Phenomenon: black smoke exhaust, power drop, and the supercharger has abnormal sound.
The reason:
1. If there is metal friction sound, the turbocharger rotor bearing or thrust bearing wear is too much, the impeller and the turbocharger shell friction.
2. If it is not metal friction sound, but air flow sound, it is due to the high-speed rotation of the turbocharger rotor, the rotating sound, or the air leakage phenomenon caused by the inlet and exhaust interface is not well connected.
Treatment method:
1. The former shall be repaired by replacing the damaged spare parts according to the wear and tear.
2. The latter should be carefully distinguished and targeted.