What is a key indicator that an engine is ready for regular use after an overhaul?

A key indicator that an engine is ready for regular use after an overhaul is that it does not leak oil after warming. This is significant because oil leaks can indicate improper sealing, which could lead to lubrication issues and potential engine damage. After an overhaul, it is crucial that all gaskets, seals, and components are correctly installed to ensure that the engine operates efficiently and safely. An engine that maintains proper oil integrity demonstrates that the critical parts are functioning as intended and that the engine is prepared for reliable performance.

While maximum horsepower and having the engine run quietly without vibrations or reaching maximum RPM quickly are indicators of good performance, they do not directly confirm the integrity and reliability of the engine after an overhaul. Assessing for oil leaks is a practical and essential check during the post-overhaul inspection, as it directly impacts the engine's longevity and operational safety.