Hey guys, today i decided to take out all vacuum hoses and test them, because i want to be sure that the geometry of turbo works fine. I tried to blow in every hose, everything ok, no air leak.
It's about M47 320d 136 hp engine and the picture below
In that main vacuum distributor(in the right side) are 3 pipes , first goes to turbo, second to EGR and third to air/engine flaps.
I blocked 2nd and 3rd pipes, and i let one 3mm hose in firt pipe which goes to turbo and vacuum tank.
When i blow in that hose , i can hear/feel somewhere that the air escapes.
I eliminated pressure converters because they have filters, by blocking 2nd and 3rd pipes.
It's okay to 'hear' that air when i blow in first pipe of vacuum distributor, or i have a vacuum leak ?