What is involved in an engine rebuild?

The process of an engine rebuild is comprehensive and involves disassembling the engine to access its internal components. This step allows for a thorough inspection of critical parts such as pistons, connecting rods, crankshafts, and cylinder heads to assess wear and damage. After inspection, components that do not meet specifications are either repaired or replaced. Once all necessary repairs are made, the engine is carefully reassembled, ensuring that all parts are aligned and sealed properly.

This detailed procedure is crucial for restoring the engine to a condition where it can operate effectively and reliably. It goes beyond basic maintenance tasks like changing oil or filters, which are essential for regular upkeep but do not address internal wear and tear. Similarly, merely replacing belts and hoses or flushing the cooling system does not encompass the extensive work required in a full engine rebuild. Therefore, option C accurately captures the complex nature of what an engine rebuild entails.