to 1000 km, apparently, there was an electronic limiter, tk. the engine did not spin much, although moving around comfortably in the city, without straining the neighbors in the shop, can be spinning up to 2500-3000 rpm. From the test Logan with an 8-valve engine, mine really was no different. At some point after 1000 km the engine woke up and started singing. After 2000 km of run, he began to twist it. What to say? For me, a car with this engine is just a fairy tale. Up to a hundred, and in other matters and further up to 145 km / h (I have not accelerated more, and there is nothing to it) it accelerates easily and naturally, and this is very pleased.

You get used to short speeds quickly. You can use two gears around the city: 1st and 3rd (or 4th, depending on the manner of movement). At the bottom, the car is very high-torque. On the track, you can ride and overtake comfortably in one 5th gear. The steering wheel is sharp, 2.5 turns from rebound to rebound. Fuel consumption by computer: in the combined cycle 8.5-9.2 l / 100 km, purely city (active driving + traffic jams) - above 11.2, taking into account all the warming up, there has not yet been a pure track - 6.2 liters at a speed of 80-110 km / h Please take into account that Logan is still more of a city car and it is undesirable to arrange races on it, although he will go 170 km / h with ease.

You can also write about the shortcomings, but they are insignificant, subjective and fit into the price / quality ratio of this car. Many people write that the brushes are bad. Maybe, but with others in winter it will be a little better (already tested). The point here is that the zone of rest of the brushes is not blown by warm air and everything there quickly freezes over (this is structurally done). So get ready to jump out at traffic lights for cleaning or find heated brushes;) There are no breakdowns and, I hope, for the next 150 thousand mileage is not expected, and then we will see.

The bottom line is this. Who needs a reliable, solid workhorse, playful, economical and comfortable enough, for relatively little money, then you can take a closer look at the updated Logan. Appearance has always been a subjective category, but it turned out that a "gift" horse does not look in the mouth :) My whole family is happy with this acquisition and it pleases.

Renault Logan - this budget car is considered by many to be the standard of simplicity, reliability and cost of operation. But it is these qualities that are decisive when buying a car in this segment. So what are the technical specifications of the model? Do they fully meet the requirements of car dealership customers? (See also the general ones on our website).

Engines

Logan has a pair of powertrains. These are 1.6-liter naturally aspirated engines with no direct injection or turbocharging. It is noticeable that the designers proceeded from the principle of maximum simplicity and reliability. It is noteworthy that in the Old World, both of these engines have already been sent "to rest", and their place has been taken by new engines with a volume of 0.9 liters and 1.2 liters.

82 l. from.

This is a 1.6-liter power unit of the K7M series, in-line layout and with mediocre tech. data. It is equipped with 4 cylinders and 8 valves, distributed fuel injection, equipped with an electronic control system, and one camshaft. The cylinder diameter is 79.5 mm, with a piston stroke rate of 80.5 mm. The compression ratio in such an engine is 9.5 units. It does not have a timing chain - only a belt.

This arrangement allows the power unit to develop a capacity of 82 liters. sec., which can be obtained in the upper range - at 5000 rpm. But the torque is not bad - its 134 "newtons" of thrust are available in the running range itself - at 2,800 rpm.

With similar technical characteristics, the engine accelerates Renault to a hundred in 11.9 seconds. Of course, the indicator is not the best, but tolerable. At the same time, the maximum speed reaches 172 km / h. Consumption is quite high - 9.8 liters in the city.

102 l. from.

This K4M series engine also has a 1.6 liter displacement. The main difference, which is the reason for the higher return, is the presence of 2 camshafts in the engine design, as well as a twice as many valves - 16 units instead of 8. Otherwise, its design repeats the previous version - in-line layout, 4 cylinders and electronically controlled distributed fuel injection. The drive also uses a traditional belt.

The compression ratio is slightly higher here - already 9.8 units. On the other hand, the bore and stroke figures remained unchanged - 79.5 mm and 80.5 mm, respectively.

Thanks to the structural changes made, the engineers managed to significantly increase the power - up to 102 horses, although this had to be paid for by increasing the peak to 5,750 rpm. And the thrust has not grown so much - up to 145 Nm of torque, and its peak has risen to 3,750 rpm.

This made it possible to significantly improve the dynamic characteristics of Renault, bringing the acceleration to hundreds to 10.5 seconds, and the maximum speed to 180 km / h. Consumption in such conditions (in the city) is 9.4 liters.

Such solutions allowed engineers to achieve almost all goals - to create a simple, reliable and inexpensive unit in operation with acceptable technical specifications. indicators. But with the fuel consumption, an overlay came out, since the official data does not reflect the real picture. After all, she testified that the appetite is in a traffic jam, and even when there are 3-5 people in the cabin, it easily reaches 11 liters. And this is too much for a 1.6-liter volume! So in a metropolis, even a 50-liter tank is unlikely to be able to provide a rare visit to a gas station.

Checkpoint

The manual transmission, which showed itself very well on the old Renault Logan, was decided not to be touched by the experts. Its technical characteristics ensure correct engagement of gears, clarity and short stroke, and the gear ratios are very well selected:

1st gear - 3,727 units;
2nd gear - 2,048 units;
III gear - 1,393 units;
IV gear - 1,029 units;
V gear - 0.756 units;
Reverse - 3,545 units.

There were no questions about reliability, as a result of which the designers found this transmission acceptable.

But there is no automatic transmission even in the top-end configuration. Of course, in the city it would be much easier with it, but the consumption in this case would not at all fit into a reasonable framework.

Chassis

The suspension in Logan is the most simple thing. Her tech. the characteristics are quite ordinary - it is an independent structure on the front axle, equipped with shock absorbers of the McPherson type, as well as a torsion bar and a semi-dependent scheme at the stern. Supplemented with a set of anti-roll bars. Disc brakes are only on the front axle, while at the rear, drivers will have to be content with drum brakes, regardless of the configuration. The steering is equipped with a hydraulic amplifier.

This chassis layout is extremely simple and cheap. And the suspension itself, as the experience of the previous generation showed, turned out to be extremely reliable. In addition, it is quite comfortable to move around - not too dense, but not imposing either.

Outcome

As you can see, the technical data of Renault Logan is quite consistent with the declared value. 1.6-liter engines are simple and reliable, the gearbox is clear and time-tested, and the suspension is quite good. The only frustrating thing is the high fuel consumption.

Today we will 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 h.p. - model K7M
• 16 valve engine with a volume of 1.6 liters. and power 102 h.p. - model K4M
• new 16 valve 1.6 liter engine. and power 113 h.p. — H4M

Let's 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
• Power h.p. - 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

Pros of the K7M engine

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

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, therefore, it is necessary to constantly adjust the valves (after 20-30 thousand km);
• there is a possibility of valve bending in case of a sudden breakage of the timing belt;
• crankshaft oil seals often leak;
• low reliability;
• very noisy and prone to vibrations.

Repair of the K7M engine

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

K4M - Renault Logan 1.6 liter engine. 16-valves 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
• Power h.p. - 102 at 5750 rpm
• Power kW - 75 at 5750 rpm
• Torque - 145 Nm at 3750 rpm
• Engine power supply system - electronically controlled multipoint injection
• 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

Pros of the K4M engine

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

Compared to 8-valve motors, the K4M 16V is much quieter, vibration-free and has the same resource, but significantly more power and torque.

Cons of the K4M engine

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

Repair of the K4M engine

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

H4MK - Renault Logan 1.6 liter engine. 8-valves 113 HP

In 2104, a new 16-valve 1.6-liter engine was installed on the Renault Logan 2 of the Togliatti assembly. Atmospheric engine Н4М (or HR16 according to Nissan classification) has a power of 113 hp. and is also installed on Renault Duster, Captyur, Lada XRae, Nissan Sentra and Nissan Beetle.

It differs from the previous generation K 4M engine (volume 1.6 liters, power 102 hp) by increased torque (152 versus 145 Nm), but the maximum torque is reached at 4000 rpm instead of 3750 rpm. The new Renault Logan 2 engine is built 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
• Piston stroke - 83.6 mm
• Power h.p. - 114 at 6000 rpm
• Power kW - 83.8 at 6000 rpm
• Torque - 142 Nm at 4000 rpm
• Engine power supply system - electronically controlled multipoint injection
• 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

Pluses of the H4M motor

The main advantage of the new engine is improved elasticity and increased traction at low revs. But there is absolutely no increase in dynamics when driving. The maximum speed has 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. 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 the automatic. It would be logical to appear with a new motor and variator, like the Kaptyur crossover, but so far this is not even in the plans.

H4M engine repair

Applicability on cars

The budget car models Renault Logan 1.4 and Logan 1.6 have won the recognition of many thousands of motorists over the nearly ten-year history of their presence on Russian roads. The concept of the French manufacturer, who decided back in 1998 to create an inexpensive and practical passenger car intended for emerging markets, in Russia received the most triumphant continuation and unexpected development.

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 Volzhsky Automobile Plant is already building its annual plans, relying 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 single-shaft internal combustion engines (ICE) of the K7J 1.4 l and K7M 1.6 l series as power units on them as power units, proven and well-proven on other machines of the 8V concern. The flagship of the line for Renault Logan, it is considered to be a 16V four-cylinder liquid cooling 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. Other Renault models (Sandero, Duster, Kangoo, Megane, Fluence), as well as Lada Largus and Nissan Almera G11 are still equipped with this 16-drip engine with decent technical characteristics.

Features of the design and specifications of the internal combustion engine

The design of the K7J engine (made by Automobile Dacia, Romania) 1.4 l / 75 hp. inherited from the rather old engines of the Renault corporation of the 80s of development (ExJ series) and therefore looks somewhat archaic: here there is an unusual chain drive of an oil pump, used on units with a lower camshaft, and ancient timing rocker arms.

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

The Renault Logan K7M 710 engine and its successor K7M 800 (produced by the same Automobile Dacia) 1.6 liters and 86 hp. (K7M 800 - 82 hp) in design almost completely coincide with the K7J, they also have, but have a piston stroke increased by 10.5 mm, obtained by changing the block height.

A different clutch and flywheel (larger diameter) is also used, and the gearbox housing has minor shape changes. 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 liters 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, and is 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 at all. 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, the ignition module has also been revised.

Advantages and disadvantages of powertrains

Thus, a detailed analysis of the technical characteristics of all three ICE samples, as well as practical experience in operating Renault Logan with these power plants, allows you to decide which engine is better. A more powerful engine Renault Logan 2 1.6 l with liquid cooling is still somewhat preferable to its "big brother" 1.4 l. Power 75 hp just not enough for comfortable control of a laden car neither on a country road, nor in short "dashes".

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