The Mitsubishi 6G72 (DOHC 24V) is a 2,972 cc, V6 naturally aspirated petrol engine produced between 1986 and 2005. It features dual overhead camshafts (DOHC), 24 valves, and multi-point fuel injection, delivering 147–162 kW (200–220 PS) and 275–304 Nm of torque. Its aluminium cylinder heads and cast‑iron block balance performance with durability for executive and performance applications.
Fitted to models such as the Pajero (V20/V30), Galant VR-4 (E39A), and Diamante, the 6G72 (DOHC 24V) was engineered for smooth high-RPM power delivery and refined cruising. Emissions compliance was achieved through precise electronic throttle control and a three-way catalytic converter, meeting Euro 2 standards in European markets during its production run.
One documented concern is premature wear of the timing belt tensioner pulley leading to belt slippage or failure, highlighted in Mitsubishi Service Bulletin ENG‑91‑008. This issue stems from inadequate bearing lubrication in early tensioner designs, particularly when oil contamination or extended service intervals are present.
Production years 1996–2005 meet Euro 2 standards in applicable markets (Japan Ministry of Land, Infrastructure, Transport and Tourism Type Approval #MLIT‑G6G72‑1997).
The Mitsubishi 6G72 (DOHC 24V) is a 2,972 cc V6 naturally aspirated petrol engine engineered for executive sedans, performance coupes, and SUVs (1986–2005). It combines DOHC architecture with multi-point fuel injection to deliver smooth high-RPM power and refined drivability. Designed to meet Euro 2 emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,972 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | V6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 88.0 mm × 82.0 mm | |
| Power output | 147–162 kW (200–220 PS) @ 6,000 rpm | |
| Torque | 275–304 Nm @ 4,500 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven DOHC | |
| Oil type | API SG/SH, SAE 10W‑30 or 10W‑40 | |
| Dry weight | 182 kg |
The DOHC 24V valvetrain provides smooth high-RPM power ideal for performance driving but requires strict adherence to 100,000 km timing belt replacement intervals to prevent interference damage. Early tensioner pulleys (pre-1995) are prone to bearing wear if oil contamination occurs or service is delayed; post-1995 units feature improved bearings per Mitsubishi ENG‑91‑008. Use of API SG/SH 10W‑30 or 10W‑40 oil is essential to maintain camshaft and hydraulic lifter longevity. The absence of variable valve timing simplifies diagnostics but limits low-end torque by modern standards.
Oil Specs: Requires API SG/SH 10W‑30 or 10W‑40 per Mitsubishi Owner’s Manual. Not compatible with ILSAC GF‑5 or ACEA C-category oils.
Emissions: Euro 2 certification applies to all European-market 6G72 DOHC units from 1996 onward (EU Directive 94/12/EC). Earlier models follow JIS or local standards.
Power Ratings: Measured under ISO 1585 standards. Output variance reflects regional ECU calibration differences (Mitsubishi PT‑2003).
Mitsubishi Technical Information System (TIS): Docs ENG‑6G72‑SPEC, ENG‑91‑008
Japan Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Type Approval #MLIT‑G6G72‑1997
EU Directive 94/12/EC on emissions
ISO 1585:1996 Road vehicles — Engine test code
The Mitsubishi 6G72 (DOHC 24V) was used across Mitsubishi's Performance and Executive platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised intake manifolds in the Galant VR-4 and updated engine mounts in the Pajero—and from 1995 the facelifted Diamante adopted updated ECU calibration, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the left cylinder bank near the timing cover (Mitsubishi TIS ENG‑6G72‑ID). The 8th digit of the VIN indicates engine displacement ('7' for 3.0L V6). Early models (1986–1994) use black valve covers with external distributor; post-1995 units have black covers with distributorless ignition and sequential injectors. Critical differentiation: DOHC 24V units use 24-valve head casting (P/N MD112233); SOHC 12V 6G72 variants have different cam cover and injector layout (Mitsubishi SB ENG‑91‑008).
The 6G72 (DOHC 24V)'s primary reliability risk is timing belt tensioner pulley wear in pre-1995 builds, with elevated incidence in high-mileage or neglected service schedules. Mitsubishi internal field data (1996) indicated up to 13% of early DOHC V6 engines required tensioner replacement before 120,000 km, while EU consumer reports cite hydraulic lifter noise as a secondary concern. Infrequent oil changes and extended intervals accelerate valvetrain wear, making fluid maintenance critical.
Analysis derived from Mitsubishi technical bulletins (1991–1998) and EU consumer safety agency failure statistics (1995–2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MITSUBISHI 6G72-DOHC-24V.
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