The Japanese company assembled the 3.0-liter Isuzu 4JX1 diesel engine from 1998 to 2004 and installed it on many of its models, such as the Wizard, Trooper or the similar Opel Monterey. This 16-valve DOHC engine was fundamentally different from its OHV predecessors.
The J-engine line also includes diesels: 4JB1, 4JX1, 4JG2, 4JJ1, 4JJ3.
Specifications
| Production years | 1998-2004 |
| Displacement, cc | 2999 |
| Fuel system | HEUI |
| Power output, hp | 145 – 160 |
| Torque output, Nm | 295 – 335 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 95.4 |
| Piston stroke, mm | 104.9 |
| Compression ratio | 19.0 |
| Features | DOHC, intercooler |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | IHI RHF5 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.5 |
| Fuel type | diesel |
| Euro standards | EURO 2/3 |
| Fuel consumption, L/100 km (for Isuzu Trooper 2000) — city — highway — combined |
13.6 8.7 10.1 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 280 |
The engine was installed on:
- Isuzu MU 2 (UE) in 1998 – 2004;
- Isuzu Rodeo 2 (UE) in 1998 – 2002;
- Isuzu Trooper 2 (UB2) in 1998 – 2002;
- Isuzu Wizard 2 (UE) in 1998 – 2004;
- Opel Monterey A (M92) in 1998 – 1999;
- Honda Horizon 1 in 1998 – 1999.
Disadvantages of the Isuzu 4JX1 engine
- This is one of the most problematic Isuzu diesels.
- Most of its breakdowns are related to the vagaries of the unusual HEUI fuel system.
- There are especially many complaints about the ingress of diesel fuel into the oil through nozzle seals.
- Monitor the condition of the timing belt, if it breaks at high speed, the valves bend.
- There are no hydraulic lifters here and periodically you need to adjust the valve clearances.