What Causes Engine Piston-to-Cylinder Head Contact?
1 Answers
Engine piston-to-cylinder head contact occurs due to: 1. Hard foreign objects falling into the combustion chamber; 2. Broken intake/exhaust valve springs causing valves to drop into the cylinder; 3. Replacement pistons with non-compliant geometric dimensions during overhaul; 4. Excessive thickness of connecting rod bearing shims installed during overhaul. The engine serves as the power unit for automobiles, determining their power performance, fuel economy, stability, and environmental compliance. Engine maintenance methods include: 1. Regular oil and filter changes; 2. Maintaining proper crankcase ventilation; 3. Periodic crankcase cleaning; 4. Regular fuel system cleaning; 5. Scheduled coolant system maintenance.