What are the initial symptoms of engine cylinder scuffing?

[DiEsther]

Here are the initial symptoms of engine cylinder scuffing: 1. Noticeable decrease in vehicle power under normal conditions, commonly described as lack of power. 2. Abnormal water temperature, with the gauge showing high temperature or even boiling shortly after starting the engine. 3. Increased exhaust emissions with blue smoke visible from the tailpipe. 4. Abnormal engine noises during operation - rough and muffled sounds, unstable idle speed requiring excessive fuel to maintain idle operation. 5. Engine misfiring or cutting out occurring after prolonged idling or shortly after driving begins. Here are preventive measures for engine cylinder scuffing: 1. For new or overhauled engines, proper break-in is essential. This involves operating under good lubrication conditions, gradually increasing speed from low to high and load from small to large according to break-in procedures before normal load operation. 2. Correctly select the clearance between piston skirt and cylinder liner, piston ring end gap and side clearance as specified in the manual. During repairs, ensure proper piston alignment and maintain cylinder liner dimensional accuracy. 3. Maintain normal coolant temperature between 70°C-95°C to prevent engine overheating. Use preheating measures before winter starts. 4. Operate the engine properly - avoid overload operation, unnecessary throttle revving, and starting without coolant. 5. Regularly maintain the air filter system to prevent dust ingestion into cylinders. 6. Maintain the lubrication system properly to prevent mechanical impurities and carbon deposits from contaminating the oil and accelerating cylinder liner wear.