Engine mechanics is the study of how engines work and how to maintain and repair them. An engine converts fuel into mechanical energy, powering vehicles like cars and trucks. Understanding the components, such as the cylinder, piston, and crankshaft, is essential for diagnosing issues and performing repairs. Engine mechanics also involves knowledge of various systems, including the fuel system, ignition system, and exhaust system. Technicians use tools and diagnostic equipment to identify problems, ensuring engines run efficiently and safely. Regular maintenance, like oil changes and filter replacements, helps prolong engine life and performance.