This workshop service repair manual covers the Mitsubishi 4D68 engine family, an inline-4 diesel engine with a displacement of 2.0 L (1998 cc). Featuring indirect injection, an aluminum alloy cylinder head, and a cast iron engine block, this engine is known for its robust construction and reliability. It utilizes a timing belt for its valvetrain and is water-cooled. This engine has been commonly found in various Mitsubishi models, including the Pajero, Space Wagon, Lancer, and Galant, offering dependable performance for diverse applications. This comprehensive English-language manual provides detailed information essential for the maintenance and repair of the Mitsubishi 4D68 engine. It covers critical procedures such as lubrication, fluid types, and service intervals, including guidance on timing belt replacement. Technical specifications, troubleshooting advice, and diagnostic procedures are also included to assist owners, mechanics, and technicians. The objective is to ensure optimal performance, longevity, and safe operation of the vehicle equipped with this engine.