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Phenomenon: The exhaust smokes black smoke, the power drops, and the supercharger has abnormal noise.
1. If there is metal friction sound, the supercharger rotor bearing or the thrust bearing wears too much, and the impeller is generated by friction with the supercharger shell.
2. If it is not the metal friction sound, but the airflow sound, it is due to the high-speed rotation of the supercharger rotor, the resulting rotating sound, or the air leakage phenomenon caused by poor connection at the inlet and exhaust ports.
(1) The former should replace the damaged spare parts for repair according to the wear and tear.
(2) The latter should be carefully distinguished and targeted.