This workshop service repair manual provides comprehensive guidance for the Iveco C13 ENS M33 and C13 ENT M50 engines. These internal combustion engines are designed for demanding applications, and this manual details their service and repair procedures, including operations on the installed engine and complete engine overhaul. The engineering behind these engines emphasizes reliability and performance, ensuring they meet the rigorous standards expected in their intended use. The purpose of this manual is to serve as an authoritative resource for maintaining and repairing the specified Iveco engines. It covers a wide range of essential topics, including detailed maintenance procedures, diagnostics, electrical equipment, technical data, and safety regulations. Additionally, it outlines the necessary tools and provides an overview of the engine systems. This manual is intended for owners, mechanics, and technicians to ensure the optimal performance and longevity of their Iveco C13 ENS M33 and C13 ENT M50 engines.