This comprehensive service manual covers the Daewoo Doosan DB58, DB58T, and DB58TI diesel engines. Engineered for reliability and performance, these engines are designed for demanding applications where robust power and durability are essential. This manual provides all the necessary information to understand, maintain, and repair these powerful diesel units, ensuring they operate at peak efficiency throughout their service life. The purpose of this manual is to serve as a complete guide for owners, mechanics, and technicians. It details engine specifications, maintenance schedules, disassembly and reassembly procedures, and troubleshooting techniques. With clear instructions, diagrams, and illustrations, this resource empowers users to perform routine servicing, diagnose issues, and execute repairs effectively, minimizing downtime and maximizing the longevity of the Daewoo Doosan diesel engines.