From 1991 to 2000, the company produced the Isuzu 4JG2 3.1-liter diesel engine, which was fitted in numerous SUVs, including the Trooper and the comparable Opel Monterey. The most potent models had an intercooler, while atmospheric, turbocharged models were available.
Diesels 4JB1, 4JX1, 4JG2, 4JJ1, and 4JJ3 are also part of the J-engine line.
Specifications
| Production years | 1991-2000 |
| Displacement, cc | 3059 |
| Fuel system | prechambers |
| Power output, hp | 95 – 115 115 – 135 (4JG2T or 4JG2-TC) |
| Torque output, Nm | 185 – 205 270 – 295 (4JG2T or 4JG2-TC) |
| Cylinder block | cast iron R4 |
| Block head | cast iron 8v |
| Cylinder bore, mm | 95.4 |
| Piston stroke, mm | 107 |
| Compression ratio | 20.1 20.0 (4JG2T or 4JG2-TC) |
| Features | OHV OHV / intercooler (4JG2T or 4JG2-TC) |
| Hydraulic lifters | no |
| Timing drive | gears belt (4JG2T or 4JG2-TC) |
| Phase regulator | no |
| Turbocharging | no IHI RHB5 (4JG2T or 4JG2-TC) |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | diesel |
| Euro standards | EURO 1 EURO 2 (4JG2T or 4JG2-TC) |
| Fuel consumption, L/100 km (for Isuzu Trooper 1994) — city — highway — combined |
12.1 8.0 9.7 |
| Engine lifespan, km | ~450 000 |
| Weight, kg | 260 |
The engine was installed on:
- Isuzu Faster 3 (TF) in 1993 – 1998;
- Isuzu MU 1 (UC) in 1993 – 1998;
- Isuzu Trooper 2 (UB2) in 1991 – 2000;
- Isuzu Wizard 1 (UC) in 1992 – 1998;
- Opel Monterey A (M92) in 1992 – 1999;
- Honda Horizon 1 in 1994 – 1998.
Disadvantages of the Isuzu 4JG2 engine
With a wealth of resources, this is one of the most dependable and modest Isuzu diesel engines.
Cylinder head cracking with exhaust gas breakthrough is the most well-known engine issue.
Although the timing belt has a very long lifespan, it poses a serious risk to the power unit if it breaks.
Finding experts to fix and modify ZEXEL fuel equipment is challenging.
Every 40,000 kilometers, the manual advises changing the valve clearances.