audi 80 b4 abk 116ps^^ just before so first I found out that I have a humming from the left front against the engine room(speed dependent) sometimes louder and quieter not depending on speed!!! what could that be? 2.im stood if I run the engine clapper or clacks it out of the cylinder head hydros? also while the drive is back and forth but then louder depending on speed 3. the speedometer does not go where could this lie? 4. he consumes my opinion after extremely vi el oil about 1 l at 600-800 km GROWS GLOCKSI