The 2.8-liter Isuzu 4JB1 diesel engine was assembled at a factory in Japan from 1988 to 1998 and installed on such popular concern models as the Trooper, Wizard or Faster pickup truck. Now the production of clones of this unit has been mastered by numerous Chinese companies.
The J-engine line also includes diesels: 4JB1, 4JX1, 4JG2, 4JJ1, 4JJ3.
Specifications
| Production years | 1988-1998 |
| Displacement, cc | 2771 |
| Fuel system | direct injection |
| Power output, hp | 87 – 90 95 – 115 (4JB1T or 4JB1-TC) |
| Torque output, Nm | 180 – 185 220 – 235 (4JB1T or 4JB1-TC) |
| Cylinder block | cast iron R4 |
| Block head | cast iron 8v |
| Cylinder bore, mm | 93 |
| Piston stroke, mm | 102 |
| Compression ratio | 18.2 18.1 (4JB1T or 4JB1-TC) |
| Features | OHV OHV, intercooler (4JB1T or 4JB1-TC) |
| Hydraulic lifters | yes no (4JB1T or 4JB1-TC) |
| Timing drive | gears belt (4JB1T or 4JB1-TC) |
| Phase regulator | no |
| Turbocharging | no IHI RHB5 or RHF4 (4JB1T or 4JB1-TC) |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 4.2 |
| Fuel type | diesel |
| Euro standards | EURO 1 EURO 2/3 (4JB1T or 4JB1-TC) |
| Fuel consumption, L/100 km (for Isuzu MU 1994) — city — highway — combined |
10.1 7.0 8.7 |
| Engine lifespan, km | ~450 000 |
| Weight, kg | 240 |
The engine was installed on:
- Isuzu Faster 3 (TF) in 1992 – 1998;
- Isuzu MU 1 (UC) in 1989 – 1998;
- Isuzu Trooper 1 (UB1) in 1988 – 1991;
- Isuzu Wizard 1 (UC) in 1992 – 1998;
- Opel Frontera A (U92) in 1995 – 1996.
Disadvantages of the Isuzu 4JB1 engine
- These are very reliable diesel engines, analogues of which are often used in industry;
- Zexel fuel equipment runs for a long time, but there are problems with its spare parts;
- Monitor the condition of the timing belt, or if it breaks, at least the rods will bend;
- Sometimes it cuts off the gears of the oil pump and breaks the keyway on the crankshaft;
- According to the regulations, the thermal clearances of the valves must be adjusted every 40,000 km.
Very good information! in contrast to the 4JA1, what are its differences with the 4JB1? and some of its variants, if I could obtain that information I would be very grateful
Engines differ in volume and piston stroke, so I think the cylinder block may be lower.
Very informative.
How good are the Chinese mfg 4JB1 engine?
I recently got one in a standby generator. It starts right up and runs excellent so far. Just would love your opinion on this engine.
Thanks, Ray