Originally Posted by
blown sv
yes that would be correct ,the very early evo 3's had crank problems but that was fixed and has no longer been a problem, i would say you had a worn big end or a bad rear bearing which causes the crank pin to break , this will happen to any brand of motor
evo 3 sti's and evo 4's are one of the best motors youll get straight out of the box, even the evo 3 standard motor in great,
definatly not a common problem
Correction first batch evo 3s had crank problem, all that I know of broke.
This was fixed with more meat and less timing on crank intake, also hardening process was changed. I tested these cranks which were sent from the factory, they had less performance but not one broke that I know of.
Then came the evo 3 STI, coated crank I have seen most of these break at some stage, possibly too brittle. Evo 4s seem to be OK.
Cheers
Alex.K