This service and repair manual covers the Mitsubishi 4D56 engine, an inline-4 diesel engine produced in 1994. This robust engine, displacing 2.5 liters (2477 cc), features indirect injection and a water-cooled system, delivering between 83-97 HP and 145-160 lb-ft of torque depending on the specific variant. Known for its reliability and durability, the 4D56 engine has been a popular choice for a variety of vehicles, including the Mitsubishi Pajero/Montero, L200/Triton, Delica, and Strada, as well as the Hyundai Grace and H100, and Kia Bongo. Its engineering is designed for demanding applications, making it a workhorse in its class. This manual provides comprehensive guidance for maintaining and repairing the Mitsubishi 4D56 engine. It details essential maintenance procedures, including recommended oil types, capacities, and change intervals, as well as replacement schedules for critical components like fuel and timing belts. Technical specifications, such as bore, stroke, and compression ratio, are included to aid in diagnostics and repairs. Furthermore, this guide offers troubleshooting advice and safety guidelines, ensuring that owners, mechanics, and technicians have the necessary information to keep the engine operating at peak performance and longevity.