having melted piston number 4 I have fitted a rebuilt engine, however I want to know wether the turbo (that was fitted on previous engine) may be contaminated with bits of molten alloy? the piston melted due to sustained high speed run (fuelling must have gone out of wack) mfi. im in the procces of bolting everything up and wanted to be sure before I start the motor and have it set up, cheers