Abstract: A turbocharger comprising a compressor casing with a compressor impeller accommodated therein; a turbine casing with a turbine wheel accommodated therein and mounted on a shaft which also mounts said compressor impeller; and an intermediate casing which couples the compressor casing to the turbine casing. Provided in the turbine casing are two adjacent passages each of which serves the purpose of carrying exhaust gases to one half of the turbine wheel. The passages are isolated from each other at the inlet to the turbine wheel by means of two partitions. A disk to protect the intermediate casing against the effects of exhaust gas heat is mounted coaxially with the shaft between the intermediate casing and the turbine casing. The disk is held against the partitions by springs located in the intermediate casing and is adapted to be moved axially along the shaft by the agency of the difference between the pressures exerted by the exhaust gases and the springs.