Break-in (mechanical run-in)

Break-in, also known as mechanical run-in, is a process that involves the gradual settling of parts in a mechanical system, such as an engine or transmission, to ensure that they operate effectively and efficiently. This initial period is crucial for several reasons: 1. **Seating of Components**: During break-in, components such as piston rings and cylinder walls wear slightly to create a better fit, which can improve sealing and reduce blow-by (the escape of combustion gases past the piston).