🏷️ Basic Information

Make:

Mitsubishi

Model:

Galant

Year:

1991

Chassis Code:

E33A (for certain engine/drivetrain configurations)

Engine Codes Common:

4G63 (2.0L DOHC), 4G63T (2.0L DOHC Turbo), 4G37 (1.8L SOHC)

👋 Introduction

Market Position:

The 1991 Mitsubishi Galant represented a significant evolution in the model's history, aiming to compete in the mid-size sedan market with a focus on sporty handling and advanced features for its time, particularly with the performance-oriented GSX model.

Competitive Analysis:

Competed against rivals such as the Honda Accord, Toyota Camry, Nissan Maxima, Ford Taurus, and Chevrolet Lumina. The Galant distinguished itself with available all-wheel drive and turbocharged engines, offering a sportier alternative in a segment often dominated by comfort and fuel economy.

Key Features:

Advanced multi-link suspension, active four-wheel steering (optional in some markets, but a key tech for the generation), aerodynamic design, emphasis on driver engagement.

📋 Manual Details

Coverage Areas:

All mechanical and electrical systems, bodywork, maintenance, troubleshooting, diagnostics, repair procedures, specifications.

Diagnostic Trouble Codes:

Coverage of diagnostic trouble codes (DTCs) for engine management and other electronic systems, with troubleshooting flowcharts.

Page Count:

Estimated 1000+ pages (typical for comprehensive service manuals of this era, software format may vary).

Manual Type:

Official Factory Service Manual (Software Edition)

Language:

English

Format:

Digital Software (likely PDF or proprietary format)

📖 Manual Coverage

Systems Covered:

Engine (mechanical, lubrication, cooling, fuel, ignition, emissions), Drivetrain (manual & automatic transmissions, differentials, axles, driveshafts), Brakes (hydraulic, parking brake, ABS if equipped), Steering & Suspension (power steering, alignment, suspension components), Electrical System (battery, charging, starting, lighting, instrumentation, body electrical, ECU diagnosis), HVAC (heating, ventilation, air conditioning), Body & Chassis (body construction, doors, windows, interior trim, collision repair basics), Fuel Tank & Lines, Exhaust System, Wheels & Tires.

Advanced Systems:

Electronic Control Unit (ECU) and sensor diagnostics, multiplex communication systems (if applicable), cruise control system, anti-lock braking system (ABS) diagnosis.

Bodywork:

Detailed diagrams for interior and exterior trim removal and installation, door panel disassembly, mirror replacement, bumper cover repair.

Procedures Included:

Engine torque specifications for critical components (head bolts, main bearings, rod caps), piston ring and bearing clearance specifications, valve clearance adjustment procedures.

Technical Depth:

Includes detailed torque sequences, component measurements, troubleshooting trees based on symptoms, and repair illustrations.

📊 Manual Specifications

File Format:

Digital (e.g., PDF, searchable text for ease of navigation)

Searchability:

Likely features searchable text, allowing users to quickly find specific topics or components.

Print Quality:

N/A (Digital Format)

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine:

2.0L DOHC 16-Valve Inline-4 (4G63)

Horsepower 4G63:

Approximately 135-140 hp @ 6000 rpm

Torque 4G63:

Approximately 125-130 lb-ft @ 4000 rpm

Horsepower 4G63T Gsx:

Approximately 195 hp @ 6000 rpm

Torque 4G63T Gsx:

Approximately 203 lb-ft @ 3500 rpm

Compression Ratio 4G63:

9.5:1

Compression Ratio 4G63T:

8.5:1

Fuel System:

Electronic Fuel Injection (EFI)

Fuel Type Recommended:

Unleaded gasoline (87 octane for naturally aspirated, 91 octane for turbocharged models)

Fuel Pump Pressure:

Approximately 36-44 psi (for EFI systems).

Engine Variants:

1.8L SOHC 16-valve (4G37), 2.0L DOHC 16-valve (4G63), 2.0L DOHC 16-valve Turbocharged (4G63T).

Engine Displacement 1 8L:

1830 cc

Engine Displacement 2 0L:

1997 cc

🔧 Transmission

Standard Transmission:

5-speed Manual Transmission

Optional Transmission:

4-speed Automatic Transmission (with lock-up torque converter)

AWD Availability:

Available on GSX models, often paired with the turbocharged engine and manual transmission.

Transmission Fluid Type:

Manual: API GL-4 (e.g., Mitsubishi DiaQueen Super Synthetic Gear Oil) or equivalent. Automatic: ATF SP-III or equivalent.

Drivetrain Options:

Front-Wheel Drive (FWD), All-Wheel Drive (AWD) available on select models (GSX).

📐 Dimensions

Length:

Approximately 181.9 inches

Width:

Approximately 69.1 inches

Height:

Approximately 55.1 inches

Wheelbase:

Approximately 104.3 inches

Curb Weight Base Model:

Approximately 2,800 - 3,000 lbs

Curb Weight Gsx Model:

Approximately 3,100 - 3,300 lbs

Gross Vehicle Weight Rating Gvwr:

Varies by model, typically around 4,200-4,500 lbs.

Seating Capacity:

5-passenger

🛡️ Safety Features

NHTSA Crash Test Results:

Limited public data available for this specific model year from NHTSA. Vehicles of this era generally had lower safety standards than modern vehicles.

Active Safety Features:

Anti-lock Braking System (ABS) available on higher trims (e.g., GSX).

Passive Safety Features:

Driver and front passenger airbags (optional or standard depending on trim), three-point seat belts, collapsible steering column.

Seatbelt Pretensioners:

Front seatbelts with pretensioners.

Child Seat Anchors:

LATCH system not standard on 1991 models; traditional seatbelt installation is the method.

💡 Technology Features

Infotainment System:

Factory fitted AM/FM stereo cassette player with optional CD player. Analog climate controls.

Driver Assistance Features:

Limited by modern standards. Primarily focused on mechanical systems. ABS was an option on higher trims.

Connectivity Features:

N/A (No integrated Bluetooth or USB connectivity)

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 miles or 3-6 months, depending on driving conditions (consult manual for specific recommendations).

Engine Oil Type:

API SG or SH, SAE 5W-30 or 10W-30 (refer to owner's manual for specific viscosity based on temperature).

Timing Belt Replacement:

Typically every 60,000 miles or 5 years for the 4G63 engine. Critical maintenance item.

Transmission Fluid Change Interval:

Automatic: Every 30,000-60,000 miles. Manual: Check for leaks, fluid replacement typically at higher mileage or if contamination is suspected.

Coolant Type:

Ethylene glycol-based antifreeze (50/50 mix with distilled water). Consult manual for specific coolant type/color.

Brake Fluid Type:

DOT 3 or DOT 4.

Power Steering Fluid:

Dexron II or equivalent.

Transfer Case Fluid AWD:

API GL-4 or GL-5 Gear Oil (consult specific manual for Mitsubishi recommended type).

Differential Fluid AWD:

API GL-5 Gear Oil (check manual for front/rear specific recommendations).

Known Issues:

Drive belt tensioner pulley bearing failure, power window motor failure, AC compressor clutch failure, dashboard cracking/deterioration due to UV exposure.

Maintenance Part Numbers:

Oil Filter: MD345571 (or equivalent like Fram PH3593A, Wix 51516). Air Filter: MD618438 (or equivalent like Fram CA3229, Wix 42034). Spark Plugs: NGK BPR6ES or equivalent.

📚 Vehicle History

Brand Heritage:

Mitsubishi Motors has a long history in automotive manufacturing, known for its diverse product lines and engineering prowess, including rally racing heritage and innovative technologies.

Model Evolution:

The 1991 Galant (eighth generation) marked a significant redesign, moving away from its previous angular styling to a more aerodynamic and modern appearance. It introduced advanced features like all-wheel drive and four-wheel steering (on some markets/trims not necessarily US '91) to the Galant line.

Production Years:

1987-1993 (E30 series for this generation)

Manufacturing Location:

Japan

Trim Levels Common Usdm:

LS (base), GS, GSX (performance flagship).

🏆 Awards & Recognition

Recognitions:

The 1991 Galant received positive reviews for its handling and performance, particularly the GSX model, often cited for its value and sporty credentials.

Ratings:

Considered a strong performer in its class, especially with the turbo AWD variant, often lauded by automotive journalists for its engineering.

Certifications:

N/A