Technical manual for the Mahindra SZ 2498 TCI and SZ 2600/SZ 2600 Plus TCI direct-injection diesel engines, written in English. The document provides detailed specifications, maintenance schedules, and construction features of these 4-cylinder engines. The "Plus" engines are distinguished by their chain drive. It includes information on the cylinder head, pistons, lubrication system, cooling system, and tightening torques for critical components such as the cylinder head.