theblack, thanks for this thread ! Now my car has started the SSSSSSSSSSS sound, once rpm goes above 2000 ,now neeed to know whether this is an turbo leak or default noise!!! Will visit TASS soon. You have pointed the right thing,how one can diagnose the turbo leak with just hearing the sound or the car pull/pick up at the rated(turbo kick-in) rpm's ? its hard to guess..