The Mitsubishi 6G74 (DOHC 24V) is a 3,497 cc, V6 naturally aspirated petrol engine produced between 1993 and 006. It features a cast‑iron block, aluminium cylinder heads, dual overhead camshafts (DOHC), and 24 valves (4 per cylinder). In standard form it delivers 147–177 kW (200–240 PS) and 304–330 Nm of torque, offering smooth high‑rpm power with refined V6 character.
Fitted to models such as the Pajero (V30/V40), Diamante (LA/LB), and Galant VR — 4 (E58A), the 6G74 DOHC w…
Production years 1993–1996 meet Euro 1 standards; 1997–2000 models meet Euro 2; 2001–2006 variants meet Euro 3 (JAMA Type Approval #JAMA/EMS/3312; EU Certificate of Conformity 2007/46/EC).
The Mitsubishi 6G74 (DOHC 24V) is a 3,497 cc V6 naturally aspirated petrol engine engineered for performance sedans and premium SUVs (1993–2006). It combines a durable cast‑iron block with DOHC 24‑valve architecture to deliver smooth high-rpm power and refined driving dynamics. Designed to meet Euro 1–3 standards in later production, it balances performance with regulated emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,497 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 93.0 mm × 86.0 mm | |
Power output | 147–177 kW (200–240 PS) @ 5,500–6,500 rpm | |
Torque | 304–330 Nm @ 4,000–4,500 rpm | |
Fuel system | Sequential multi‑point fuel injection (SFI) | |
Emissions standard | Euro 1 (1993–1996); Euro 2 (1997–2000); Euro 3 (2001–2006) | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven DOHC (two belts) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 182 kg |
The Mitsubishi 6G74 (DOHC 24V) was used across Mitsubishi's V30/V40, LA/LB, and E58A platforms with longitudinal mounting and co-developed for global performance applications. This engine received platform-specific adaptations—reinforced mounts in the Pajero V40 for off‑road durability and revised intake manifolds in the Diamante LB—and from 2000 the HLA upgrade created minor service part interchange limits. All adaptations are documented in OEM technical bulletins.
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The 6G74 (DOHC 24V)'s primary reliability risk is hydraulic lash adjuster (HLA) wear in early builds, with elevated incidence in high-mileage or infrequently serviced vehicles. Mitsubishi internal data from 1999 indicated a notable share of pre‑2000 engines requiring HLA replacement before 150,000 km, while EU RAR data links a measurable portion of valve train noise complaints to oil-related HLA faults. Extended oil intervals and non-spec oil increase clogging risk, making oil quality and interval adherence critical.
Analysis derived from Mitsubishi technical bulletins (1998–2004) and EU RAR failure statistics (2000–2015). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 6G74 DOHC is generally reliable with proper maintenance. Early models (1993–1999) had HLA issues, but post-2000 revisions improved durability. Regular timing belt changes every 100,000 km and using correct 10W‑30/40 oil greatly enhance longevity.
Top issues include hydraulic lash adjuster ticking/failure, timing belt breakage in interference configuration, intake manifold vacuum leaks, and ignition coil degradation. These are documented in Mitsubishi service bulletins SB‑98‑0051 and TIS updates.
The 3.5L DOHC V6 appeared in the Pajero/Shogun (1993–2006), Diamante (1993–2005), and Galant VR-4 (1994–1996). It was also used by Hyundai in the Grandeur XG (1999–2005) under OEM licensing. Later models meet Euro 3 standards.
Modest gains are possible. ECU remaps typically yield +15–25 kW by optimising ignition and fuel timing. Forced induction is not recommended without internal upgrades. Most owners report improved throttle response and high-rpm smoothness.
Moderate for a 3.5L V6. In a Pajero 3.5 V6, expect ~12.8 L/100km (city) and ~9.2 L/100km (highway), or about 22 mpg UK combined. Real-world mixed driving typically returns 19–25 mpg (UK), depending on load and terrain.
Yes. The 6G74 DOHC is an interference engine. If either timing belt fails, piston-to-valve contact can cause catastrophic damage. This is why strict adherence to the 100,000 km or 5-year replacement interval is critical.
Mitsubishi specifies SAE 10W‑30 or 10W‑40 oil meeting ACEA A3/B3 or Mitsubishi MTF‑01 standards. Modern low-SAPS (ACEA C) oils should be avoided as they lack sufficient anti-wear additives for older valvetrain components. Change every 7,500 km in severe conditions.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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