Mitsubishi 4G63 2.0L Best Specs, Problems & Reliability

The 4G63 engine is one of the most popular four-cylinder in-line engines, which was designed by the specialists of the Japanese company Mitsubishi. This power unit has about a dozen different modifications that have been installed on many Mitsubishi models.

Mitsubishi 4G63 2.0 Engine Review Specs Problems Reliability

The first 4G63 modification appeared back in 1981, and continues to be produced to this day with minor changes. The excellent technical characteristics of this engine are combined with its excellent reliability. The engines of the 4G63 family are four-cylinder power units that have a volume of 2.0 liters and power from 109 to 144 horsepower.

The 4G63 engine has a cast iron cylinder block and an aluminum head for maximum overheating resistance. Depending on its modification, this engine was equipped with DOHC and SOHC gas distribution systems with two or one camshaft.

This engine was originally equipped with two valves per cylinder. In the 1990 revision, a modification with 16 valves appeared, which made it possible to obtain the maximum possible power from a two-liter engine.

4G63 Modifications

  • In the mid-eighties, simultaneously with the main engine, the 4G63T modification appeared, which had a turbocharging system and a 12-valve system. This engine was distinguished by increased power, however, due to the imperfection of the used 4G63T turbine, it did not receive proper distribution. The only exceptions were sports versions, on which the turbo engine produced about 300 horsepower and provided the cars with enviable dynamic performance.
  • In 1986, the 4G63T modification, which also had the name Sirius, was replaced by the 4G63. This line of engines used the DOHC gas distribution system, which in turn allowed to improve power performance. The 4G63 engine met the stringent Japanese environmental regulations.
  • Soon, modifications appeared with four valves per cylinder and an upgraded SOHC gas distribution system. This version of the engine provided excellent dynamics and at the same time had low fuel consumption.
  • In 1993, an updated modification of the 4G63 engine appeared, which was equipped with a flywheel attached to seven bolts. The intake system was changed, and an injection fuel system appeared. The 4G64 engine with minor changes, but already under a new index, is being produced up to the present day.

Some Chinese manufacturers still use this engine in their cars today, and buyers appreciate this engine for its excellent reliability and maintainability.

4G63 2.0 Specs

Years of release1981 - today
Engine weight160kg
Supply systemCarburetor / Injector
Cylinder block materialCast iron
Power109 hp at 5500 rpm
Number of cylinders4
Number of valves per cylinder2
Cylinder diameter85 mm
Piston stroke88 mm
Compression ratio9
Torque159 Nm / 4500 rpm
Environmental standardsEURO 4
Fuel consumption13.9 l / 100 km combined
Oil type0W-40
How much oil is in the engine4.0
When replacing the casting3.5 liters
Oil change is carried out10,000 km

4G63 engine are installed on:

  • Mitsubishi Eclipse
  • Galant
  • L200 / Triton
  • Lancer
  • Outlander
  • Space Runner / RVR
  • Hyundai Elantra
  • Stellar
  • Eagle Talon / Plymouth Laser
  • Dodge Ram 50
  • Proton Perdana

4G63 Problems & Reliability

The appearance of vibration in 4G63T.The reason for this may be problems with the balance shafts, which are poorly lubricated under conditions of increased load, which leads to their vibration and ultimately to a wedge.
Repair consists in replacing worn balancing shafts. Another weak point of this power unit is the engine mountings, which are recommended to be replaced when vibration appears.
Floating revolutions.Problems can be caused by a temperature sensor, injectors, or a dirty throttle valve on carburetor versions of the engine.
Repair is complicated by the difficulty of diagnosing a failed element. It is especially difficult to find the cause on old engines that do not allow computer diagnostics of the engine.
The appearance of knocking in the engine under load.By 50,000 mileage, hydraulic lifters may die, as a result, a characteristic knock and problems in engine operation appear.
Repair in this case will consist in replacing failed hydraulic lifters. As a preventive measure, we can recommend that you use high-quality oil and change it every 10,000 kilometers.

Engines of the 4G63 series are reliable and have a solid resource for increasing power.

  • The simplest tuning option may be the use of upgraded shafts, which allow for about 20 horsepower gains in power. Simultaneously with the installation of the shafts, a cold start is replaced, and the firmware in the engine control unit is changed.
  • The naturally aspirated Lancer engine can be turbocharged from 4G63T, which allows an increase in engine power by 100-150 horsepower. In this case, the manifold, the cylinder head, the piston group, the pan, the liners and the fuel pump are changing.
  • It is possible to use spare parts from the Evolution sports modification, which allows you to get the engine power at the level of 200-250 horsepower. It should be said that this tuning option is of increased complexity and should be performed exclusively by experienced minders.
  • A relatively simple and inexpensive way to tune a this engine is to use a sports direct-flow exhaust system. Depending on the type of exhaust, the car gets about 20-25 additional horsepower. This changes the sound of the engine, which takes on a sporty note and begins to sound like a powerful eight-cylinder engine.


One of the features of this Mitsubishi power unit is the presence of two balancing shafts installed in antiphase. This virtually eliminates the resulting vibrations, especially at maximum engine speeds.

This engine can be used with vehicles in which the power unit is installed longitudinally and transversely. This allowed the 4G63 to be installed with equal ease on full-size sedans and station wagons, as well as on compact city cars.

Depending on its modification, this engine was equipped with a carburetor injection system, mono injection or an injector. Regardless of the fuel supply system used, this engine has established itself as a highly reliable and durable power unit.

The use of an injector with electric injectors made it possible to simultaneously increase engine power and improve its fuel efficiency. The power curve has been smoothed to provide excellent traction from low revs.

5/5 - (40 votes)

Leave a Comment