Only the well-liked Grand Cherokee WJ SUV was equipped with the 3.1-liter, five-cylinder Jeep EXA diesel engine from 1999 to 2001 before it was restyled. The Italian company VM Motori created this type of diesel engine, which is also referred to as 531 OHV.
ENC, ENJ, ENS, ENR, EXF, EXJ, EXN, and EXA are all part of the VM Motori series.
Specifications
| Production years | 1999-2001 |
| Displacement, cc | 3125 |
| Fuel system | prechamber |
| Power output, hp | 140 |
| Torque output, Nm | 385 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 10v |
| Cylinder bore, mm | 92 |
| Piston stroke, mm | 94 |
| Compression ratio | 21 |
| Features | OHV |
| Hydraulic lifters | yes |
| Timing drive | gears |
| Phase regulator | no |
| Turbocharging | MHI TF035 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.8 |
| Fuel type | diesel |
| Euro standards | EURO 1 |
| Fuel consumption, L/100 km (for Jeep Grand Cherokee 2000) — city — highway — combined |
14.5 8.7 10.8 |
| Engine lifespan, km | ~300 000 |
The engine was installed on:
- Jeep Grand Cherokee 2 (WJ) in 1999 – 2001.
Disadvantages of the EXA engine
First of all, this diesel engine is extremely uncommon; it was only installed on the Grand Cherokee for three years. Secondly, each cylinder in this engine has its own head, which frequently cracks.
Thirdly, these heads must be stretched on a regular basis to prevent oil leaks; the turbine is characterized by a low resource and frequently drives oil up to 100,000 kilometers; many owners also complain about vibration and loud noise.