Here's a breakdown of the engine rebuild process: 1. Engine Removal (if necessary): In many cases, the engine must be removed from the vehicle to perform a full rebuild. This step can involve draining fluids, disconnecting components like the exhaust, intake, and electrical systems, and carefully removing the engine. 2. Disassembly: The engine is completely disassembled. This includes removing the cylinder head, pistons, crankshaft, timing components, and all internal parts. The goal is to inspect every component for wear, cracks, or damage. 3. Inspection and Cleaning: All parts are thoroughly cleaned, and each component is carefully inspected. Parts like the cylinder head, pistons, crankshaft, and valves are examined for cracks, wear, and any signs of damage that would require replacement. Common parts that are replaced during a rebuild include pistons, rings, bearings, gaskets, and seals. 4. Machining: The engine block and other major components may need to be machined. This involves processes like honing the cylinder walls, resurfacing the cylinder head, or grinding the crankshaft. The goal is to ensure all parts are within the manufacturer’s specifications for tolerances. 5. Reassembly: After inspection and machining, the engine is reassembled with new parts as necessary. This involves carefully reattaching components like the pistons, crankshaft, cylinder head, valves, and timing components. New gaskets and seals are installed to ensure there are no leaks. 6. Testing: After reassembly, the engine is typically tested for functionality. This can include performing a compression test, checking for leaks, and ensuring proper timing and oil flow. 7. Reinstallation (if removed):