Exhaust gas turbine casing

The exhaust gas turbine includes a housing (1), a shaft (3) in a bearing housing (4), a turbine wheel (5) and a heat shield wall (2), which bounds an inflow channel (6) to the turbine wheel, along with the housing. When the wall becomes hot, its two layers are pressed against the bearing housing and the turbine housing, pressing the latter outwards, centering the wall and the housing.