This workshop service repair manual covers the Volvo TAD1641VE and TAD1642VE diesel engines. These inline 6-cylinder engines offer robust performance, with the TAD1641VE producing up to 540 hp and the TAD1642VE up to 551 hp, both at 1800-2100 rpm, suitable for demanding applications. Featuring a 16.1 L displacement, common rail fuel injection, and water cooling, these engines are engineered for reliability and power. This comprehensive manual, presented in English and spanning hundreds of pages, provides detailed guidance for maintenance and repair. It includes information on engine identification, general precautions, disassembly and assembly procedures, check and maintenance routines, special tools, and in-depth coverage of the engine body, fuel system, cooling system, exhaust system, and electrical system, including wiring diagrams. A troubleshooting guide and maintenance checklist are also included to assist owners and technicians in keeping the vehicle in optimal condition.