Renault/Dacia Logan 1.4 engine specs
- Manufacture – Bursa plant
- Mark\Type of engine Renault/Dacia Logan – K7J
- Years of production – (2004 – present time)
- Cylinder block material – cast iron
- Power system – injector
- Type – in-line
- Number of cylinders – 4
- Valves per cylinder – 2
- Piston stroke – 70 mm
- Cylinder diameter – 79,5 mm
- Compression ratio – 9.5
- Logan engine capacity – 1390 cc
- Renault Logan engine power – 75 hp /5500 rpm
- Torque – 112Nm/3000 rpm
- Fuel – 92
- Environmental norms – Euro 3
- Fuel consumption – city 9,4 l. | highway 5,5 l. | mixed 6,9 l/100 km
- Oil consumption – up to 0,5 l/1000 km
- Oil in the engine logan 1.4: 5W-40, 5W-30
- Oil change is carried out once every 7500 km (In city conditions): Once every 15,000 km(In paradise conditions)
Renault Logan Resource:
- Factory data – 400 thousand (unofficially, factory tests)
- In practice – 400+ thousand kilometers
The engine was installed on:
- Renault Logan
- Renault Sandero
Renault Logan 1.4 engine faults and repair
The Renault/Dacia Logan K7J 710 1.4 liter engine. 75 hp is an evolution of the old ExJ motors of the development of the 80s. Structurally, the engine of Dacia Logan has a strange and rather archaic design, it still uses the timing chain and a strange system of drive oil pump inherited engine K7J 710 from the lower-shaft forebears of the 60s. In spite of it, at correct running-in (to spin not higher than 3-3,5 thousand/rev, speed not higher than 130 km/h, during the first 1000 km), timely service, the motor is very reliable, motor resource of Logan in factory tests made more than 400 thousand km, and how much goes in practice? There are copies with an even higher mileage, the resource is at a high level! Popularity of cars with this engine at cab drivers is an extra confirmation of it.
To the minuses of the K7J engine can be attributed high fuel consumption. Often the idle speed starts to float. On the engine Renault Logan 1.4 there are no hydrocompensators, so every 20-30 thousand km you need to adjust the valves. The drive of the timing belt, with a break in the belt Logan bends valves, to protect yourself from this, once in 60 thousand km you need to change the belt. In addition, often leaks crankshaft oil seal, the motor itself is noisy and on the highway does not go anywhere at all. There is a more powerful and voluminous version of this motor – K7M, when choosing a car with these motors, pay attention to K7M.
Disadvantages of the engine Renault/Dacia Logan
Let’s start not quite with the disadvantage, but the question that worries the public: warming up the engine and whether it is necessary to warm it up? The manual says, sat down and drove, in practice, the oil becomes more viscous and worse supplied to the rubbing pairs, it is not superfluous to give the engine a minute to work to even idle.
- Let’s go directly to the malfunctions, often owners are faced with unstable operation of the engine reno logan or it completely stalls, the problem is most likely in the RHX (Idle Speed Regulator), perhaps clogged filter mesh gasoline pump or came fuel filter, may be DPKV (Crankshaft Position Sensor) or ignition coil. If it stalls on the run, while the engine is fully warmed up, look for air plugs in the cooling system.
- The next malfunction is overheating of the Logan engine or vice versa, does not warm up. The problem is in the thermostat, most often. In the case of overheating to the causes can be added a faulty water pump or a clog in the channels of the cooling system or radiator. You may have overloaded the engine, combustion chamber fouling or high compression.
- The third type of malfunction: knocking and noise in the engine Renault Logan, what is the cause? The cause may be valves that require adjustment of clearances, there is a clear metallic sound, the cause is solved by visiting the service and adjusting the valves. Knocking can be main and connecting rod bearings, pistons and piston pins. In all cases, you need to take the car to the service and solve the problem as soon as possible, otherwise the consequences will hit the pocket.
- Feeling the vibration of the engine Renault Logan ? Most often the cause is the wear of the engine cushion, in addition, the reasons include the imbalance of the crankshaft, different compression in the cylinders or weakened fixing the crankshaft pulley.
Well and a popular problem, your engine Logan troit, what to do, what to sin, who to blame … The reasons are simple, banal poured bad gasoline or ignition coil, no? Look high voltage wires, plugs, gasoline pump.
Renault Logan engine number 1.4 / 1.6 (K7J/K7M)
The number is placed next to the oil pressure sensor, on the rear of the cylinder block, on the left side.
Renault/Dacia 1.4 K7J 710 engine tuning
Engine K7J was originally developed using outdated technologies with the aim of resource, reliability and sporting component was not considered in principle. Besides, after finalization of the engine the main trump card – reliability – is lost. Thus any dynamics is not acquired, similar VAZ will be faster… the sense of tuning is absent. For the stubborn let’s continue… let’s consider several variants of tuning of this motor:
Chip tuning, Renault/Dacia 1.4 engine flashing
Tuning offices offer firmware with an increase in power by as much as 7-9 hp. Naturally, the firmware atmospheric motor, will not give anything and the whole increase will remain at the level of self-indulgence, but the fuel consumption will increase.
There is an opinion that if you remove the catalytic converter on the Logan and flash, the car will fly, but waste your time, there is no use, the car does not go.
Compressor on Renault/Dacia 1.4
The easiest, fastest and most reliable way to install the compressor is to buy a ready-made kit. For logan motor kits are not so much in nature, but still there are offices ready to sell a ready set, one of the most famous such offices, it is popular (among tazovodov) St. Petersburg company Auto Turbo, they can order a set based on PK-23-1 with a pressure of 0.5 bar, the standard motor will stand without modifications to the piston and will inflate in the neighborhood of 90-100 forces. More productive PK-23s with 0.7 bar pressure will ask for compression ratio reduction, we will reduce it by installing a thick cylinder-head gasket or two gaskets, possibly require modification/replacement of the piston. Both compressors will require more productive Volgov injectors BOSCH 107, exhaust modification and online tuning. If you have a budget of 1/4 of the cost of the car, you can build a compressor on the basis of Toyota SC14 from Mark, but the list of additional parts will stretch to several pages. Anyway, you will not get any super power.
Will the compressor reduce the resource of the K7J engine? Of course it will, but tuners don’t care much)))
Turbine on Renault Logan 1.4
We do the same as with the compressor, injectors BOSH 107, gasket cylinder head, intercooler (from Evolution for example), exhaust on 51 mm pipe, pipes, consumables, the turbine itself IHI RHB3 or similar. Now this pile of iron need to adjust, for this you need to befriend the motor with ECU January, it will not be easy, but realizable quite. At the output of this set will give +\- 100 hp.
Purchase and installation of 1.6 liters. 16V
Ideal tuning of 1.4 liter engine, buy a good, driving initially motor K4M and make a swap. Avoid fiddling with supercharging, loss of resource and regular repairs)
ENGINE RATING: 3+