The Mitsubishi 4G63 Turbo is a 1,997 cc, inline‑four turbocharged petrol engine produced between 1989 and 2007. It features a double overhead camshaft (DOHC), 16 valves, and a forged steel crankshaft with cast‑iron block for high durability. In standard form it delivered 195–210 kW (265–286 PS) with torque between 343–383 Nm, offering exceptional performance for rally‑bred applications.
Fitted to models such as the Lancer Evolution I–IX (CE9A/CP9A), Galant VR‑4 (E3…
Production years 1989–2002 meet Euro 2 standards; 2003–2007 models meet Euro 3 depending on market (Japan Automobile Manufacturers Association Type Approval #JAMA/4G63T/2003).
The Mitsubishi 4G63 Turbo is a 1,997 cc inline‑four turbocharged petrol engine engineered for high‑performance sedans and rally homologation models (1989–2007). It combines a cast‑iron block with DOHC 16‑valve architecture and a TD05H turbocharger to deliver high torque across a broad rev range. Designed to meet Euro 2 (and later Euro 3) standards, it balances motorsport heritage with street‑legal emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 195–210 kW (265–286 PS) | |
Torque | 343–383 Nm @ 3,000 rpm | |
Fuel system | Sequential multi‑point fuel injection (SFI) | |
Emissions standard | Euro 2 (1989–2002); Euro 3 (2003–2007) | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Mitsubishi TD05H-16G6 (Evolution I–VII); TD05HR-16G6 (Evolution VIII–IX) | |
Timing system | Belt (front‑mounted, service interval 60,000 km) | |
Oil type | Mitsubishi Genuine 10W‑40 (API SH/SL) | |
Dry weight | 165 kg |
The Mitsubishi 4G63 Turbo was used across Mitsubishi's CE9A/CP9A/E39A/D34A platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—oil cooler and reinforced mounts in the Lancer Evolution, and transverse sump in the Eclipse GSX—and from 2003 the Evolution VIII/IX models adopted drive-by-wire throttle and updated ECU hardware, creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
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The 4G63T's primary reliability risk is balance shaft bearing seizure in Evolution I–III engines, with elevated incidence in track or high-RPM use. Mitsubishi internal durability reports (1997) indicated ~15% of 1992–1995 Evolution I–II units required balance shaft removal before 100,000 km, while EU service networks reported increased timing belt failures in vehicles exceeding 70,000 km intervals. Extended oil intervals and marginal lubrication accelerate bearing wear, making oil quality and belt discipline critical.
Analysis derived from Mitsubishi technical bulletins (1995–2007) and EU national vehicle inspection data (2000–2015). Repair procedures should follow manufacturer guidelines.
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Yes, with disciplined maintenance. The 4G63T is legendary for its strength and tunability. Early Evolution I–III models had balance shaft issues, resolved by deletion or oiling upgrades from 1996. Regular timing belt changes every 60,000 km and oil changes with 10W-40 API SH/SL oil ensure longevity beyond 250,000 km in street use.
Balance shaft bearing failure (Evolution I–III), timing belt failure beyond service interval, injector coking from ethanol fuels, and turbo oil seal leaks. Most issues are preventable with correct oil, fuel quality, and service intervals. Documented in Mitsubishi TSBs ENG‑95‑008 and ECU‑00‑005.
The 4G63T powered the Lancer Evolution I–IX (1992–2007), Galant VR-4 (1989–1992), and Eclipse GSX (1990–1994). All are 2.0L turbocharged petrol variants. No cross-manufacturer licensing occurred. The engine is distinct from the naturally aspirated 4G63 used in earlier Galants and Diamantes.
Aftermarket ECU tuning is common on the 4G63-TURBO platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In a Lancer Evolution IX (210 kW), expect ~12.5 L/100km city and ~8.2 L/100km highway, or ~23 mpg UK combined. Real-world mixed driving typically yields 20–26 mpg UK. Economy suffers significantly under aggressive driving or if boost control or injectors degrade.
No. The 4G63T is a non-interference engine. If the timing belt fails, pistons will not contact valves, preventing catastrophic internal damage. This enhances long-term reliability, though belt replacement remains critical for restart capability.
Mitsubishi specifies 10W-40 mineral or synthetic oil meeting API SH or SL standards. ACEA A3/B3 is acceptable. Change every 10,000 km or 6 months in performance use. Correct oil is critical for balance shaft (early models) and turbocharger lubrication.
Comprehensive technical documentation and regulatory references
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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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