Engines of the Renault Logan model, endowed with a working volume of cylinders of 1.6 liters and characterized by two power options: 82 and 102 liters. with., the most common in the vastness of the domestic car market among the entire list of modifications of this model. These motors have proven to be reliable and maintainable. The engine resource is very long. They can please the owner with such relevant advantages that meet the requirements of advanced engine building, such as:
- reliability of elements in the cooling system;
- increased engine resource;
- compliance of the maximum power indicator with modern trends in the automotive industry.
This is evidenced by numerous reviews of the owners.
About the history of development and design features of the units
The 1.6 and 16-valve engine differs from the newest modifications, they are the absence of a valve timing control mechanism, such an engine device significantly reduced the dynamic capabilities of the car. But among the advantages remained excellent maintainability and durability, that is, an increased engine resource, thanks to simple constructive solutions from the manufacturer.
The engine is equipped with a 1.4-liter 8-valve engine, which confirms the identity of the layout and the similarity of the design aspects of both engines.
The changes affected the following nodes and systems:
- the volume of cylinders has increased (engine 1.6 l.), which made it possible to increase the power paired with the moment and improve the dynamic characteristics of the model;
- the output of the unit increased by 11% (up to 82 "horses" in the 8-valve version), such a device of the engine led to an increase in torque to 132 Nm;
- the cooling system has undergone adjustments (the need for this revision is caused by an increase in engine power);
- the cooling circuit did not receive fundamental design changes, and its elements were modified in order to achieve greater performance, for which some new components were integrated, which led to an increase in the resource and efficiency of the system, especially at critical operating modes;
- power increase up to 102 liters. with. achieved thanks to the use of new components in the units of the cylinder-piston group and the valve mechanism:
- the number of valves doubled (from 8 to 16), which ensured better filling of the combustion chambers with the mixture and led to an increase in power and dynamic capabilities;
- the resource of the motor has significantly increased due to the use of parts from new, more durable alloys;
- after applying the previously indicated design solutions in the updated engines, Renault Logan developers managed to achieve significant fuel efficiency:
- 1.5 liters at a distance of 100 km on a 1.6 engine with 16 valves;
- 1.0 liter in the case of 8-valve engine versions.
All these innovations made it possible to make a 1.6 liter engine to a significant extent. more modern (especially the 16-valve version), the engine life has become higher. Although the developers did not use progressive and innovative design solutions, this engine upgrade for Renault Logan still allowed attracting a large army of new potential customers to the updated model.
In addition to constructive innovations, these units began to meet the requirements of Euro-5 environmental standards. In the future, the model manufacturer Renault Logan planned to bring the engine device to the level of compliance with Euro 6/7 standards.
The update of the 1.6-liter unit was not limited to the use of a 16-valve head mechanism. Achievement of an increase in traction and power characteristics was carried out thanks to significant transformations, including:
- increasing the level of performance of the intake and exhaust systems, which was a necessary measure to bring engines to the advanced level of environmental standards;
- the use of new elements in the cooling circuit, which made it possible to significantly improve the efficiency of its functioning;
- replacement of the generator with a version of increased performance for the Renault Logan model, which made it possible to cope with the increased loads on this node (now the power varies from the model configuration)
On the durability and maintainability of motors
The operating experience of 1.6-liter engines did not reveal significant shortcomings in both modifications of 8 or 16 valves (16-valve with 102 hp and 8-valve - 82 "forces"). According to the manufacturer, the resource of these units is approximately 200 thousand km, and what value this parameter will have in reality depends on the owner of Renault Logan. Accordingly, the reviews of car owners on this matter are positive.
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.
Summing up
The considered power units of 8 or 16 valves are traditionally for the French manufacturer of all models, including Renault Logan, are unpretentious in operation and wear resistance. In terms of dynamic characteristics, these motors are not "sporty", but they will not allow the owner to lag behind the intense traffic on the road. Thanks to their balanced performance, 8 or 16 valve engines have earned the trust of many Renault Logan enthusiasts. Their reviews are very, very positive. There have been cases when motors failed with runs of 100 thousand km due to defects in the crankshaft liners, but these precedents were not characterized by mass.
Renault Logan 1.6 engine liter 86 horsepower was installed on the first generation Logan budget sedan. This is a fairly simple 8-valve engine with a cast iron cylinder block (with an aluminum sump) and a timing belt. Today we will tell you in detail about the characteristics and features of this motor. Renault K7M 710 engine has a rather archaic design. Simplicity and reliability are exactly what you expect from an inexpensive car. According to the manufacturer's assurances, with proper care, the motor resource can be more than 400 thousand kilometers. 
Renault Logan 1.6 engine device
The power unit is 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. The power supply system is MPI distributed fuel injection (Euro-2 toxicity standards).
Renault Logan 1.6 engine with a gearbox and clutch form a power unit - a single unit fixed in the engine compartment on three elastic rubber-metal bearings. The right support is attached to the bracket on the upper 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 crankshaft main bearing supports 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, sockets are made for thrust half rings that prevent axial movement of the crankshaft.
The liners of 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 accessory drive pulley. There is a protrusion in the hole of the toothed pulley that fits into the groove on the toe of the crankshaft and fixes the pulley from turning. Similarly, it is fixed on the shaft and the accessory drive pulley.
Renault Logan 1.6 engine cylinder head
Renault Logan 1.6 Cylinder Head- 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. There are five camshaft bearings (bearings) on the top of the cylinder head. 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, the valve rocker shaft is attached with five bolts. The rocker arms are held against 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 drive 5.
The adjusting screws are secured against loosening with locknuts. The valve seats and guides are pressed into the cylinder head. On top of the valve guides, the valve stem seals are put on. The valves are made of steel, arranged in two rows, inclined to the plane passing through the axes of the cylinders. 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 inlet valve disc is larger than the outlet valve.
The valve is opened by 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 persistent collars that go into the groove on the valve stem
Renault Logan 1.6 engine oil pump
Oil pump Renault Logan 1.6 has a rather archaic design inherited from older engine models such as the Renault ExJ. Chain pump drive. The drive sprocket for the pump drive is mounted on the crankshaft under the front cover of the cylinder block. A cylindrical belt is made on the sprocket, along which the front crankshaft oil seal works. The sprocket is installed on the crankshaft without interference and is not secured with a key. When assembling the engine, the pump drive drive sprocket is clamped between the timing gear pulley and the crankshaft shoulder as a result of tightening the package of parts with the accessory drive pulley mounting bolt. The torque from the crankshaft is transmitted to the sprocket only due to the frictional forces between the end surfaces of the sprocket, toothed pulley and crankshaft.
Timing drive Renault Logan 1.6 engine
Renault Logan 1.6 gas distribution mechanism drive diagram can be seen a little higher in the photo. Failure of the timing belt (timing belt) (breakage or cut of the teeth) will lead to the valves sticking into the pistons due to the mismatch of the angles of rotation of the crankshaft and camshaft and, as a result, to expensive engine repairs. That is when the timing belt breaks on Renault Logan 1.6, the valve bends! Therefore, in accordance with the vehicle maintenance regulations, we check the condition of the belt every 15 thousand kilometers. Since the spark plugs also need to be changed after 15 thousand km, it is better to combine these works, because it will be easier to turn the crankshaft when checking the belt. 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 signs of burning. 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 1.6 timing belt, it is necessary replace every 60 thousand km of run.
Renault Logan 1.6 engine specifications
- Working volume - 1598 cm3
- Number of cylinders - 4
- Number of valves - 8
- Cylinder diameter - 79.5 mm
- Piston stroke - 80.5 mm
- Timing drive - belt
- Power hp (kW) - 86 (64) at 5500 rpm. in min.
- Torque - 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
- Combined fuel consumption - 7.2 liters
- Fuel consumption on the highway - 5.7 liters
The motor was assembled at the Romanian Automobile Dacia plant, where the French organized the assembly. Until recently, it was from Romania that the engine was imported to the Moscow plant Avtoframos, where it was installed on the first generation Renault Logan and Sandero.
Renault Logan 1.6 engine 8 valves appeared in our country together with the first generation Renault Logan. Initially, the K7M gasoline 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 engine 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 the Logan 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. Torque - 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 service life 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.
Advantages of the K7M Renault Logan 1.6 engine 8 valves
✔ low price and reliability of the 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 motors is provided, equal to 1.83.Cons of the engine K7M Renault Logan 1.6 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 gearbox and clutch form a power unit - a single unit, fixed in the engine compartment on three elastic rubber-metal bearings. The right support is attached to the bracket on the upper 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 crankshaft main bearing supports 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, sockets are made 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 accessory drive pulley. There is a protrusion in the hole of the toothed pulley that fits into the groove on the toe of the crankshaft and fixes the pulley from turning. Similarly, it is fixed on the shaft and the accessory drive pulley.
Renault Logan engine lubrication combined. The main and connecting rod bearings of the crankshaft and the bearings of the camshaft 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 tensioned 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 signs of burning. 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 kilometers.
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 l, only with an increased piston stroke (from 70 to 80.5 mm), of course, the height of the block has increased slightly, the clutch has a larger diameter, the flywheel has increased and the shape of the gearbox housing has 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, changing the oil 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 Renault K7M 1.6 8V engine is used for installation on Renault Logan 1.6 8V (Renault Logan), Renault Sandero 1.6 8V (Renault Sandero), Renault Clio 1.6 8V (Renault Clio), Renault Symbol 1.6 (Renault Symbol).
Peculiarities. The Renault K7M 1.6 engine does not differ structurally from, all the difference is in the volume increased to 1.6 liters. The increase in volume was achieved by increasing the radius of the crankshaft crank (the other dimensions are the same), the piston stroke as a result increased from 70 mm to 80.5 mm. The cylinder block height has increased, but all of its geometric parameters are identical to the K7J. Renault K7M and K7J engines have the same cylinder head and connecting rods. Engine resource - 400 thousand km.
On the basis of the K7M engine, a motor with a 16-valve cylinder head was created. This engine has more advanced characteristics and technologies.
Engine characteristics Renault K7M 1.6 8V Logan, Sandero, Symbol
| Parameter | Meaning |
|---|---|
| Configuration | L |
| Number of cylinders | 4 |
| Volume, l | 1,598 |
| Cylinder diameter, mm | 79,5 |
| Piston stroke, mm | 80,5 |
| Compression ratio | 9,5 |
| Number of valves per cylinder | 2 (1-inlet; 1-outlet) |
| Gas distribution mechanism | SOHC |
| The order of the cylinders | 1-3-4-2 |
| Engine rated power / at engine speed | 61 kW - (83 HP) / 5500 rpm |
| Maximum torque / at engine speed | 128 N m / 3000 rpm |
| Supply system | multipoint fuel injection MPI |
| Recommended minimum octane number of gasoline | 92 |
| Environmental standards | Euro 4 |
| Weight, kg | - |
Design
Four-stroke, four-cylinder petrol with electronic fuel injection and ignition control system, in-line cylinders and pistons rotating one common crankshaft, with one overhead camshaft. The engine has a closed-type forced circulation liquid cooling system. Combined lubrication system: pressure and spray.
Piston
The K7M piston has the same diameter as the K7J, but they are not interchangeable due to the different compression heights.
| Parameter | Meaning |
|---|---|
| Diameter, mm | 79,465 - 79,475 |
| Compression height, mm | 29,25 |
| Weight, g | 440 |
The piston pins are the same as on the K7J. Piston pin diameter 19 mm, piston pin length 62 mm.
Service
Oil change for Renault K7M 1.6 engine. It is necessary to change the oil on Renault Logan, Sandero, Clio, Symbol cars with a Renault K7M 1.6 engine once every 15,000 km or a year of operation. With intensive engine wear conditions (driving in city traffic jams, working in a taxi, etc.), it is advisable to change the oil every 7-8 thousand km.
What kind of oil to pour into the engine: type 5W-40, 5W-30, Renault-approved Elf Excellium 5W40 oil filled from the factory.
How much oil to pour: when replacing with a filter, 3.4 liters of oil are required, without replacing the oil filter - 3.1 liters.
Original engine oil filter: 7700274177 or 8200768913 (both filters are interchangeable).
Replacing the timing belt needed every 60 thousand km. Do not postpone this procedure, if the timing belt breaks, the valve bends. Replacing the timing belt can be combined with adjusting the valves (there are no hydraulic lifters on Renault 1.6 8V).
Air filter must be replaced every 30 thousand kilometers or 2 years of operation. In dusty conditions, it is recommended to replace the air filter more often.
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, however, the updated appearance, financial restrictions, reliability and spaciousness in the cabin did their job. In fact, 473 rubles is a rather big amount and you can buy a BU, as many advised. However, I needed a NEW one !! suspension and unkillable, like that of 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 accommodated only in it. And then, after the spacious Volga, you don't want to get 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 began to sing. 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 then 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 pleasing.
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 note 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 as follows. 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.
