This manual covers Volvo TAD1600 Series diesel engines, including models TAD1630GE/GE P V, TAD1631GE, TID162AP, TWD1620GE GH, TWD1630GE, and TD164KAE. These robust 6-cylinder, 16.1-liter engines are designed for demanding applications such as generators, industrial equipment, and marine use, delivering power outputs ranging from 200-500 kW and torque from 1200-2500 Nm. Engineered for reliability and performance, these liquid-cooled diesel engines are built to meet stringent emission standards like EPA and EU, ensuring efficient operation across various environments. The purpose of this Workshop Service Manual (WSM) is to provide comprehensive guidance for the maintenance, repair, and technical understanding of these Volvo engines. It details essential procedures, including recommended service intervals, oil capacities, and filter types, alongside technical specifications and troubleshooting information. This manual serves as an indispensable resource for owners, mechanics, and technicians, enabling them to effectively maintain the operational integrity, longevity, and performance of their Volvo diesel engines.