Segment:
Mid-size SUV, known for its off-road capability and durability
Competitors:
Toyota Land Cruiser Prado, Mitsubishi Pajero/Montero, Nissan Patrol, Land Rover Discovery
Vehicle Appeal:
Rugged construction, reliable powertrains, go-anywhere capability, spacious interior, available in various configurations (short-wheelbase, long-wheelbase, different seating arrangements)
Benefit To Owner:
Empowers owners to perform DIY servicing and repairs, saving money on labor costs and enabling better understanding and maintenance of their vehicle.
Powertrain:
Engine, Fuel System, Emission Control, Cooling System, Lubrication System, Intake and Exhaust Systems, Clutch, Manual Transmission, Automatic Transmission, Transfer Case, Driveshaft, Differential
Chassis:
Suspension (Front and Rear), Steering System, Brake System (including ABS), Wheels and Tires
Electrical:
Full Electrical System, Wiring Diagrams, Engine Control Systems, Lighting, Instrumentation, Ignition System, SRS (Supplemental Restraint System)
Body And Interior:
Body Panels, Doors, Windows, Seats, HVAC System (Heating, Ventilation, and Air Conditioning), Climate Control Systems, Interior Trim
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-ups, spark plug replacement, belt inspections, general lubrication
Tune Up:
Ignition timing, fuel system adjustments, emission control system checks, idle speed adjustments
Repair And Rebuild:
Engine internal component repair/rebuild (cylinder head, valve train, engine block), transmission overhaul, brake system repair, suspension component replacement, steering component repair, HVAC system repair, electrical component troubleshooting and replacement
Diagnostics:
Troubleshooting guides for common and complex issues, diagnostic procedures for mechanical and electrical systems
Removal And Installation:
Comprehensive instructions for removing and installing all major components and sub-assemblies
Depth:
Advanced, covering complete overhaul and rebuilding of all major mechanical and electrical systems. Includes detailed diagrams, torque specifications, timing procedures, and special tool requirements.
Engine Code:
4JX1 (Common for 1998-2002 models, though others may exist)
Engine Type:
3.0L Inline 4-cylinder Turbocharged Diesel (Commonly found in this generation)
Displacement:
2999 cc (3.0 Liters)
Bore X Stroke:
95.4 mm x 104.9 mm (Typical for 4JX1)
Compression Ratio:
18.5:1 (Typical for 4JX1)
Fuel System:
Common Rail Direct Injection (CRDI) with Electronic Fuel Injection (EFI)
Horsepower Kw:
~157-159 hp (approx. 117-119 kW) @ 3600 rpm (for 4JX1)
Torque Nm:
~333-350 Nm @ 1800 rpm (for 4JX1)
Gasoline Options:
3.2L 6VD1 V6 Gasoline and 3.5L 6VE1 V6 Gasoline engines were also available in this generation
Gasoline Displacement:
3165 cc (3.2L) and 3494 cc (3.5L)
Engine Control Unit:
ECU controlled fuel injection and engine management
Type:
5-speed Manual Transmission (MUA5)
Type:
4-speed Automatic Transmission (4L30-E)
Type:
Part-time 4WD system with Electronic Hi-Lo selection (often referred to as 'Shift-on-the-Fly' capability, depending on region and specific model)
Manual Gearbox Fluid:
API GL-4, SAE 75W-90 or SAE 80W-90 (Consult manual for exact spec)
Automatic Gearbox Fluid:
Dexron III or equivalent (Consult manual for exact spec)
Long Wheelbase:
Approx. 4,685 mm (L) x 1,820 mm (W) x 1,800 mm (H) (Varies slightly by model/year)
Short Wheelbase:
Approx. 4,255 mm (L) x 1,820 mm (W) x 1,780 mm (H) (Varies slightly by model/year)
Long Wheelbase:
Approx. 2,745 mm
Short Wheelbase:
Approx. 2,375 mm
Curb Weight:
Approx. 1,700 - 2,000 kg (depending on configuration and engine)
Gross Vehicle Weight Rating:
Approx. 2,400 - 2,600 kg
Towing Capacity:
Up to 2,500 kg (braked, check local regulations/specific model)
Common Fitment:
245/70R16, 265/70R16 (Consult manual for exact specifications per model)
Pattern:
6x139.7 mm (often called 6x5.5 inches)
Crash Test Results:
Variable depending on region and testing agency. Early models may not have comprehensive modern ratings.
Airbags:
Driver and front passenger airbags (standard on facelifted models)
Seatbelts:
3-point front and rear seatbelts, pre-tensioners for front belts
Body Construction:
Body-on-frame construction for durability and off-road robustness
ABS:
Anti-lock Braking System (ABS) available on higher trims or as an option
Traction Control:
Traction control systems (TCS) may be present on some models
Audio System:
Factory fitted radio/cassette player or CD player, often with 4-6 speaker system. Upgrades common.
Navigation:
Rarely factory fitted; typically an aftermarket addition.
Cruise Control:
Available on higher trim levels or as an option.
Phone Integration:
Not integrated; typically via aftermarket Bluetooth kits or cradles.
Oil Change:
Every 5,000-10,000 km or 6-12 months, depending on driving conditions and oil type (consult manual for specific recommendations).
Air Filter Replacement:
Every 15,000-30,000 km or annually.
Fuel Filter Replacement:
Diesel: Every 20,000-40,000 km. Gasoline: Refer to manual.
Spark Plug Replacement:
Gasoline engines: Every 40,000-100,000 km depending on plug type (standard, platinum, iridium).
Timing Belt Replacement:
For engines with timing belts (e.g., some V6 gasoline variants), typically every 90,000-150,000 km or 5-7 years. The 4JX1 diesel uses a timing chain.
Engine Oil Capacity:
Approx. 6.0 - 7.0 liters for 4JX1 diesel (including filter). V6 gasoline engines may vary.
Engine Oil Grade:
Diesel: API CI-4 or CJ-4, SAE 5W-30 or 10W-30 synthetic/semi-synthetic recommended for 4JX1. Gasoline: API SN/SP, SAE 5W-30 or 10W-30/40 depending on engine and climate.
Coolant Type:
Ethylene glycol based coolant, typically green or long-life orange/pink. Capacity approx. 8-10 liters.
Brake Fluid:
DOT 3 or DOT 4 (Consult manual for specific type and minimum wet boiling point). Capacity approx. 1-1.5 liters.
Common Problems:
Automatic transmission shift quality issues (4L30-E), potential for ABS sensor failures.
Manufacturer:
Isuzu Motors Ltd., Japan. Renowned for its expertise in diesel engines and commercial vehicles.
First Generation:
Launched in the 1980s, establishing Isuzu's presence in the SUV market.
Second Generation Ub Ucs:
Introduced in 1991, significant redesign with improved styling, comfort, and technology. The 1998 facelift brought updated styling, new engine options (including the advanced 4JX1 diesel), and enhanced safety features.
Manufacturing Locations:
Primarily Japan. Also produced or assembled in various other countries under license or as part of global manufacturing networks.
Discontinuation:
Production of the Trooper ceased globally in 2002. Holden Jackaroo also followed suit.
Off Road Capability:
Widely recognized for its off-road prowess and durability, often a popular choice for overland expeditions and serious off-roading communities.
Diesel Engine Technology:
The 4JX1 engine, with its common rail direct injection, was considered advanced for its time, offering good power and efficiency for an SUV of its era.
