During the break-in period, how should engine speed be managed?

Managing engine speed during the break-in period is essential for ensuring that the engine components wear in properly and establish a good seal. Varying engine speed frequently helps the engine parts to experience different loads and temperatures, allowing for a more consistent wear pattern. This practice facilitates the proper seating of the piston rings, which is crucial for optimal compression and performance.

Operating at a constant RPM can prevent some components from breaking in correctly, as it might not expose them to the full range of operational conditions. Keeping RPM above the redline is detrimental to engine health, as it puts excessive strain on the engine and can lead to premature failure. Minimizing engine speed at all times may prevent necessary motion and stress on certain components, hindering their ability to break in effectively. Thus, frequently varying engine speed promotes better performance and longevity of the engine.