What Causes Excessive Engine Noise?

1 Answers
LeGiselle
07/29/25 6:25pm
Excessive engine noise can be attributed to: 1. Excessive carbon buildup in the engine; 2. Use of inappropriate engine oil or dirty engine oil. In addition, excessive engine noise can also be caused by abnormal engine sounds: 1. Loose screws on the engine underguard, which is a relatively common minor issue that can be resolved by tightening or adjusting the screws; 2. Aging engine mounts, which support the engine and need replacement when worn out; 3. Loose plastic components in the engine compartment, such as the engine cover or intake pipe, which can be fixed by tightening; 4. Abnormal noise from engine belts, including power steering belts and alternator belts, which can occur due to aging, excessive looseness, or tightness—adjusting the tension or replacing the belts can resolve the issue.
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