Applicability on cars
Budget models of Renault cars Logan 1.4 and Logan 1.6 over a nearly ten-year history of presence on Russian roads managed to conquer recognition of many thousands of motorists. The concept of the French manufacturer, who resolved in 1998 to create an inexpensive and practical passenger car, intended for emerging markets, received the most triumphant continuation and unexpected development. If in 2005 it all started at the small platform of the Autoframos enterprise in Moscow with a "screwdriver" assembly of several thousand cars per month, then today the Volga car plant builds his annual plans, relying on the whole "Loganovskaya" model paint: Renault Logan, Renault Sandero, Lada Largus. Sales of these three models in the country in 2014 exceeded 160 thousand pieces.
In a large extent, this popularity of these models of Renault ensured the use of proven and well-proven in other machines of the concern of the concern and well-established engines of internal combustion of the K7J 1.4 L and K7M 1.6 l series of internal combustion engines. The flagship line for Renault Logan is considered to be the 16V four-cylinder liquid cooling unit with the K4M index, the production of which, in addition to the Renault Espana parent company, also mastered the production sites of AvtoVAZ. These 16-dipal motors with decent technical characteristics still equip other Renault models (Sandero, Duster, Kangoo, Megane, Fluence), as well as Lada Largus and Nissan Almera G11.
Features of the design and DVS specification
Engine design K7J (manufacturer Automobile Dacia, Romania) 1.4 l / 75 hp It is inherited from the rather old Motors of the Renault 1980s corporation (EXJ series) and therefore looks somewhat archaic: here and the unusual chain drive of the oil pump used on units with the lower arrangement of the camshafts, and the ancient rims of timidation. The remaining engine solutions 1.4 are standard and no different from other four-stroke 4-cylinder single SOHC Type Motors: Round vertical cylinder location, 2 valves per cylinder, drive Timing from a toothed belt, Liquid cooling and combined lubricant system (for the most loaded DVS parts. Lubricant Under pressure, to all other things - simple splashing). K7J is more than 400 thousand km of mileage. Motor 1.4 provides a car the following dynamics: the maximum speed is 162 km / h, the hundred is dialing in 13 seconds.
Engine Renault Logan K7M 710 and its successor K7M 800 (production All the same Automobile Dacia) 1.6 l and 86 hp (K7M 800 - 82 hp) according to the design almost completely coincide with K7J, also have liquid cooling, but they have an increased piston increased by 10.5 mm, obtained by changing the height of the block. Other clutch and flywheel (larger diameter) are also used, and the gearbox crankcase has minor modified changes. The K7M resource also exceeds 400 thousand km in running. Dynamic motor characteristics: speed at a maximum of 172 km / h, 100 km / h - for 11.9 seconds, unlike 1.4.
The greatest differences in the design and characteristics are observed at the engine K4M, despite the fact that this internal engine is 1.6 liters and 102 hp It is also the next development of the K7M series. Absolutely new 16-valve cylinder head with two lightweight camshafts and a new piston system. Here, finally, it is eliminated by the need for constant adjustment of the DVS valves through sufficiently short runs, is eliminated by the simple use of well-known hydrocomathers. Motor speeds up cars up to 100 km / h in 10.5 seconds, reaching a maximum of 180 km - quite good characteristics. There are no frank weak points in this unit: the necessary changes are made to the system in terms of pumps and thermostat, the ignition module was completed.
Advantages and disadvantages of power units
Significant experience of operating car Reno with all three types of liquid cooling engines allows you to make a rather objective picture of their strengths and weaknesses, and two models of K7J and K7M are almost identical to these characteristics, and only the K4M engine has significant differences due to more modern technological solutions, And what better, solve already buyers.
Advantages of K7J and K7M:
- low cost and simplicity of engines;
- reliability: confirmed motor resource is more than 400 thousand km;
- versatility and maintainability;
- simplicity of maintenance;
- high torque;
- good "elasticity" of engines, equal to 1.83.
Disadvantages of K7J and K7M:
- relatively high fuel consumption;
- the instability of revolutions when working at idle;
- the absence in the design of hydrocomathers, as a result, the need for constant valve adjustments (after 20-30 thousand km);
- "Bend" valves with a sudden breakdown of the timing belt;
- increased "fluidity" crankshaft salts;
- weak reliability of the elements of the cooling system;
- noise and tendency to vibrations.
The advantages of the K7M model in front of the K7J can only be attributed to a 12% maximum power and at a 11% maximum torque. But for these advantages of KHS 1.6 l pays and increased by 4.5% appetite, so what is better, the question is controversial.
Advantages of K4M:
- reliability, practical resource exceeds 400 thousand kilometers;
- 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, K4M 16V works much quieter, not prone to vibrations and has the same resource, but significantly high power and torque.
Motor disadvantages K4M:
- expensive spare parts;
- "Bend" valves during belt breakdown;
- the weak "elasticity" of the engine equal to 1.53, as a result, problems with the acceleration of the car during overtakers.
Thus, a detailed analysis of the technical characteristics of all three DVS samples, as well as the practical experience of operating Renault Logan with these power plants makes it possible to determine which motor is better. The more powerful ICC 1.6 l with liquid cooling is still somewhat preferable to its "older brother" 1.4 liters. Power 75 hp It is simply not enough for a comfortable control of a loaded car either on a country track, nor in short "mining" in the city. And in the 16V dispute with 8V, the first sample acts as an unconditional leader. The only characteristic on which 16V loses to its opponent - "Elasticity". For the rest of the characteristics 16V is better better. The engine V16 with liquid cooling of the Renault corporation is simply much more modern and gives more opportunities to the driver.
The engine does not tolerate the 92nd gasoline. Oil service dealer recommends spending every 15 thousand km. It includes almost 5 liters of oil 5W-40 or 5W-30. The air filter and candles usually serve two times longer. Replacing the timing belt with rollers is produced every 60 thousand km, the generator belt usually change with it, water pump runs 2 - 3 replacements.
Unlike a similar 8-valve motor, a sixteenthly gauge is much quieter, more economical and does not cause inconvenience with strong vibrations. However, the drivers note its imperfect elasticity, at high speeds of thrust for confident overtaking still lack.
Owners upsets the high cost of spare parts and their meager range in stores, compared to older models, as well as the lack of protection: when the timing belt breaks, the valve always bends about the pistons.
His resource Motorists estimate approximately 400 thousand mileage kilometers.
In the Renault Logan car model range, available for buyers versions with different options for equipping cabin, motors and gearboxes. This allows you to choose the most optimal car for a complete set of a specific future owner, given his wishes and ambitions.
The most top-end option among Renault Logan modifications is a version with a 1.6-liter 16-valve motor, 1.6 Specifications are excellent. Next, the capabilities and technical characteristics of 1.6 motor and the car as a whole in such equipment will be considered.
Mass and overall parameters
Despite the fact that the car is positioned, as a reliable and unpretentious family "assistant", it still requires timely and qualitative regulatory maintenance, the fulfillment of the conditions of which will allow the owner more than one year to rejoice in the sibling daily operation of his "friend", has an engine 8 or 16 valves.
Although the Renault Logan model is compact and is not intended for the carriage of large loads, the developers managed to endow its fairly spacious luggage compartment and a very comfortable cabin, in which five passengers will be comfortable.
Among the main dimensions are the length of the car, because it depends on it the capacity of the trunk and the space in the cabin. According to official technical data, this envelope is 4346 mm. No less important parameter, positively affecting the stock of free space in the cabin, is the width of the model, which for Renault Logan is characterized by a mark of 1732 mm (along the edges of the mirrors). The height of the model is 1517 mm. Such important for operation in the conditions of domestic roads The parameter as a road clearance has a very impressive value - 155 mm. This allows the car to cope with light off-road and country rut.
The mass of the Renault Logan model according to the manufacturer's statements excluding passengers and in the absence of cargo in the trunk is 1127 kg. With the maximum possible (regulated) loading, this parameter reaches a mark of 1545 kg. Recall that the volume of the luggage compartment is quite solid and the 510 liters of the stock of free space can boast, but such technical characteristics 1.6 has cars.
Motors and dynamic capabilities
For the 16-valve 1.6-liter version proposed on the market, the 16-liter version is not the only option in terms of equipment. The entire motor range of these cars has similar data and is able to please the owner of the economy due to small working volumes of combustion chambers.
All three versions of motors are characterized by their transverse location under the hood. They are atmospheric units with 4 cylinders. All engines do not have turbocharging. The main constructive difference is the different number of valves in the block head - engine 8 or 16 valves.
What are the technical characteristics of 1.6 version? All units are equipped with a distributed fuel injection, which helps to increase dynamic capabilities. The regulated fuel type for them is the gasoline of the AI-92 brand. Also, as an alternative, the manufacturer provided the possibility of operation of motors on gasoline AI-95.
Technical characteristics of 1.6 motor with a 16-valve gas distribution mechanism. Power is available 102 liters. with., which is achieved when the crankshaft turnover of 5750 rpm. Maximum torque for this version of the motor is available at 3750 rpm and is 145 nm.
With such traction characteristics, the car can accelerate until the first hundred for 10.5 seconds. The value of the maximum speed is impressive 180 km / h.
A mansion is positioned by such operational parameter as fuel consumption. According to the official technical data, the 16-valve version of Renault Logan is able to consume no more than 9.4 liters in the urban cycle per 100 km of the path, even taking into account the dynamic ride. For a mixed cycle, the value of fuel consumption is reduced to a mark at 7.1 liters, and with rustic movement - is at all 5.8 liters.
Let's sum up
Based on the above aspects, once again you can make sure that due to its balanced technical and consumer characteristics, the Renault Logan model is one of the most reliable, unpretentious, economical and practical cars available on the expressions of the domestic market.
Such features allowed the sedan to achieve enviable popularity in the numerous army of car fans and continue to gain a reputation that is strengthened from year to year.
Renault Logan, he is also Nissan Aprio, Renault Tandar 90, Nissan NP200, Lada Largus and Renault Symbol - Cars of one group, built on the basis of the Romanian model Dacia Logan. The car was born in 2004 and completed throughout its production life with various power units.
Motor Renault Logan, which is used to configure the car mainly determined by the solvency of the market, to which the car is supplied, as well as the requirements for the quality of fuel poured.
Renault Logan Series Petrol Engine, installed on Russian-made cars is a modified design of a strongly obsolete motor, which was mounted on serial cars from the mid-80s. The K7M engine, in contrast to its progenitor series E, has the upper arrangement of the camshaft, which moves 8 valves.
Such a revision of the Renault Logan engine was brought to a more modern level, in contrast to the previous generation, when the valve control shaft was located at the bottom of the cylinder block. 8 The valve internal engine Logan has several versions, but the technical characteristics of the Logan motor are far from perfect.
Renault Logan 1.6 engine in its present execution can develop the maximum power of 98 hp. The K7M engine is quite universal on environmental characteristics, and although currently issued on Euro 5 standards, having higher technical specifications, also produced throughout the spectrum of requirements from Euro 1 to Euro 4.
Power unit Renault Logan 1.6 8 valves has limited improvements. In order for the engine characteristics to meet the requirements and ecology, and in power, and the fuel consumption was completed, the cylinder head was completed and two camshafts were installed. Such an engine received the K4M constructive index. The technical characteristics of this motor indicate the possibility of capacity development of 113 hp at 5500 rpm.
Engine K7M.
Engine Logan K7M has 12 (14) versions. Differences are expressed in maximum power, and an option for fuel used. The maximum power varies from 74 to 98 hp, with maximum turns ranging from 5,000 to 5500. Gasoline, gas, ethanol can be used as fuel.
Structurally engine 1.6 is made according to the L4 SOHC scheme. Number of valves - 8. Injector fuel supply system with electronically controlled.
There are no cars on the Russian market, the engines of which are configured to work on liquefied gas or ethanol. Until 2010, the K7M engine 710 was serially installed on Renault Logan. In 2011, the K7M 800 series engines began to install the automobiles. The technical characteristics of the new line of motors are somewhat invented in favor of Euro4 requirements.
Due to the reconfiguration of the injection system and the operation of the catalytic converter, the engines lost 3 hp And now only 83 horses are developing at 5250 rpm, while developing a torque of 130-135 nm within speeds from 2500 to 5500. The peak torque value is achieved at 4700-4800 rpm.
As an embodiment and as a spare part comes the K7MF710 motor, which has an alpuning index F. Indicates the ability to work and on gasoline and on ethanol. Officially, such engines were not installed on cars intended for the Russian market.
The design of the valve management is based on the use of rocker pushers, which increases the number of parts used and, accordingly, reduces the reliability of this node. The intake and outlet valves are located on both sides relative to the axis of the engine. The camshaft drive is carried out by belt transmission from the crankshaft. The ratio of rotation frequency is 1 to 2.
When the valve belt breaks can bend. The CPG description indicates the presence of a single outlet in the piston's bottom, but its depths are not enough. The valve can be brought when the valve hangs in the fully open state.
With timely passing, the replacement of the necessary design elements of the engine resource is 400,000 km of mileage until the first overhaul.
Engine K4M.
16 valve engines are installed on Renault Logan. From the factory, cars are equipped with C4M power units. This type of engine is a continuation of the development of the K7 family. The main constructive difference is the engine performance according to the DOHC scheme. Two camshafts installed in the modified valve head are used.
The scheme is traditional, and the constructive solution made it possible to avoid the use of the rocker as pushers. The force is transmitted directly from the camshaft camshaft to the valve stem. Engine specifications allow to obtain 113-115 hp, but a feature of this variant of the power plant is the presence of a pronounced peak torque value.
The dependence of torque from revolutions is practically linear with an increase of up to 160 nm by 4500 rpm and the subsequent decrease of up to 135 nm by 7000 rpm. The engine is quite turning. The maximum power is removed at 6800 rpm.
On the Russian version of the Renault Logan engine K4M comes with an index 490. The same type of power installation is mounted in Lada Largus. To answer the question of whether the valve is oppressed on this type of engines, it is necessary to refer to the design, on the basis of which this engine was designed.
The resource of the C4M power plant is 400,000 km, as well as its predecessor. The indicators are confirmed by the manufacturer laid and under conditions of real exploitation.
Fuel system
The fuel system of both types of aggregates is an injection. Engine engines are designed for 95 gasoline. The use of fuel with octane number 92 is permissible, but not justified, since the fuel consumption increases and the power characteristic of the engine is reduced.
Oil system
Constructively completed the same. The system pressure is created by the gear oil pump installed at the bottom of the engine. Oil fence is made from the crankcase and under pressure is supplied to the system. The lubricant of the cylinder mirrors is carried out by oil fog (bubble), which is created when the crankshaft rotation is rotated. Forced irrigation of the lower part of the cylinders with the help of oil nozzles is not provided.
Engine oil for Renault Logan is selected based on the operating conditions. What oil is used on a base basis absolutely not fundamentally. Since the power units are designed on the basis of engines of the 80s, then all structural materials and in general, the entire reliability of the engine involves the use of mineral, and semi-synthetic and fully synthetic oils.
However, the manufacturer indicates the use of mainly mineral and semi-synthetic, as the economically most justified variants of liquid lubrication. Engines are not so picky to work exclusively on modern synthetic oils. The first time at the factory is flooded by the All-season semi-synthetic oil ELF 5W30.
What oil pour, then during operation depends on the technical condition and mileage of the engine, as well as temperature conditions of operation. The most versatile oil for Renault Logan is a lubricant with a viscosity of 5W40 and 5W50, which ensures normal operation of the motor in all climatic zones.
Major malfunctions and operation problems
Some malfunctions, such as engine trimming or its vibration, have their own fundamental cause of spark plug. Candles have a limited resource and require timely replacement.
Due to the fact that this ignition system consumable control is often formed and in principle has a limited amount of high-quality suppliers, then the candles should either change when passing in certified stations, or acquire candles from authorized dealers.
Another frequent malfunction is the outflow of the cylinder head head. The problem is associated with insufficient cooling of the block head. This is especially manifested by 16 valve engines.
The breakdown of the timing belt leads to the flap of the valves. Therefore, it is required to replace the belt drive and rollers every 60,000 km of run.
The design of the power units is not complicated. Engine repair If you have enough skills, you can make it yourself. When replacing the timing belt on the 16 valve unit, it should be borne in mind that there are no marks for setting shafts on the front of the motor.
If the upper dead point of the piston can be determined by turning the candles and turning the crankshaft, followed by fixing it with a bolt through the specialist, then the camshafts are set by marks available in the rear of the head and closed plugs. Shafts also have the ability to fix special inserts.
Tuning and improvement capabilities
Renault has its own tuning DVS K4M RS, which develops 133 hp In Renault Logan, this engine is not installed at the factory. If there is no replacement of camshafts or deep upgrading the cylinder head, the engine tuning is usually performed by flashing the engine control system. This allows you to raise the power of the standard 16 valve engine from 109 to 120 hp
The installation of a turbine supercharger is possible, but will lead to a decrease in the engine resource.
Renault Logan 1.6 8 8 valves appeared in our country with the first generation Renault Logan. Initially, the gasoline power unit K7M issued 87 horsepower, but today the same motor has a capacity of 82 hp. There are no errors in this difference. The fact is that in 2005 the motor corresponded to the ecological standards of Euro-2, and today corresponds to the norm of Euro-5. The power unit was more environmentally friendly, but the reconfiguration was deprived of the Logan engine of several horsepower.
Technical characteristics of Renault Logan 1.6 8 8 valves
Working volume - 1598 cm3 Number of cylinders - 4 Number of valves - 8 cylinder diameter - 79,5 mm Piston stroke - 80.5 mm Drum drive - belt Power hp (kW) - 87 (64) at 5,500 am. in min. Torque - 128 nm at 3000 vol. in min. Maximum speed - 175 km / h acceleration until the first hundred - 11.5 seconds Fuel type - gasoline AI-92 Fuel consumption in the city - 10 liters Fuel consumption in a mixed cycle - 7.3 liters Fuel consumption on the highway - 5.8 liters Engine has a large resource and completely unpretentious . The main thing on time to change the timing belt, which is perhaps the main weak place of the engine.
Pluses of the engine K7M Renault Logan 1.6 8 valves
✔ Low price and reliability of engines design; ✔ Reliability: a confirmed motor is more than 400 thousand km; ✔ Universal and maintainable; ✔ simple maintenance; ✔ have a high torque; ✔ It provides good "elasticity" of engines, equal to 1.83.Minuses of the engine K7M Renault Logan 1.6 8 valves
✔ relatively high fuel consumption; ✔ There is instability of revolutions when working at idle; ✔ In the design there are no hydraulic components, so it is necessary to constantly adjust the valve (after 20-30 thousand km); ✔ There is a probability of valve bending with a sudden breakdown of the timing belt; ✔ The crankshaft seals often flow; ✔ Low reliability of the cooling system; ✔ Very noisy and prone to vibrations.If all regulatory work is carried out in a timely manner and according to the manufacturer's recommendations, the engine resource can reach 400 thousand km, which is confirmed by real numerous examples. The only unpleasant surprise may be the breakdown of the timing belt, evidenced by reviews. In the case of such an accident, pistons face valves, causing their bend or complete destruction.
Engine Renault Logan 1.6 8 CL. Petrol, four-stroke, four-cylinder, row, eight-flaped, with the upper arrangement of the camshaft. The order of the cylinders: 1-3-4-2, the countdown - from the flywheel. Supply system - distributed fuel injection MPI. The engine with a gearbox and clutch form a power unit - a single unit fixed in the engine compartment on three elastic rubber-metal supports. The right support is fastened to the bracket on the top cover of the drive belt of the gas distribution mechanism, and the left and rear - to the card of the gearbox. The engine cylinder block is cast from cast iron, cylinders are boring directly in the block. The nominal cylinder diameter is 79.5 mm. In the lower part of the cylinder block, there are five crankshaft root bearing supports with removable lids, which are attached to the block with special bolts. The holes in the cylinder block under the bearings are processed when the covers are installed, so the covers are not interchangeable and for differences are marked on the outer surface (the lids account is conducted from the flywheel side). On the end surfaces of the middle support, nests are made for a stubborn semi-colts that prevent the axial movement of the crankshaft. Inserts The root and connecting rod bearings of the crankshaft steel, thin-walled with antifriction coating applied to work surfaces. Crankshaft with five root and four rod cakes. The shaft is equipped with four counterweights, cast at the same time with him. To supply the oil from the root neck, the channels, the outlet holes of which are closed with plugs are served. At the front end (sock) of the crankshaft set: an asterisk of an oil pump drive, gear pump pulley of the gas distribution mechanism (timing) and pulley of the drive of auxiliary aggregates. In the hole of the gear pulley there is a protrusion that enters the pier on the sock of the crankshaft and fixes the pulley from turning. Similarly, fixed on the shaft and pulley of the drive of the auxiliary units.
Renault Logan Motor Lubrication Combined. Under the pressure, the root and connecting rod crankshaft bearings and the camshaft bearings are lubricated. Other engine nodes are greased by splashing. The pressure in the lubrication system is created by a gear oil pump located in front of the crankcase pallet and attached to the cylinder block. The oil pump is driven by a chain transmission from the crankshaft.
The timing of timber on Renault Logan 1.6 8 valves is carried out according to the following scheme (the image is slightly higher) - the torque of the crankshaft pulley is transmitted to the pulley of the camshaft rotating the plot of the coolant pump. The belt is stretched by a special roller, which changes with the timing belt. In the event of a belt break of the valve. Therefore, in accordance with the regulation of the car maintenance of the car, conduct a belt state check every 15 thousand km of mileage. The surface of the toothed part of the belt should not have folds, cracks, fermented feeds and tipping tissue from rubber. The reverse side of the belt should not have wear, exposing the filament of the Cord, and the markup traces. On the end surfaces of the belt should not be observed with bundles and grinding. The belt must be replaced when traces of oil detecting on it. Regardless of the state of the timing belt Renault Logan, it must be replaced every 60 thousand km of mileage.
Malfunctions and repair of the engine Renault Logan / Sandero 1.6 K7M
RENAULT LOGAN K7M 710 engine 1.6 liters. 86 hp Not other than the usual K7J 1.4 liter, only with an increased piston running (from 70 to 80.5 mm), by itself the height of the block slightly increased, the adhesion of the larger diameter, the flywheel increased and the shape of the CATER CTP has changed. Structurally engine Logan 1.6 liters, as well as his low-volume fellow, has all the same archaic design of the middle of the last century with a rocker and a strange oil pump drive from the lower reno of motors of the 60s. In spite of everything, with a careful attitude to the motor, service and maintenance, replacing the oil 2 times more often than according to the instructions, it is very and very reliable, according to the internal data of the engine of Logan 1.6 about 400 thousand km, in practice the engine drove a little more . In 2010, the K7M 710 was replaced at the K7M 800, the motor was invented, pulled into the ecological norm of Euro-4, the capacity decreased to 83 hp, there was no constructive change. The minuses at K7M are the same as the engine K7J 1.4, high fuel consumption, often at idle begin to float the turnover, constantly (once in 20-30 thousand km) need to be adjusted valve, hydrocompensators as it was not so and no, the thrift The belt, when the belt is climbing, Logan 1.6 is a valve oppression, so once in 60 thousand km change the belt. All the same leaks of the crankshaft. Motor noisy, there are vibrations. On the device of the engine Renault Logan 1.6 and where the engine number is located, the information is set out in the article "Motor K7J", which, except for the volume and related changes, does not have other changes. There are also described all the malfunctions and the causes of their occurrence. Speaking about what engine on Renault Logan is better than 1.4 or 1.6 8 valves, take 1.6 ... The engine is the same, but a slightly disconnector is completely weak. Also, on the basis of K7M, the K4M engine with 16 valve GBC and other significant innovations was created, the power of such a motor is significantly higher and in the case of a choice (for example Logan, Sandero), always take it, you will not regret.Engine tuning Renault Logan K7M 1.6
Chip Tuning Engine Renault Logan Logan K7M 800 engine can be removed by the catalyst, return its initial power of 86 hp, put the exhaust and flash the sport with firmware, maybe a couple of horses and add, but nothing will change significantly, except for fuel consumption, now your motor will eat more.Renault Logan 1.6 8 8 Valves Repair (video)
