This workshop service repair manual covers the Volvo TWD1620GE, a powerful diesel engine designed for demanding applications. Featuring a 16.1-liter displacement and direct injection, this water-cooled engine delivers up to 500 kW (670 hp) from its 6-cylinder configuration. Its robust construction and engineering quality ensure reliability in continuous operation. The engine's specifications include a bore and stroke of 170 mm, a substantial oil capacity of approximately 45 liters, and a dry weight of around 1080 kg, underscoring its heavy-duty nature. This comprehensive manual provides essential information for maintaining and repairing the Volvo TWD1620GE. It details routine maintenance procedures, including guidance on oil change intervals, coolant types, and recommended oil grades, though specific intervals and grades are to be confirmed within the manual. The document serves as a critical resource for owners, mechanics, and technicians, offering technical specifications and troubleshooting guidance to ensure optimal performance and longevity of the engine.