Cylinder Block Cleaning and Inspection

If the engine is disassembled, thoroughly clean the cylinder block with solvent. Remove old gasket material from all machined surfaces. Remove all pipe plugs that seal oil passages and clean out all the passages. Blow out all passages, then bolt holes and other openings with compressed air. Make sure threads in the cylinder head bolt holes are clean. Dirt in the threads may cause binding and result in a false torque reading. Use a tap to true-up threads and to remove all deposits. Thoroughly clean the grooves in the crankshaft bearings and bearing retainers.
Check all machined surfaces for burrs, nicks, scratches and scores. Remove minor imperfections with an oil stone.
Replace all plugs that show evidence of leakage. Inspect the cylinder walls for scoring, roughness or other signs of wear.