= Break-in (mechanical run-in)
{wiki=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).
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