A turbocharger having a variable-nozzle turbine, comprising: a turbine comprising a turbine housing and a turbine wheel mounted in the turbine housing and connected to a rotatable shaft for rotation therewith, the turbine housing defining a chamber surrounding the turbine wheel for receiving exhaust gas, and an axially extending bore through which exhaust gas is discharged after passing through the turbine wheel; a nozzle leading from the chamber generally radially inwardly to the turbine wheel; a compressor comprising a compressor housing and a compressor wheel mounted in the compressor housing and connected to the rotatable shaft for rotation therewith; a center housing connected between the compressor housing and the turbine housing and having a nose portion adjacent the turbine wheel defining a generally radially outwardly facing first surface and a second surface that faces generally axially toward the turbine wheel; a generally annular nozzle ring having a first face comprising one wall of the nozzle and axially spaced from an opposite wall of the nozzle, and an array of vanes circumferentially spaced about the nozzle ring and disposed in the nozzle, the vanes being rotatably mounted to the nozzle ring such that the vanes are variable in setting angle for regulating exhaust gas flow to the turbine wheel, the nozzle ring adjacent an inner diameter thereof defining a generally radially inwardly facing third surface spaced from and opposing the first surface of the center housing; and an elastically deformable locator disposed between the first surface of the center housing and the opposing third surface of the nozzle ring, characterised in that the locator comprising a metallic ring having a radially undulating waveform shape that repeats a plurality of times about a circumference of the locator, the locator in a relaxed state having an outer diameter that exceeds an inner diameter of the third surface of the nozzle ring, the locator being installed in a circumferentially preloaded state between the third surface of the nozzle ring and the first surface of the center housing, the locator serving to radially locate the nozzle ring relative to the center housing. a turbine comprising a turbine housing and a turbine wheel mounted in the turbine housing and connected to a rotatable shaft for rotation therewith, the turbine housing defining a chamber surrounding the turbine wheel for receiving exhaust gas, and an axially extending bore through which exhaust gas is discharged after passing through the turbine wheel; a nozzle leading from the chamber generally radially inwardly to the turbine wheel; a compressor comprising a compressor housing and a compressor wheel mounted in the compressor housing and connected to the rotatable shaft for rotation therewith; a center housing connected between the compressor housing and the turbine housing and having a nose portion adjacent the turbine wheel defining a generally radially outwardly facing first surface and a second surface that faces generally axially toward the turbine wheel; a generally annular nozzle ring having a first face comprising one wall of the nozzle and axially spaced from an opposite wall of the nozzle, and an array of vanes circumferentially spaced about the nozzle ring and disposed in the nozzle, the vanes being rotatably mounted to the nozzle ring such that the vanes are variable in setting angle for regulating exhaust gas flow to the turbine wheel, the nozzle ring adjacent an inner diameter thereof defining a generally radially inwardly facing third surface spaced from and opposing the first surface of the center housing; and an elastically deformable locator disposed between the first surface of the center housing and the opposing third surface of the nozzle ring, characterised in that the locator comprising a metallic ring having a radially undulating waveform shape that repeats a plurality of times about a circumference of the locator, the locator in a relaxed state having an outer diameter that exceeds an inner diameter of the third surface of the nozzle ring, the locator being installed in a circumferentially preloaded state between the third surface of the nozzle ring and the first surface of the center housing, the locator serving to radially locate the nozzle ring relative to the center housing.