What Sound Does Engine Cylinder Scoring Make?
2 Answers
Engine cylinder scoring produces a rattling sound. Engine cylinder scoring refers to deep grooves being formed on the inner walls of the cylinder, causing the piston and piston rings to lose their sealing ability when rubbing against the cylinder walls. This results in reduced cylinder compression pressure and loss of power. The solutions for engine cylinder scoring include: 1. Promptly replenishing engine coolant; 2. Refilling engine oil; 3. Replacing piston rings and piston pin circlips. The causes of engine cylinder scoring are: 1. Engine overheating due to coolant leakage or insufficient coolant levels that were not replenished in time; 2. Low engine oil levels, leading to loss of cylinder sealing and lubrication function; 3. Broken piston rings scratching the cylinder walls; 4. Dislodged piston pin circlips scratching the cylinder walls; 5. Piston rings getting stuck in the ring grooves due to carbon buildup, losing their sealing effect; 6. Piston pins protruding and scratching the cylinder walls; 7. Foreign objects entering the cylinder; 8. Insufficient clearance between the piston and cylinder walls.
Piston slap is a particularly harsh metallic knocking sound resembling constant hammering inside the engine. I've encountered this while driving, especially during cold starts or sudden acceleration when the noise becomes exceptionally clear, accompanied by vehicle vibration and power loss. The cause is typically piston rings colliding against worn cylinder walls. This reminded me to check if the engine oil was insufficient – that time my car suffered severe piston slap due to inadequate lubrication from oil starvation. Immediate action is required, otherwise it may lead to more serious failures like complete engine seizure, which would incur much higher repair costs, potentially requiring a full engine replacement. For prevention, regular maintenance and timely oil changes are crucial.
