This workshop service manual covers the Mitsubishi K3M/K4M engine, a diesel engine known for its robust engineering and reliability. While specific production years are not detailed, this manual is designed to provide comprehensive information for this engine variant, which typically features a 3-cylinder configuration and a naturally aspirated aspiration. The engine is water-cooled and often utilizes an injection fuel system, making it suitable for a range of applications where dependable performance is paramount. The purpose of this manual is to serve as a definitive guide for owners, mechanics, and technicians. It provides in-depth service and repair information, covering all essential aspects of engine maintenance. Within these pages, you will find detailed procedures for various maintenance tasks, troubleshooting guidance for common issues, and critical technical specifications. Adherence to the guidelines and procedures outlined in this manual will ensure the optimal performance and longevity of your Mitsubishi K3M/K4M engine.