Why is there abnormal noise in the crankshaft bearing?

1 Answers
MacElias
07/28/25 4:33pm
Crankshaft bearing noise may be caused by excessive wear between the crankshaft journal and the bearing, resulting in excessive radial clearance. Below are the relevant details: 1. Fault phenomenon: Crankshaft bearing noise refers to the knocking sound between the crankshaft bearing and the crankshaft journal. It is a heavy, dull metallic knocking sound that increases with engine speed and load, often accompanied by a drop in oil pressure and engine vibration. 2. Handling measures: If this fault occurs while driving, stop the vehicle immediately and tow it to the nearest repair shop or manufacturer for engine inspection and timely troubleshooting. Do not continue driving blindly, as this may lead to severe accidents such as bearing seizure or crankshaft breakage.
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