This workshop repair manual covers the RENAULT (Diesel) SOFIM engine, featuring indirect injection and a 4-cylinder aluminum construction. It is applicable to a wide range of models including the Renault 18, Fuego, Renault 20, Renault 21, Renault 25, Renault 30, Safrane, Espace, Trafic, Master, and Jeep. The manual details engine types 852 and J8S, providing comprehensive information for maintaining and repairing these robust diesel engines. The purpose of this manual is to provide detailed guidance for engine overhauling, maintenance, and repair. It includes essential sections on engine identification, tightening torques, lubrication circuits, general specifications, standard replacements, and special tooling. Furthermore, it offers step-by-step procedures for dismantling and reassembling the cylinder head and cylinder block, including critical tasks such as checking and repairing valve seats, assessing rocker arm rails, and verifying piston and cylinder liner protrusion. This resource is designed for mechanics and technicians to ensure optimal performance and longevity of the SOFIM diesel engine.