Mitsubishi 6G72 Engine (Overview, Problems, Reliability)

The 6G series is one of Mitsubishi’s most popular engine lines. It was created in 1986 and is still in use today.

The 6G family has five variants: 6G71, 6G72, 6G73, 6G74, and 6G75. I will not go over the entire 6G series in this article; instead, I will concentrate on the 6G72. 6G75 is still available in the 2021 Mitsubishi Montero (Pajero).

The 6G72 is a V-shaped cast iron six-cylinder engine with a 60-degree camber. The 6G72 cylinder head was made from aluminum, making it easy to lighten this power unit improving resistance to temperatures. To find out more about the 6G72, check out the rest of the article.

Mitsubishi 6G72 Pictures

Mitsubishi 6G72 Specs

ManufacturerMitsubishi Motors
Production years1986–Present
Fuel typeGasoline
Fuel systemMulti-port fuel injection/Direct injection
Configuration60° V6
Number of cylinders6
Valvetrain layoutSOHC/DOHC
Displacement2.0–3.8 L; 121.9–233.6 cu in (1,998–3,828 cc)
Cylinder bore74.7 mm (2.94 in)
83.5 mm (3.29 in)
91.1 mm (3.59 in)
93 mm (3.66 in)
95 mm (3.74 in)
Piston stroke76 mm (2.99 in)
85.8 mm (3.38 in)
90 mm (3.54 in)
Compression ratio8.0:1-10.5:1
Power output105–324 PS (77–238 kW; 104–320 hp)
Torque output116–315 lb-ft (157–427 N⋅m)
Engine weight342 lbs

Is Mitsubishi 6G72 Reliable?

Generally, the 6G74 engine has shown immense success capabilities. However, it is known for exceptionally high oil consumption, often associated with older cars. This is due to valve stem seals, which must be replaced on 6G74 at the first sign of oil consumption.

Mitsubishi 6G72 Problems and Solution

The 6G72 engine is inextricably linked to several issues. Here are some common problems with the Mitsubishi 6G72 and its solutions.

The appearance of minor knocks in the engine block

The problem lies in the hydraulic lifters with a high degree of probability. Replacing them for which the valve cover is removed is essential. In rare occurrences, the appearance of minor knocks in 6G72 is caused by the rotation of the connecting rod bushings. In this case, you need an expensive overhaul.

Floating engine speed

You are recommended to view the idle speed control. Its replacement or adjustment is not hard. Additionally, if there are such floating rpm, you should inspect the throttle valve or, better, clean it.

Noting interruptions in the operation of the engine

This might be due to several reasons. First of all, you are supposed to have the spark plugs replaced, which could quickly fail due to the use of fuels of low quality.

lost its power

After you have checked the compression, opening the motor is essential. Typically, loss of power problems might result in major replacements and overhauls of various major components.

Is the Mitsubishi 6G72 a good Engine?

This Japanese automaker has constantly been improving and upgrading its 6G72 engines. In fact, they used to make upgrades to its design every year. This explains the different varieties of these engines. However, all of them have proven to be easy to operate and quite reliable.

The 6G72 engine used to have a belt drive of its gas distribution mechanism, while the power unit’s design is made so that when the belt breaks, the piston will collide with the valves, which brings about costly repairs. The service work to replace the timing belt should be performed every 90,000 kilometers.

Generally, the 6CG72 engine has proven to be quite successful even though its oil consumption is high in older cars.

What cars have a 6G72?

6G72 engines are found in various vehicles, including Mitsubishi and other manufacturers such as Dodge, Hyundai, and Chrysler.

Mitsubishi Debonair1986–1992
Mitsubishi Sigma1988–1990
Mitsubishi Pajero/Montero/Shogun1988–Present
Mitsubishi Mighty Max1990–1996
Mitsubishi GTO1990–1999
Mitsubishi Diamante1990–2002
Mitsubishi L2001990–2006
Mitsubishi Delica1994–2007
Mitsubishi Pajero Sport/Montero Sport1997–2007
Mitsubishi Galant1999–2003
Mitsubishi 3000GT1991-1999
Mitsubishi Eclipse2000–2005
Dodge Stratus2001–2005
Dodge Shadow1992–1994
Dodge Stealth1991–1996
Hyundai Sonata1990–1998
Chrysler LeBaron1990–1995
Dodge Ram 501990–1993
Dodge Daytona1990–1993
Chrysler TC by Maserati1990–1991
Chrysler Town & Country1990
Dodge Spirit1989–1995
Dodge Dynasty1988–1993
Dodge Raider1988–1990
Chrysler New Yorker1988–1989
Dodge Caravan1987–2000

Final Words

The 6G72 engine is a superior six-cylinder power unit that first appeared in 1986 and could hold out on the assembly line until 2008. The engine has proven economical, extremely reliable, and easy to maintain. Thanks to its outstanding characteristics, the power unit enjoys having well-deserved love among many car owners.

Mitsubishi 6G72 Engine (Overview, Problems, Reliability) Pictures

Mitsubishi 6G72 Pictures