What is the reason for the air leakage sound after the turbo reaches 2000 RPM?

[Terrance]

This situation may be caused by a damaged blow-off valve in the turbocharger or an air leak in the intake pipe. Immediate inspection and repair are required when such a condition occurs. Below is relevant information about turbochargers: Introduction: A centrifugal compressor and turbine are combined into one unit, called a turbocharger. The main difference between it and a gas turbine is that the turbocharger does not have a combustion chamber or corresponding system. The turbine operates using the exhaust energy from a reciprocating internal combustion engine, and the compressed air provided by its centrifugal compressor serves as the charge for the reciprocating internal combustion engine. In a turbocharger, the compressor impeller and turbine are assembled on the same rotating shaft, called the rotor. Other components mounted on the same rotor shaft and rotating together include seals and thrust washers. Key components: The rotor is the critical component of a turbocharger. In addition, a turbocharger includes bearing assemblies necessary for normal operation, lubrication and cooling systems, sealing and insulation devices, as well as fixed parts such as the compressor housing, intermediate housing, and turbine housing.