As you probably already know, after a long trip at high speed, in no case should the engine be stopped immediately, it is necessary to let it idle for some more time. The reason for this is as follows: when stopping a hot engine quickly, the turbine shaft bearing can heat up so much that the grease starts to burn. If this action is repeated, the turbine will jam.
The turbocharger is very sensitive to contamination, therefore special cleanliness must be observed during removal and installation.