The Cylinder Block Cleaning Brush cleans oil passages and cylinder bores after honing during engine rebuild processes. Cleaning action helps remove debris, residue, and remaining particles that can affect lubrication flow and surface condition. It supports smoother assembly by ensuring internal surfaces remain free from contamination. It helps maintain consistent oil movement during operation and reduces the chance of blockage.Attributes:• Helps remove honing residue from internal passages.• Supports clean oil flow by reducing blockage risk.• Improves the preparation of internal surfaces before assembly.• Circular brushes with nylon bristles and a single stem, single spiral, and carbon steel wire handle.• Provides with black level nylon bristles of 0.010 inch.• Stem has 13 galvanized.• Stem diameter is 0.168 inch.Applications: The Cylinder Block Cleaning Brush is applied during engine rebuild and maintenance activities where oil passages and cylinder bores require thorough cleaning after equipment processes.