The 3.0-liter Isuzu 4JJ1 diesel engine has been assembled at the Japanese plant since 2004 and is installed on the popular D-Max pickup truck or the MU-X off-road vehicle. There are OHV engine versions: 4JJ1-T, 4JJ1-X, 4JJ1-TCN, 4JJ1-TCS for commercial vehicles.
The J-engine line also includes diesels: 4JB1, 4JX1, 4JG2, 4JJ1, 4JJ3.
Specifications
| Production years | since 2004 |
| Displacement, cc | 2999 |
| Fuel system | Common Rail |
| Power output, hp | 146 (4JJ1-TC) 163 – 177 (4JJ1-TCX) 177 (4JJ1-TC HI) |
| Torque output, Nm | 294 (4JJ1-TC) 360 – 380 (4JJ1-TCX) 430 (4JJ1-TC HI) |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 95.4 |
| Piston stroke, mm | 104.9 |
| Compression ratio | 17.5 (4JJ1-TC) 17.3 – 17.5 (4JJ1-TCX) 16.5 (4JJ1-TC HI) |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain and gears |
| Phase regulator | no |
| Turbocharging | IHI RHV4 (4JJ1-TC) IHI RHV5 (4JJ1-TCX) IHI RHV5 (4JJ1-TC HI) |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.0 |
| Fuel type | diesel |
| Euro standards | EURO 2/3 (4JJ1-TC) EURO 3/4 (4JJ1-TCX) EURO 5 (4JJ1-TC HI) |
| Fuel consumption, L/100 km (for Isuzu D-Max 2018) — city — highway — combined |
9.6 7.4 8.3 |
| Engine lifespan, km | ~500 000 |
| Weight, kg | 322 |
The engine was installed on:
- Isuzu D-Max 1 (RA) in 2002 – 2012; D-Max 2 (RT) since 2011;
- Isuzu MU-7 1 (510) in 2004 – 2013;
- Isuzu MU-X 1 (RF) in 2013 – 2021.
Disadvantages of the Isuzu 4JJ1 engine
- This is a strong and resourceful diesel engine, but quite noisy, as well as vibration-loaded.
- The Denso fuel system is quite reliable, but demanding on the quality of diesel fuel.
- The timing chain runs for a long time, but its hydraulic tensioner can already give up by 200,000 km.
- Many problems of this power unit are solved after cleaning the EGR valve.
- Periodically, you need to adjust the valves, since there are no hydraulic lifters here.
