🏷️ Basic Information

Make:

Isuzu

Model:

Geminett II

Model Code:

MGM / NGM

Production Years Covered:

1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994

Chassis Code Range:

MGM / NGM Series

👋 Introduction

Segment:

Compact van/minitruck (commercial and passenger variants)

Target Audience:

Small businesses, tradespeople, fleet operators, and families

Key Competitors:

Mitsubishi Delica, Toyota Liteace/Townace, Nissan Vanette

Versatility:

Available in cargo van, passenger van, and pickup truck configurations

Durability:

Known for Isuzu's robust engineering and reliable powertrain options

Value Proposition:

Offered a practical and affordable solution for utility and transport needs

📋 Manual Details

Global Regions:

Primarily Asia-Pacific (Japan, Australia, Southeast Asia)

Specific Markets:

Japan, Australia, New Zealand, other Asian markets

Estimated Page Count:

Over 1500 pages (typical for comprehensive workshop manuals of this era)

Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable Digital File (PDF)

📖 Manual Coverage

Engine:

Engine mechanical, lubrication, cooling, fuel, ignition, emission control, engine electrical systems

Transmission:

Manual and automatic transmission overhaul, operation, diagnosis, and repair

Drivetrain:

Clutch, driveshafts, differentials, axles, and wheel hubs

Suspension:

Front and rear suspension systems, steering components, wheel alignment

Brakes:

Hydraulic system, brake calipers, rotors, drums, parking brake, ABS (if equipped)

Electrical:

Wiring diagrams, lighting, instrumentation, power distribution, charging system, starting system

Body:

Body panel repair, doors, windows, interior trim, seats, exterior trim

HVAC:

Heating, ventilation, and air conditioning system diagnosis and repair

Chassis:

Frame and chassis component inspection and repair

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, lubrication points

Troubleshooting:

Diagnostic procedures, symptom-based troubleshooting charts, fault code interpretation

Repair:

Step-by-step repair instructions for all major components and systems

Overhaul:

Complete disassembly and reassembly procedures for engines, transmissions, and differentials

Installation:

Instructions for component replacement and installation

Specifications:

Torque specifications, clearances, measurements, and tolerances for all components

Depth:

Comprehensive: Covers everything from basic maintenance to full engine and transmission rebuilds, including detailed electrical schematics and troubleshooting guides.

📊 Manual Specifications

File Type:

PDF

Searchability:

Text-searchable (assuming OCR applied to original scans)

Resolution:

High-resolution (typical for factory manuals, ensuring clarity of diagrams)

Binding:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Code Common:

G161 / G200 (Gasoline), 4EC1 (Diesel)

Displacement Petrol 1:

1.6 Liters (1584 cc)

Displacement Petrol 2:

2.0 Liters (1951 cc)

Displacement Diesel:

1.8 Liters (1817 cc)

Horsepower Approx:

70-80 HP

Torque Approx:

120-130 Nm

Horsepower Approx:

90-100 HP

Torque Approx:

150-160 Nm

Horsepower Approx:

55-60 HP

Torque Approx:

110-120 Nm

Fuel Delivery Petrol:

Carbureted (single or dual barrel) or Fuel Injection (later models)

Fuel Delivery Diesel:

Indirect injection with rotary or inline injection pump

Ignition Type:

Distributor-based electronic ignition

Cooling Type:

Liquid-cooled

🔧 Transmission

Type 1:

4-speed Manual

Type 2:

3-speed Automatic (common on passenger variants)

Drivetrain Layout:

Rear-wheel drive (RWD) standard, some variants may have offered 4-wheel drive (4WD)

Manual Fluid:

API GL-4 Gear Oil (e.g., SAE 75W-90 or 80W-90)

Automatic Fluid:

Dexron II or equivalent

📐 Dimensions

Body Styles:

Panel Van, Window Van, Pickup Truck, Chassis Cab

Wheelbase Approx:

2400-2700 mm (varies by configuration)

Length Approx:

4000-4600 mm (varies by configuration)

Curb Weight Approx:

1000-1300 kg (varies by configuration and powertrain)

Gross Vehicle Weight Rating Approx:

1800-2200 kg

🛡️ Safety Features

Safety Standards:

Reflects contemporary safety standards of the 1980s and early 1990s; likely minimal electronic safety aids.

Active Safety:

Standard hydraulic braking system; optional ABS on some higher trims in later years (less common).

Passive Safety:

Seat belts, reinforced cabin structure (basic).

💡 Technology Features

Audio System:

Basic AM/FM radio and cassette player

Display:

Analog gauges for speedometer, tachometer (optional), fuel, temperature; warning lights

Driver Aids:

Minimal; focus on essential controls. Power steering available on some variants.

Connectivity Features:

N/A (pre-dates modern connectivity standards)

🔧 Maintenance

Oil Change Interval:

Every 5,000-7,500 km or 6 months (typical for the era)

Air Filter Replacement Interval:

Every 15,000-20,000 km

Spark Plug Replacement Interval Petrol:

Every 20,000-30,000 km

Timing Belt Replacement Interval Petrol:

Every 60,000-80,000 km (critical to follow for interference engines)

Engine Oil Type:

API SF/SG or equivalent, SAE 10W-30 or 10W-40 (check manual for specific viscosity and API rating based on climate)

Coolant Type:

Ethylene glycol based antifreeze coolant (typically a green type)

Brake Fluid Type:

DOT 3 or DOT 4

Common Wear Items:

Ignition components (spark plugs, wires, distributor cap/rotor), clutch wear, exhaust system corrosion, suspension bushings

Diesel Specific:

Glow plug reliability, injector pump calibration, carbon buildup

Rust Prone Areas:

Wheel arches, rocker panels, chassis frame (depending on climate and care)

📚 Vehicle History

Isuzu Legacy:

Isuzu has a long history of producing robust trucks, commercial vehicles, and reliable diesel engines.

Geminett Lineage:

The Geminett II is a successor to earlier Isuzu compact commercial vehicles, evolving from the previous Gemini-based van/truck platforms.

Manufacturing Locations:

Primarily Japan

Market Success:

Popular in its target markets for its practicality, fuel efficiency (especially diesel), and durability.

🏆 Awards & Recognition

Industry Acclaim:

While specific awards for the Geminett II are not widely documented, Isuzu vehicles of this era were generally recognized for their robust build quality and reliability in commercial applications.

Consumer Reports Era:

Likely received positive ratings for durability and value for money in consumer and trade publications of its time.