2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42
The K7M engine is a power unit manufactured by Renault, designed for installation in passenger cars. After the acquisition by Renault of the domestic AvtoVAZ, engines began to be installed on many vehicles of the Russian manufacturer.
Specifications
Renault with the K7M engine is a continuation of the K7 powertrain line. This motor became a follower of the K7J. Rocker arms were added to the power unit and the piston stroke was increased by 10.5 mm (from 70 to 80.5). In connection with the changes, the block has become taller, and some design features have changed. Thus, the clutch became larger in diameter, which contributed to the increase in the flywheel.
From 2004 to 2010, the K7M engine was produced with model number 710, and after 2010 it was already produced with an index of 800. Unlike the first, the second power unit was slightly strangled and the environmental standard was raised to Euro-4. The resource of both motors is designed for 400,000 km, but, as practice shows, a major overhaul occurs after no more than 350,000.
The disadvantages of the motor include high fuel consumption andlack of hydraulic lifters. There is a timing belt drive, which increases the risk of a break to get bent valves and overhaul of the block head.
K7M engine specifications are shown below.
| Description | Characteristic |
| Brand | K7M |
| Volume | 1598 cc |
| Injection type | Injector |
| Power | 83-86 l. s. |
| Fuel | Petrol |
| Timing | 8-valve |
| Cylinders | 4 |
| Fuel consumption | 7, 2 liters |
| Piston diameter | 79, 5 mm |
| Environmental Norm | Euro 3-4 |
| Resource | 350+ thousand km |
Renault with a 1.6-liter K7M engine has become quite widespread. The engine is installed by Renault Logan and Sandero, as well as the domestic Lada Largus. Based on the power unit, a 16-valve K4M was developed. All engines are equipped with a 5-speed manual transmission.
Maintenance
Recommended interservicethe interval is 15,000 km. To increase the life of the motor, it is recommended to reduce it to 10,000 km. During scheduled maintenance, the oil filter and engine oil are changed.
Compositions for filling into the K7M engine are ELF Evolution SXR 5W40 or ELF Evolution SXR 5W30 lubricating fluid. It is recommended to install the original oil filter, it has a catalog number - 7700274177. The sellers may have the following designation: 7700274177FCR210134. Also fits another oil filter with article number 8200768913.
Along with the oil change, a whole range of diagnostic work is carried out:
- Checking the fuel system, which includes diagnostics of pressure and injectors.
- Spark plug condition.
- Checking high voltage wires.
- Replacing the air filter.
The process for changing the oil and oil filter is as follows:
- Dismantle the lower metal motor protection.
- Unscrew the drain plug with a key to "19".
- Pre-substituting the container, we wait until the oil drains.
- We twist the drain plug, changing the seal. It is recommended to install a copper o-ring.
- Unscrew the oil filter using a special puller. We install a new filter element by changing the sealing ring.
- Pour new engine oil through the oil filler neck.
- Warm up the engine. If necessary, add the liquid level so that the markon the dipstick was between MIN-MAX.
Faults and repairs
Like all Renault engines, the K7M has problems and typical faults:
- Failure of sensors: IAC, DKPV, DMRV. You can fix the problem by replacing the elements.
- Vibration caused by right pad wear.
- Overheating. Usually it's the thermostat or the water pump.
- Troit the K7M engine. In this case, the malfunction should be sought in the elements of the air-fuel mixture formation process.
- Knock. A loud metallic noise in the engine compartment means it's time to adjust the valves.
Tuning
Motor tuning is divided into two parts: chip tuning and compressor installation. In order to increase the power characteristics, it is necessary to flash the electronic control unit (ECU) with sports firmware. But before you do that, you will have to redo the exhaust system and remove the catalyst.
The second option to increase power is to install a compressor. Factory compressors are not produced for Logan, but you can purchase a universal kit that is suitable for the K7M motor. The most suitable option from the St. Petersburg company "Auto Turbo". The kit was developed on the basis of PK-23-1 with a working pressure of 0.5 bar. You will also need to install nozzles from the Volga manufactured by Bosch 107. But do not forget that installing a compressor reduces the life of the motor by 20-25%.
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