What Is An Engine Overhaul

Definition And Types Of Overhaul
__________________________________

An engine overhaul means, Process of restoring and maintaining an equipment, machine, or system in a serviceable condition. Overhaul involves (1) partial or complete disassembly of the item, (2) inspection to detect damaged, defective, or worn parts, (3) repair or replacement of such parts, and (4) reassembly, testing, and trial-run prior to returning the item to its full operating level.
The term engine overhaul has two identifications that make a distinction between the degrees of work on an engine,
 Major Overhaul :- A major overhaul consists of the complete disassembly of an engine. The overhaul facility inspects the engine, repairs it as necessary, reassembles, tests, and approves it for return to service within the fits and limits specified by the manufacturer’s overhaul data. This could be to new fits and limits or serviceable limits.
 Top Overhaul :- Top overhaul consists of repair to parts outside of the crankcase, and can be accomplished without completely disassembling the entire engine. It can include the removal of cylinders, inspection and repair to cylinders, inspection and repair to cylinder walls, pistons, valve-operation mechanisms, valve guides, valve seats, and the replacement of piston and piston rings.