Regards to you all, serious, thanks for all help give so far. unfortunately i made the single test, i take it out the filter, strat the car and equal, the same problem(noise), unfortunately. the noise look like some gear or else runing, it sound like wheel without oil or something, like: uuuuuuuuuu, like to describe better but, only if i record the sound, but, how do i post here...?? The sound look like metal wheel runing uuuuuuuuuuuuuuuuuu, imagine start the car and the wheel start runing with out oil or else, look like that, and the sound cames out from that pipe.... Can be the gear box oil ? it must be change or is dry?? it could damage the engine...?? Regards