noisy vibration on the engine b6t

[razorzx66]

hi b6/b8 sifu out there i have some problem which i'm facing with my car..the engine when i push at 4k rpm it start vibrating so noisy (like the engine hit the body rapidly) some said mounting and some said it hit the crankshaft. I have check the mounting it still in very good shape and condition but i'm not sure about the crankshaft..i'm now start to hunting these problem hope you all can narrow the problematic area.

 

[razorzx66]

found the problem already...my aircond pulley and bearing damage got heavy friction..snap all my belting...then after changing the pulley..car is smooth back...no vibration...