This manual covers the Mitsubishi 4D56 engine, a robust 2.8-liter (2835cc) diesel power plant known for its reliability and versatility across various applications. Available in naturally aspirated and turbocharged configurations, this 4-cylinder, 2-valve per cylinder engine offers a balance of performance and efficiency, with power outputs ranging from approximately 80-90 hp for naturally aspirated models to 90-125 hp for turbocharged variants. Its solid engineering and durable construction make it a dependable choice for a wide range of vehicles. This comprehensive Service Repair Workshop Manual, provided in English, details essential maintenance procedures, technical specifications, and troubleshooting guidance for the Mitsubishi 4D56 engine. It covers critical areas such as lubrication requirements, filter types, cooling system maintenance, fuel system specifics, and timing belt replacement intervals. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance, longevity, and proper repair of their 4D56 engine.