The Most Common Mitsubishi 4B10 1.8 Engine Problems

The 4B10 Mivec engine is an in-line, 4-cylinder gasoline engine with a volume of 1.8 liters. The maximum power of the engine is 139-143 hp, and the torque indicators are 172-178 Nm.

ICE has been produced since 2007. The most popular models on which this engine was installed are the 10th generation Mitsubishi Lancer and Mitsubishi ASX.

All over the world, the name “World Motor” has been assigned to the engine of the 4B10, 4B11 series.

Despite the fact that they are made for installation on Japanese Mitsubishi Lancer cars, their popularity and demand reaches the American continent, but already under the G4KD marking.

Structurally, the engine blocks are cast from solid aluminum, a cast-iron sleeve is pressed inside (4 in total). The basis for production was the Global Engine Manufacturing Alliance (GEMA) platform.

It was successfully created by the joint efforts of the three companies Chrysler, Mitsubishi Motors, Hyundai Motor.

Both series of internal combustion engines contain four valves per cylinder, two camshafts, MIVEC electronic gas distribution system. Control is carried out not only on the intake stroke, but also on the exhaust.

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4B10 1.8 Engine Specifications

Volume (cm3)1798
Power (hp)140-143
Torque170 – 177 Nm
Timing driveChain
Environmental classEuro 4/5
Fuel typeGasoline AI-92
ICE featuresNot
Supply systemInjector
Hydraulic liftersNot
Cylinder blockAluminum R4
Cylinder headAluminum 16v
Cylinder diameter86 mm
Piston stroke77.4
Compression ratio10.5
Phase regulatorMIVEC
Engine oil4.4L 5W-30
Average resource250,000 km

The combustion chamber is of a single-slope type and the central arrangement of candles. The valves are located at a slight inclination in relation to the cylinder head and the chamber cavity, which makes it possible to give it a compact shape.

Inlet and outlet channels are located crosswise. The valve seats are made of a special durable cermet alloy. The same valve guides are used on the intake and exhaust valves. Selection of consumables and repairs now do not take much time.

Inserts and five bearings are installed in the main journals of the crankshaft. Joint No. 3 takes the entire load from the crankshaft.

The cooling system (jacket) of a special design – without an intermediate duct. The coolant does not circulate between the cylinders, only around the perimeter. An oil nozzle is used to systematically lubricate the timing chain.

All pistons (TEIKIN) are cast aluminum alloy. This is to reduce the weight of the structure, but the recesses on the surface of the pistons are increased. The material for the manufacture of connecting rods was forged high-hard steel.

The crankshaft is forged, the design has five bearings (TAIHO) and 8 counterweights. The necks are located at an equal distance from each other at an angle of 180°. The crankshaft pulley is cast iron. On the surface there is a special channel for the V-belt of the drive mechanisms.

4B10 1.8 Engine Advantages And Reliability

This power plant has established itself as a very good, high-quality and reliable engine.

As for the obvious advantages of the 4B10 engine, we highlight the following:

  • Unpretentiousness and simplicity of design.
  • Compact dimensions.
  • Relatively low fuel consumption.
  • The cylinder block and cylinder head are made of aluminum, which made it possible to achieve a minimum weight of the structure, while maintaining reliability and quality indicators.
  • Electronic valve timing and valve lift control system MIVEC. At the same time, control is carried out both on the intake and exhaust cycles.

The average engine life is 300,000 km, and subject to all the basic rules and operating recommendations, as well as timely maintenance of consumables, this figure increases to 500,000 km.

Disadvantages and problems of the 4B10 engine

Although the 4B10 engine is famous for its excellent reliability indicators, this power plant still has some problems.

Consider the most common “diseases” of the engine:

  1. Lack of hydraulic compensators. Valve clearances are adjusted manually by selecting measuring cups.
  2. Feeling of vibration at low speeds after 80 thousand kilometers.
  3. The crankshaft sensor fails prematurely.
  4. Malfunctions in the ignition system.
  5. Burnout of the sealing ring between the manifold and the catalyst.

List of vehicles with pre-installed 4B10 series engines

  • Kia lineup: Cerato, Optima, Sportage;
  • Hyundai: Elantra, ix35, Sonata;
  • Mitsubishi: Lancer 10, Outlander, ASX / RVR;
  • Peugeot;
  • Citroen;
  • Chrysler Sebring;
  • Dodge Avenger Caliber
  • Jeep: Compass, Patriot.

Tuning prospects

There are very few options to increase engine power.

The most popular and effective:

  • Installing a high-quality calibrated firmware.
  • Setting the control unit.


The engine of the 4B1 series, which includes 4B10 and 4B12, are considered one of the most reliable and proven “for years”. It is not for nothing that they are installed on a number of European and American brands.

The average service life of the engine is 300,000 km. Subject to the basic rules and recommendations, the figure exceeds the mark of 500,000 km. Moreover, such facts are not isolated.

It was possible to significantly increase the reliability of the engine after the unsuccessful release of a 1.5-liter engine. Perhaps, if not for the “one and a half”, the fate of the 4B10 and 4B12 series engines is unknown.

The following changes have been made: intake receiver, DMRV, connecting rod mechanism, gas distribution system, phase shifters, a new type of firmware has been installed in the electronic engine control.

Models that go on sale in the CIS countries are specially “strangled” in terms of power to around 150 hp. This is explained by the amount of tax payments in excess of the limit.

One more feature. Despite the consumption of AI-95 fuel, the engine copes well with AI-92. True, after the first or next 100,000 km, a knock begins, valve adjustment is needed, since there are no hydraulic lifters.

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