This Service Repair Workshop Manual covers the Volvo TAD1641VE and TAD1642VE engines, part of the TAD1640GE engine family. These inline 6-cylinder, 4-stroke diesel engines are engineered for demanding Industrial, Marine, and Heavy Duty applications, offering robust performance with power outputs up to 570 kW (764 hp) and substantial torque. Their advanced fuel injection systems and compliance with various emission standards underscore Volvo's commitment to power and efficiency. This manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of these engines. It details engine identification, general precautions, disassembly and assembly procedures, maintenance checklists, and specific servicing specifications, including tightening torques. Coverage extends to critical systems such as the fuel, cooling, exhaust, and electrical systems, along with filters and lubrication. This resource is essential for owners, mechanics, and technicians to ensure optimal performance and longevity of the Volvo TAD1641VE and TAD1642VE engines.