What Sound Does Engine Bearing Noise Make?
2 Answers
Engine bearing noise is a "clank, clank, clank" sound, resembling a short and rapid metallic knocking. The specific causes of connecting rod bearing noise are as follows: 1. Wear: Severe wear between the connecting rod bearing and the journal, resulting in excessive radial clearance. 2. Bolts: Loose or broken fastening bolts of the connecting rod bearing cap. 3. Bearing: Bearing alloy burned or peeled off. 4. Journal: Out-of-round connecting rod journal, causing poor contact between the journal and the bearing. 5. Blockage: Blockage of the main oil passage of the crankshaft, dirty oil pickup and filter, failure of the bypass valve, or failure of the oil pump, leading to excessively low oil pressure and poor lubrication of the bearing.
When it comes to engine bearing knock, I must warn you - it's a distinct metallic tapping noise that sounds like someone lightly hammering inside the cylinder block. The sound intensifies with RPM increase and becomes particularly noticeable during acceleration. The root cause is usually worn crankshaft bearings or connecting rod bearings, typically resulting from insufficient oil, poor lubrication, or long-term wear in older engines. Ignoring it could lead to bearing seizure and complete engine failure, making repairs economically unviable. My advice: if you hear this sound, immediately stop to check the dipstick for proper oil level. If abnormal, arrange for towing to a professional repair shop without delay. Regular oil changes are crucial - inspecting every 5,000 km can effectively prevent such issues.
