yes its hard for peeps to believe that bits of turbine wheel can make there way up thru the ex manifold and f**k the pistons, it happend to me. while it was on limmiter.... needed a 40 thou rebore to get the scratches out..
this was 2 weeks after i paid 7k to sss for a 33 motor 4 years ago while i was a 4th year apprentice.. needless to say im still paying of the refineanced loan oh and it was on 10 pound! luck of the draw with the ceramic turbos..