This manual covers the Volvo TAD1642GE, a powerful 6-cylinder turbocharged and intercooled diesel engine from the TAD1600 family. Designed for demanding applications, this engine delivers robust performance with a displacement of 16.1 liters, producing up to 460 kW (625 hp) and 2680 Nm of torque. Its advanced engineering ensures reliability and efficiency, making it a dependable choice for various industrial and heavy-duty uses. The water-cooled system further contributes to its operational stability under challenging conditions. The purpose of this Service Repair Workshop Manual is to provide comprehensive guidance for the maintenance and repair of the Volvo TAD1642GE engine. It includes detailed information on engine identification, general precautions, disassembly and assembly procedures, special tools, and specific system overhauls for the engine body, fuel system, cooling system, exhaust system, and electrical system, including the alternator and regulator. Furthermore, the manual offers essential troubleshooting guidance, servicing specifications, tightening torques, and wiring diagrams, empowering owners, mechanics, and technicians to effectively maintain and service the engine.