🏷️ Basic Information

Make:

Mitsubishi

Model:

3000GT

Year:

1998

Chassis Code:

Z16A (for twin-turbo models)

Engine Code Primary:

6G72 (3.0L V6 DOHC Twin-Turbocharged)

Engine Code Naturally Aspirated:

6G72 (3.0L V6 SOHC or DOHC)

👋 Introduction

Positioning:

The Mitsubishi 3000GT (also known as GTO in Japan) was a flagship sports car for Mitsubishi, positioned as a high-performance, technologically advanced grand tourer competing with cars like the Nissan 300ZX, Toyota Supra, and Mazda RX-7.

Competitors 1998:

Nissan 300ZX (Z32), Toyota Supra (JZA80), Mazda RX-7 (FD), Chevrolet Corvette (C5), Dodge Viper.

Technological Advancements:

Available with sophisticated technologies such as all-wheel drive (AWD), four-wheel steering (4WS), active aerodynamics (active front spoiler and rear wing), and electronically controlled suspension (ECS).

Engine Variants:

Offered in naturally aspirated (SOHC and DOHC) and twin-turbocharged variants, with the twin-turbo model being the most powerful and technologically advanced.

📋 Manual Details

Coverage:

Comprehensive mechanical and electrical repair and service information for the 1998 Mitsubishi 3000GT, covering all major systems and components.

Estimated Pages:

Over 2000 pages (typical for official factory service manuals)

Type:

Factory Service Manual (FSM) / Repair Manual Software

Language:

English

Format:

Software (likely digital format such as PDF or proprietary software)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, disassembly, inspection, lubrication, cooling system, fuel system, emission control systems, intake and exhaust systems.

Engine Management:

Engine control unit (ECU) operation, sensors, actuators, ignition system, fuel injection, diagnostic trouble codes (DTCs), scan tool procedures.

Transmission Manual:

6-speed Getrag manual transmission overhaul, clutch system, gearshift mechanism, maintenance, and repair.

Transmission Automatic:

4-speed automatic transmission (V4A51) overhaul, torque converter, shift control, maintenance, and repair.

Drivetrain:

All-wheel drive (AWD) system, Active Electronically Controlled All-Wheel Drive (AWC/4WAS) operation, transfer case, propeller shaft, differentials (front and rear), CV joints, driveshafts.

Suspension:

Front and rear suspension systems, MacPherson struts, multi-link rear suspension, springs, shock absorbers, control arms, bushings, alignment specifications, electronically controlled suspension (ECS) if applicable.

Steering:

Power steering system, steering rack, pump, hydraulic lines, Four-Wheel Steering (4WS) system operation and service.

Brakes:

Front and rear brake systems, ventilated discs, calipers, ABS (Anti-lock Braking System), EBD (Electronic Brake-force Distribution), brake fluid specifications, bleeding procedures, parking brake.

Electrical System:

Battery, starting system, charging system (alternator), lighting system (headlights, taillights, interior), wiring diagrams, fuses, relays.

Body And Interior:

Body panel removal and installation, interior trim, seats, glass, doors, latches, locks, bumpers, paint and corrosion protection.

Climate Control:

Air conditioning system (refrigerant type, capacities, service), heating system, ventilation, blower motor, climate control panel.

Safety Systems:

Airbag system operation, SRS (Supplemental Restraint System) components, seat belts.

Scheduled Maintenance:

Detailed schedules for oil changes, filter replacements, tune-ups, fluid checks, belt inspections, and other routine maintenance tasks.

Troubleshooting:

Systematic diagnostic procedures for identifying and resolving common and uncommon issues, including symptom-based troubleshooting guides.

Repair Procedures:

Step-by-step instructions for the removal, installation, adjustment, and repair of all major vehicle components and systems.

Diagnostics:

On-board diagnostic (OBD-II) information, DTC interpretation, live data stream analysis, sensor testing, actuator testing.

Specifications:

Torque specifications for all fasteners, critical clearances, fluid capacities, pressure specifications, resistance values.

Depth:

Complete factory-level repair and diagnostic information, suitable for professional technicians and advanced DIY enthusiasts. Includes detailed explanations of system operation and theory.

📊 Manual Specifications

Digital Format:

Likely PDF, CHM, or proprietary executable software. Searchable text and interactive diagrams are expected for software versions.

Printability:

High-resolution images and diagrams, suitable for printing specific sections or the entire manual.

Binding:

N/A (Software)

Paper Quality:

N/A (Software)

⚙️ Engine Specifications

Engine Type:

6G72, 3.0L (2972cc) V6, DOHC, Twin-Turbocharged

Bore X Stroke:

86.0 mm x 86.0 mm

Compression Ratio Twin Turbo:

8.0:1

Horsepower Twin Turbo:

320 hp @ 6000 rpm (approx.)

Torque Twin Turbo:

315 lb-ft @ 2500 rpm (approx.)

Horsepower Naturally Aspirated:

218-222 hp (depending on SOHC/DOHC configuration)

Torque Naturally Aspirated:

205-210 lb-ft (depending on SOHC/DOHC configuration)

Fuel Delivery:

Electronic Multi-Point Fuel Injection (MPI)

Fuel Type:

Unleaded Premium Gasoline (91 octane or higher recommended for twin-turbo)

🔧 Transmission

Standard Transmission:

6-speed Manual (Getrag G5M-31)

Optional Transmission:

4-speed Automatic (V4A51) with electronic control

AWD Integration:

All-wheel drive system integrated with both manual and automatic transmissions, featuring active torque distribution.

Gear Ratios Manual:

Specific gear ratios for the 6-speed manual are detailed in the manual.

Gear Ratios Automatic:

Specific gear ratios for the 4-speed automatic are detailed in the manual.

📐 Dimensions

Length:

4615 mm (181.7 in)

Width:

1840 mm (72.4 in)

Height:

1250 mm (49.2 in) (Ground clearance will vary)

Wheelbase:

2500 mm (98.4 in)

Curb Weight Twin Turbo:

Approximately 1500-1600 kg (3300-3500 lbs) depending on trim and options.

Curb Weight Na:

Approximately 1450-1550 kg (3195-3415 lbs) depending on trim and options.

Trunk Volume:

Approximately 160-180 liters (5.6-6.3 cu ft), often with a compact spare tire.

🛡️ Safety Features

NHTSA Ratings:

Specific NHTSA ratings for the 1998 model are not readily available but were generally considered good for its class and era. The manual will detail safety system components.

ABS:

Standard Anti-lock Braking System (ABS) on all models.

Traction Control:

Active Skid Control (ASR) or traction control system often standard or available on AWD models.

4Ws:

Optional Four-Wheel Steering (4WS) system for improved agility.

Airbags:

Driver and passenger front airbags (SRS).

Seat Belts:

3-point seat belts with pretensioners for front occupants.

Body Structure:

Reinforced safety cage and crumple zones.

💡 Technology Features

Audio System:

Factory premium audio systems often included CD players, cassette decks, and multiple speakers. The manual will detail their operation and troubleshooting.

Ecs:

Electronically Controlled Suspension (ECS) was available, allowing driver adjustment of damping rates. The manual provides service procedures for this system.

Active Aero:

Early second-generation models featured active front spoiler and active rear wing, controlled by vehicle speed. These were often deleted in later years for simplicity and weight reduction, but the manual would cover their diagnostics if present.

OBD Ii:

The 1998 model year conforms to OBD-II standards, enabling diagnostic scanning of engine and other systems. The manual details the diagnostic connectors and protocols.

🔧 Maintenance

Oil Change Interval:

Every 3,750 to 7,500 miles (6,000 to 12,000 km) or 6-12 months, depending on driving conditions. The manual will provide precise recommendations.

Timing Belt Replacement:

Every 60,000 to 90,000 miles (96,000 to 144,000 km). This is a critical maintenance item for the 6G72 engine due to interference design. The manual will specify the exact interval.

Coolant Flush:

Every 30,000 miles (48,000 km) or 2-3 years.

Engine Oil Type:

API SG/SH or ILSAC GF-1 certified. Viscosity typically 10W-30 or 10W-40, but consult the manual for specific temperature ranges.

Engine Oil Capacity:

Approx. 4.5 - 5.0 liters (4.8 - 5.3 US quarts) with filter, for the 3.0L V6.

Coolant Type:

Ethylene glycol-based antifreeze, typically a 50/50 mix with deionized water. Mitsubishi Super Long Life Coolant (SLLC) or equivalent is often specified.

Transmission Fluid Manual:

API GL-4 or GL-5, SAE 75W-90 synthetic gear oil. Consult the manual for specific recommendations.

Transmission Fluid Automatic:

Mitsubishi Diamond SP-II or SP-III ATF (Automatic Transmission Fluid) or equivalent. Capacity approx. 3.5-4.0 liters (3.7-4.2 US quarts) for a drain and fill.

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid.

Power Steering Fluid:

Dexron III ATF or equivalent specified power steering fluid.

Engine:

Potential for oil leaks, spark plug blowouts on some early models, issues with the variable induction system (VIS) on naturally aspirated models, and coolant leaks from the rear cylinder bank due to its orientation.

Turbocharger:

Turbocharger seals can degrade over time, leading to oil consumption or smoke. Intercooler hoses can crack.

Suspension:

Wear on bushings and ball joints, particularly on AWD and 4WS models. ECS systems can develop leaks or electronic faults.

Electrical:

Corrosion in connectors, failing window motors, issues with climate control panels and ABS sensors.

Drivetrain:

Wear in AWD center differentials or CV joints if maintenance is neglected. Clutch wear on manual transmissions.

📚 Vehicle History

Mitsubishi Performance:

Mitsubishi has a strong motorsport heritage, particularly in rallying (Group A, WRC), which influenced the development of performance vehicles like the 3000GT.

First Generation:

The 3000GT/GTO was introduced globally in 1990 (as a 1991 model year in most markets). The 1998 model represents the second generation (Z16A), which received a significant facelift in 1993.

Second Generation Facelift:

The 1993 facelift brought revised styling, improved aerodynamics (including active aero deletion on some models for weight savings), updated suspension tuning, and a horsepower increase for the twin-turbo model.

Production Period:

1990-2000 (Global)

Assembly Location:

Japan

🏆 Awards & Recognition

Automotive Press Awards:

While specific major awards for the 1998 model year are not as prominent as its initial launch, the 3000GT was consistently recognized for its advanced technology and performance by automotive journalists worldwide during its production run.