The Mitsubishi 3G8 engine is a range of three-cylinder

powerplant Propulsion is the generation of force by any combination of pushing or pulling to modify the translational motion of an object, which is typically a rigid body (or an articulated rigid body) but may also concern a fluid. The term is derived from ...

from

Mitsubishi Motors is a Japanese multinational automobile manufacturer headquartered in Minato, Tokyo, Japan.Mitsubishi Minica The is a kei car produced by Mitsubishi Motors mainly for the Japanese domestic market from 1962 to 2011. It was first built by Shin Mitsubishi Heavy-Industries, one of Mitsubishi Heavy Industries' three regional automotive companies until they we ...

'' kei car''. In common with other contemporary engines in the class, it could be specified with many advanced technologies despite its diminutive size, including

multi-valve In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better breathing and may be able to operate at higher revolutions per minute (RPM) than a two-valve engine ...

cylinder head In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber. In sidevalve engines, the head is a simple sheet of metal; whereas in more modern ...

s and

double overhead camshaft An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

s. The top-of-the-line ''Dangan ZZ'' variant was also the first kei car to benefit from

turbocharging In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pr ...

. In 1987 Mitsubishi was the first manufacturer to supercharge a kei vehicle, and in 1989 became the world's first production car to feature five valves per cylinder, ahead of similar developments by Bugatti,

Audi Audi AG () is a German automotive manufacturer of luxury vehicles headquartered in Ingolstadt, Bavaria, Germany. As a subsidiary of its parent company, the Volkswagen Group, Audi produces vehicles in nine production facilities worldwide. Th ...

, Ferrari and

Toyota is a Japanese multinational automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on . Toyota is one of the largest automobile manufacturers in the world, producing about 10 ...

. Its 3G81 three-cylinder engine has a

displacement Displacement may refer to: Physical sciences Mathematics and Physics * Displacement (geometry), is the difference between the final and initial position of a point trajectory (for instance, the center of mass of a moving object). The actual path ...

of and the 15-valve versions feature three intake valves and two exhaust valves incorporated into each cylinder. The valves are controlled by twin overhead camshafts through roller

cam follower In mechanical engineering, a cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to follow cam lobe profiles. Cam followers come in a vast array of different configurations, however the most de ...

s on finger rockers with hydraulic automatic lash adjusters. Gasoline is electronically injected through triple-jet nozzles (also a technological first). The

water-cooled Cooling tower and water discharge of a nuclear power plant Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...

turbocharger operates through an air-to-air intercooler. The ignition timing advance is also controlled electronically, and a knock-sensing system is included. Originally a engine, it was enlarged to in 1990 following changes in the class regulations. The four-cylinder 4A3 engine is derived from the 3G8, sharing a bore pitch.

3G81

''Engine dimensions'' — inline three-cylinder
''Bore'' —
''Stroke'' —
''Fuel type'' — Unleaded regular gasoline Versions

3G82

''Displacement'' —
''Bore'' —
''Stroke'' —
''Engine type'' — Inline three-cylinder SOHC 6 valves
''Power'' — at unknown rpm This was built only for the Taiwanese market Mitsubishi Towny (Minica) and Minicab 800, from 01.87 - 11.88. Most specifications are unknown.

3G83

''Displacement'' —
''Bore'' —
''Stroke'' —
''Fuel type'' — Unleaded regular gasoline

Double carb (1990)

*''Engine type'' — Inline three-cylinder SOHC *''Power'' — at 6000 rpm *''Torque'' — at 4000 rpm *''Fuel system'' — two-barrel down-draft carburettor *''Compression ratio'' — 9.8:1

DOHC (1990)

*''Engine type'' — Inline three-cylinder DOHC *''Compression ratio'' — 9.8:4 *''Fuel system'' — ECI multiple *''Power'' — at 7500 rpm *''Torque'' — at 5700 rpm

Turbo (1990)

*''Engine type'' — Inline three-cylinder DOHC 15-valve intercooled turbo *''Compression ratio'' — 8.5:1 *''Fuel system'' — ECI multiple *''Power'' — at 7,500 rpm *''Torque'' — at 4,500 rpm

4G82

''Displacement'' —
''Bore'' —
''Stroke'' —
''Engine type'' — Inline four-cylinder SOHC
''Power'' — JIS at 5,500 rpm
''Torque'' — at 3,500 rpm Of the same dimensions as the 3G82 but with a fourth cylinder, this was built in Taiwan by CMC (China Motor Corporation). Used in the Mitsubishi Varica (LWB version of fourth generation

Mitsubishi Minicab The is the kei truck and microvan, built and sold in Japan by Japanese automaker Mitsubishi Motors since 1966. In Japan, it was sold at a specific retail chain called Galant Shop. An all-electric model of the Minicab, called the Minicab MiEV, ...

References

{{Mitsubishi Motors technologies 3G8 Straight-three engines Gasoline engines by model