volume-changes-during-heat-treatmentOther engine types have evidently already hadproblems due to volume changes resulting fromheat-treatment of the parts.Clearance bridgedJammingGallingStored for several hours at temperatures around - 25 °CVery few " "of playMovable piston madefrom hardened steelwith an incomplete micro-structural transformationHigh-precision part of the fuel systemHardened steel sleeve850°C800°C910°CAustenitization temperaturesDimensional change [% ]0.4 0-0.4-0.8-1.2-1.6Annealing temperature [°C]RT180240