Outline atleast seven major checks for wear , tear and damage after dismantling an internal combustion engine

When dismantling an internal combustion engine, it is crucial to perform thorough checks for wear, tear, and damage to ensure the engine's components are in good condition for reassembly or reconditioning. Here are seven major checks to consider: 1. **Cylinder Walls**: - Inspect for scoring, scratches, or wear patterns. Measure cylinder bore diameter and taper with a precision tool. Check for out-of-round conditions. - Look for ridge formation at the top of the cylinder from piston wear. 2. **Pistons**: - Examine piston heads for signs of melting, carbon buildup, or detonation damage. - Check the skirts for scuffing, wear patterns, and clearance with cylinders. Measure piston diameter and check for ovality. 3. **Connecting Rods and Bearings**: - Inspect connecting rods for bending, twisting, or cracks. Look for signs of overheating or discoloration. - Measure bearing clearances and examine bearings for scores, pitting, or unusual wear patterns. 4. **Crankshaft**: - Check for journal wear using micrometers; look for scratches or pitting on journal surfaces. - Inspect the keyway for damage and check for any signs of warpage or cracks. 5. **Valvetrain Components**: - Inspect camshaft lobes for wear, scoring, and profile changes. Measure lift and check for excessive wear. - Examine rocker arms, pushrods, and followers for signs of wear, bending, or damage. 6. **Gaskets and Seals**: - Examine all gaskets and seals for signs of leaks, cracking, or degradation. Check for signs of oil or coolant leaks on mating surfaces. - Assess the surface finish of mounting areas for flatness and wear that could affect sealing. 7. **Timing Components**: - Inspect timing belts/chains for signs of wear, fraying, or alignment issues. Look for stretch or damage in chain links. - Check tensioners and guides for wear and proper tension. Performing these checks will help identify any components that may need replacement or reconditioning, ultimately contributing to a reliable rebuild of the internal combustion engine.