What Causes Engine Bearing Noise?

1 Answers
Figueiredo
07/30/25 1:57am
Engine bearing noise is caused by: 1. Excessive clearance between piston and cylinder wall; 2. Over-tight assembly of piston pin or connecting rod bearing; 3. Excessive clearance between tappet and its guide hole; 4. Wear of camshaft profile; 5. Loose starter claw causing pulley noise; 6. Severely loose connecting rod bearing cap bolts or complete melting/detachment of connecting rod bearing alloy. The function of an engine is: to convert the thermal energy of gasoline or diesel into mechanical energy by pushing the piston through the expansion of gas after combustion in a sealed cylinder. Engine maintenance methods include: 1. Regular oil and filter replacement; 2. Using lubricating oil of appropriate quality grade; 3. Regular radiator cleaning; 4. Periodic cleaning of air filter, oil filter, and fuel filter; 5. Maintaining good crankcase ventilation with regular cleaning; 6. Regular fuel system cleaning.
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