Abstract: A method of reworking a corroded turbine housing for a turbocharger of a marine engine so that the corroded housing may be restored and reused. A turbine housing includes a central aperture for containing a turbine blade assembly and directing exhaust gases past the turbine blades in a turbocharger. The central aperture of a used turbine housing often is corroded such that the central aperture is enlarged and allows significant leakage. The corrosion may be removed and the aperture enlarged to receive an insert. The insert may have an insert aperture that is slightly larger than the diameter of a turbine blade assembly. The insert restores the sidewalls of the aperture through the turbine housing so that the amount of exhaust gases leaking past a turbine blade assembly is significantly reduced, thereby restoring the efficiency of the turbocharger and improving performance of the engine to which the turbocharger is attached.