🏷️ Basic Information

Make:

Isuzu

Model:

Trooper

Year:

1989

Generation:

Second Generation (UB)

Body Style:

SUV (Sport Utility Vehicle), available in 2-door and 4-door configurations.

Chassis Code:

UB

👋 Introduction

Market Segment:

Compact/Mid-size SUV, off-road capable, utility vehicle.

Competitors 1989:

Jeep Cherokee (XJ), Toyota 4Runner, Nissan Pathfinder, Mitsubishi Montero.

Usp Trooper 1989:

Rugged body-on-frame construction, reliable engines, excellent off-road capability, practical interior space, durable reputation.

📋 Manual Details

Primary Coverage:

Full Service, Repair, Maintenance, Rebuild, Refurbish, Restoration

Estimated Page Count:

800+

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

Digital (likely PDF, often printable)

📖 Manual Coverage

Engine:

Engine mechanical (including overhaul, tuning), fuel system (EFI), ignition system, cooling system, lubrication system, exhaust system.

Transmission:

Manual transmission, automatic transmission (including overhaul, diagnostics, fluid specifications).

Drivetrain:

Four-wheel drive system (transfer case, front/rear axles, differentials, CV joints), driveshafts.

Brakes:

Hydraulic system, front disc brakes, rear drum brakes (or optional rear discs for some trims), parking brake, ABS (if equipped).

Steering:

Power steering system (pump, hoses, gearbox/rack), steering column, tie rods, ball joints.

Suspension:

Front independent suspension (torsion bar, control arms, ball joints, shocks), rear solid axle suspension (leaf springs, shocks, bushings), sway bars.

Electrical:

12V electrical system, battery, alternator, starter motor, lighting (headlights, taillights, interior), fuses, relays, wiring diagrams, dashboard instrumentation, power windows, power locks, wipers, horn.

Body And Chassis:

Frame construction, body panels, doors, hood, tailgate, bumpers, glass, interior trim, seats, HVAC system (heater, A/C), sound deadening.

Bodywork:

Body panel repair, rust prevention and repair, door mechanisms, window regulators, tailgate and associated hardware.

HVAC:

Heater core service, air conditioning system (refrigerant handling procedures may be limited due to older regulations, but diagnostics and component replacement covered), blower motor, ducting.

Wheels And Tires:

Tire pressure specifications, wheel bolt patterns, wheel bearing service, tire replacement procedures.

Lighting System:

Headlight aiming, bulb replacement, wiring for all interior and exterior lights.

Maintenance:

Scheduled maintenance (oil changes, filter replacements, fluid checks), tune-ups, lubrication points, belt adjustments, brake pad replacement, tire rotation.

Troubleshooting:

Diagnostic procedures for common problems, symptom-based troubleshooting guides, electrical system diagnostics with wiring diagrams.

Repair:

Detailed step-by-step repair instructions for all major components and systems, including engine rebuild, transmission overhaul, suspension component replacement, brake caliper repair, fuel injector replacement.

Installation:

Procedures for installing optional equipment or replacement parts (e.g., trailer hitch, auxiliary lighting).

Emissions Controls:

Diagnosis and repair of emission control systems, including EGR valve, catalytic converter, oxygen sensors.

Interior Systems:

Removal and installation of interior trim panels, seats, dashboard components, steering wheel, and center console.

Exterior Trim:

Removal and installation of exterior moldings, bumpers, grilles, and emblems.

Diagnostics:

Fault code reading and interpretation (if applicable), testing of sensors and actuators, circuit testing using multimeter.

Depth Of Coverage:

Comprehensive, suitable for professional mechanics and dedicated DIY enthusiasts. Covers everything from basic fluid checks to full engine and transmission rebuilds.

Diagnostic Tools:

Includes procedures for using basic diagnostic tools and understanding OBD-I (if applicable to specific 1989 emissions systems).

Torque Specifications:

Extensive torque specifications for all critical fasteners throughout the vehicle.

📊 Manual Specifications

File Format:

Digital PDF

Print Quality:

High-resolution scans with clear text and diagrams.

Binding Type:

N/A (Digital)

Paper Type:

N/A (Digital)

Manual Completeness:

Highly detailed, designed for comprehensive repair and maintenance.

⚙️ Engine Specifications

Engine Code 1:

4ZE1

Engine Type 1:

2.6L SOHC 4-cylinder gasoline

Displacement Cc 1:

2600

Bore Stroke Mm 1:

95.0 x 92.0

Compression Ratio 1:

8.3:1

Horsepower Hp 1:

110 (approx. @ 4800 rpm)

Torque Lb Ft 1:

146 (approx. @ 2600 rpm)

Valve Train 1:

SOHC (Single Overhead Camshaft)

Fuel Delivery 1:

Multi-point Fuel Injection

Ignition System Type:

Electronic Ignition System (Distributorless Ignition System - DIS on some later models, but likely distributor-based for 1989).

Fuel System Type:

Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline (87 octane recommended)

Available Diesel Engine:

Yes, 2.8L 4JB1 Turbo-Diesel (check specific market availability for 1989 models)

🔧 Transmission

Standard Transmission:

5-speed Manual Transmission

Optional Transmission:

4-speed Automatic Transmission

Transfer Case Type:

2-speed manual or automatic (depending on trim) part-time four-wheel-drive system

Gear Ratios Manual:

Detailed ratios for 5-speed manual transmission provided.

Gear Ratios Automatic:

Detailed ratios for 4-speed automatic transmission provided.

📐 Dimensions

Wheelbase In:

104.7

Length In:

173.4

Width In:

66.5

Height In:

63.8

Approach Angle Degrees:

Approx. 40 (depending on tire size)

Departure Angle Degrees:

Approx. 28 (depending on tire size)

Breakover Angle Degrees:

Approx. 120 (depending on tire size)

Curb Weight Lbs:

3700-4200 (approx., depending on configuration)

Gross Vehicle Weight Rating Gvwr Lbs:

5000-5500 (approx.)

Towing Capacity Lbs:

Up to 3500 (check specific configuration and local regulations)

Cargo Volume Cu Ft:

Significant, expandable with rear seats folded.

🛡️ Safety Features

NHTSA Rating 1989:

Not available for this year/model in standard format.

Active Safety Features:

Four-wheel drive system enhances traction, Anti-lock Braking System (ABS) available on some trims.

Passive Safety Features:

Seat belts (lap and shoulder front, lap rear), reinforced body structure, energy-absorbing steering column.

💡 Technology Features

Infotainment 1989:

Basic AM/FM radio with cassette player. Optional premium sound system.

Driver Assistance 1989:

Limited; primarily mechanical features. ABS available on select trims.

Connectivity 1989:

None (no Bluetooth, USB, etc.)

🔧 Maintenance

Oil Change Interval Miles:

3,000 - 5,000 miles (check manual for specific conditions)

Transmission Fluid Change Miles:

30,000 - 50,000 miles (for automatic and manual)

Coolant Change Interval Miles:

30,000 - 60,000 miles

Engine Oil Type Viscosity:

API SG or SH, SAE 10W-30 or 10W-40 recommended (check manual)

Automatic Transmission Fluid Type:

Dexron II (or equivalent)

Manual Transmission Fluid Type:

API GL-4 SAE 75W-90 or 80W-90 gear oil

Coolant Type:

Ethylene Glycol based, 50/50 mix with distilled water

Brake Fluid Type:

DOT 3

Power Steering Fluid Type:

ATF Dexron II (or equivalent)

Differential Fluid Front Rear:

API GL-5 SAE 80W-90 hypoid gear oil

Transfer Case Fluid Type:

API GL-4 SAE 75W-90 or 80W-90 gear oil

Common Wear Items:

Ball joints, tie rod ends, sway bar bushings, rear main seal leaks, clutch wear (manual), timing chain stretch (over high mileage), rust on body panels and frame (especially in certain climates).

Engine Issues:

Head gasket issues can occur, especially with overheating. Carburetor issues on older non-EFI models, but this 1989 model should have EFI. Ignition system component wear.

Transmission Issues:

Manual clutch wear, automatic transmission clutch pack wear and solenoid issues.

Electrical Gremlins:

Aging wiring harnesses and connectors can lead to intermittent electrical issues. Ground point corrosion is common.

📚 Vehicle History

Isuzu Legacy:

Isuzu has a long history in commercial vehicles and trucks, known for durability and ruggedness, which translated into their early SUV offerings.

Trooper Generations:

First generation (1981-1989), Second generation (1990-2002). The 1989 model is the final year of the first generation.

First Generation Features:

Body-on-frame construction, solid front and rear axles, leaf spring rear suspension, available with short-wheelbase (2-door) and long-wheelbase (4-door) configurations.

Manufacturing Location:

Japan (Fuji Heavy Industries for initial assembly, then Isuzu's own plants)

🏆 Awards & Recognition

Notable Awards Trooper:

While specific awards for the 1989 model year are not widely publicized, the Isuzu Trooper consistently received praise for its off-road prowess and utility from automotive journalists and off-road publications throughout its first generation.