How to Diagnose Abnormal Engine Noises?
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There are two methods for diagnosing abnormal engine noises, namely the manual experience auscultation method and the instrument-assisted diagnosis method. The following is a detailed introduction to diagnosing abnormal engine noises: 1. Manual experience auscultation method: Technicians reproduce the abnormal noise by changing engine operating conditions and other measures, identify the characteristics and patterns of the noise, and understand the engine's operating status and fault symptoms when the noise occurs, thereby determining the location of the noise. This is currently the most common and primary method used. During the process of diagnosing engine abnormal noises, a screwdriver is often used to listen to the noise. 2. Instrument-assisted diagnosis method: Due to the lower accuracy of the manual experience auscultation method, some instruments and equipment are commonly used to assist in auscultation and analysis. Commonly used instruments mainly include stethoscopes, noise meters, vibration analyzers, etc.