vibration at 2000rpm just got louder..
Hello people, i had this little metalic vibration ever since i bought my 156 ts 2.0L when the engine revs at 1950-2100rpm, and also when my a/c is on and the engine is on idle and revs those couple of revs lower, the vibration sound can be heard again. Today however after having used the car twice in the morning, i went to pick my girlfriend up from work and that little vibration sound sounded a hell of a lot louder. It sounds like some metal plate came lose completely, but i can't find the cause! I allowed the engine to cool down to a point where i could prod around with my fingers to feel for something lose, i had no luck still. I know where the sound is coming from i think, and as weird as this may sound i think the sound is coming out of the oil filter. In fact while i was under the car and my girlfriend was keeping the engine reving at 2000rpm, i put a screw driver against the oil filter and i felt the loud vibration through the screw driver.
I have removed the engine cover and looked under that, removed the manifold heat shield, maybe that thin piece of metal was vibrating against the maifold, but i found nothing there what so ever. I don't want to drive the car now, i'm scared it can be something serious even though the car runs just fine and as stupid as this may sound, i'm out of work at the moment and cannot afford to take it to the alfa garage.. Oh and before i forget, i think my oil filter is leaking slightly? It must be because i found a drop of oil at the very bottom of the seals. I can afford to change the oil and the filter, so if anyone thinks i should, please let me know.