An engine overhaul is a comprehensive process that involves disassembling an engine to inspect, repair, or replace its internal components. This procedure is typically performed when an engine shows signs of wear, reduced performance, or mechanical failure. Key components such as the cylinder head, pistons, and crankshaft are examined for damage and may be refurbished or replaced to restore the engine's efficiency. During an overhaul, technicians may also clean various parts and replace gaskets and seals to prevent leaks. This process can extend the life of the engine and improve its performance, making it a valuable maintenance option for vehicles and machinery that rely on internal combustion engines.