Category:
Sport Compact / Personal Luxury Coupe
Competitors:
Dodge Stealth (rebadged Mitsubishi 3000GT), Mazda RX-7, Toyota Supra, Nissan 300ZX.
Differentiators:
Exclusive to North America, shared platform with Dodge Stealth, advanced technology for its era (active aerodynamics, ECS suspension on some models).
Benefit:
Empowers owners to perform extensive maintenance and repairs, saving significant costs compared to dealership or independent shop labor rates.
Engine Mechanical:
Engine removal/installation, cylinder head, valve train, engine block, lubrication, intake manifold, exhaust system, cooling, heating, fuel and emissions.
Engine Performance:
Tune-up procedures, ignition, valve timing, chain/gear replacement, tensioner adjustments, timing marks.
Transmission:
Manual transmission, automatic transmission, differential, transaxle, clutch.
Steering:
Steering system components and repair.
Suspension:
Suspension system components and repair.
Brakes:
Brake system, including ABS.
Body:
Interior and exterior body repair, panels, trim, glass.
HVAC:
Heater and Air Conditioning, Automatic Climate Control.
Electrical:
General electrical systems, SRS (Supplemental Restraint System), wiring diagrams.
Routine Maintenance:
Oil changes, fluid changes, filter replacements, spark plug changes, air filter changes.
Major Repairs:
Engine rebuilds, transmission overhauls, clutch replacement, brake caliper replacement, suspension component replacement.
Diagnostics:
Troubleshooting guides, symptom-based diagnostics, identification of common issues.
Special Procedures:
Valve timing procedures, chain & gear replacement, tensioner release & reset methods, chain routing & sprocket/gear valve timing marks.
Depth:
From basic fluid changes and routine maintenance to complete engine and transmission rebuilds and complex electrical system diagnostics.
Detail Level:
Detailed illustrations and step-by-step instructions for repairs and procedures.
Configuration:
3.0L (181 cu in) SOHC V6 (non-turbo) and DOHC V6 (twin-turbo)
Horsepower Non Turbo:
222 hp @ 6000 rpm (approx.)
Torque Non Turbo:
205 lb-ft @ 4500 rpm (approx.)
Horsepower Twin Turbo:
300 hp @ 6000 rpm (approx.)
Torque Twin Turbo:
307 lb-ft @ 2500 rpm (approx.)
Induction:
Multi-point Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (91 octane recommended for twin-turbo)
Coolant Capacity:
Approx. 9.2 L (9.7 US qt) with 50/50 mix
Oil Capacity:
Approx. 5.0 L (5.3 US qt) with filter change
Belt Replacement Interval:
Refer to manual, typically around 60,000 miles for V6 6G72 engines.
Type:
5-speed Manual Transmission
Type:
4-speed Automatic Transmission (with electronically controlled traction assist on some models)
AWD:
All-wheel drive (AWD) with Active Four-Wheel Steering (4WS) available on higher trims (Twin-Turbo).
Manual Transmission Fluid:
Refer to manual for specific API GL-4 or GL-5 gear oil recommendation (e.g., Mitsubishi DiaQueen Super Hypoid Gear Oil GL-5).
Automatic Transmission Fluid:
Mitsubishi ATF SP-II or equivalent.
Length:
4,600 mm (181.1 in)
Width:
1,840 mm (72.4 in)
Height:
1,250 mm (49.2 in) (lower for Stealth R/T Twin-Turbo)
Curb Weight:
Approx. 1,590-1,720 kg (3,500-3,790 lb) depending on trim and drivetrain.
Wheelbase:
2,500 mm (98.4 in)
Track Width Front:
Approx. 1,535 mm (60.4 in)
Track Width Rear:
Approx. 1,530 mm (60.2 in)
Standard Wheel Size:
16-inch alloy wheels
Optional Wheel Size:
17-inch alloy wheels (on Twin-Turbo models)
Standard Tire Size:
205/55R16
Optional Tire Size:
225/50R16 (front), 245/45R17 (rear) on Twin-Turbo models
NHTSA Frontal Crash:
Not specifically rated or data unavailable for this era.
ABS:
Anti-lock Braking System (ABS) standard on most models, optional on base models.
Traction Control:
Traction Control System (TCS) available on Twin-Turbo models.
Suspension Control:
Electronic Controlled Suspension (ECS) available on some Twin-Turbo models, allowing driver adjustment of damping.
Airbags:
Driver and passenger front airbags (SRS).
Seat Belts:
Three-point front seat belts with pretensioners, rear seat belts.
Audio System:
Factory premium audio systems, often with cassette decks and CD players in later models.
Active Aero:
Active aero front spoiler on certain Stealth models, adjusting based on speed.
Communication:
Analog systems typical for the era, no modern Bluetooth or smartphone integration.
Oil Change Interval:
Typically every 5,000 to 7,500 miles (8,000 to 12,000 km) or 6 months, depending on driving conditions.
Transmission Fluid Change:
Automatic transmission: every 30,000-50,000 miles (48,000-80,000 km). Manual transmission: refer to manual, often longer intervals.
Spark Plug Replacement:
Refer to manual, typically 30,000-60,000 miles depending on plug type (copper vs. platinum).
Timing Belt Replacement:
Crucial for 6G72 engines, generally 60,000 miles. Failure can cause severe engine damage.
Power Steering Fluid:
Refer to manual, typically Dexron II/III ATF or a specific power steering fluid.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Coolant:
Ethylene glycol based antifreeze, 50/50 mix with distilled water.
Electrical:
Corrosion in wiring harnesses, failing climate control modules, intermittent gauge issues.
Engine:
Timing belt failures if not replaced on schedule, oil leaks, fuel injector issues.
Transmission:
Automatic transmission clutch pack wear, manual transmission synchro issues on high-mileage cars.
Suspension Steering:
ECS system failures (struts, control modules), wear in ball joints and tie rod ends.
Body Chassis:
Rust in wheel wells and rocker panels, especially in salt-belt regions.
Motorsport Connection:
Mitsubishi has a strong rally heritage (Ralliart), though the Stealth itself wasn't a direct rally homologation special.
Development:
Developed in collaboration with Chrysler Corporation and manufactured by Mitsubishi.
Facelift:
Minor cosmetic updates and feature enhancements throughout its production run, including revised front and rear styling.
Production Period:
1990 (for 1991 model year) - 1996
Manufacturing Location:
Japan (Nagoya Plant)
Market Performance:
Moderate sales success, particularly the higher-performance Twin-Turbo models, but less than some direct competitors.
