Originally Posted by STE92VE
If it's a "normal" tick, I think it has to do with the oil being thick when cold and when it warms up and thins out, the ticking stops.
^Right, if you listen very carefully, upon cold start up you may hear suttle noises as things are warming up. If you take your car in to complain about this, they are going to tell you its normal and all cars do this.
However, the audio file posted WAY back somewhere in this thread clearly demonstrates the more pronounced ticking that is freaking out what appears to be quite a few of us.
Because our ~$40K+ BMWs that we are so devoted to SHOULD NOT sound like a diesel truck after driving them around town for 15-30 minutes.
This noise is VERY distinct from the normal faint tapping or ticking the car may make upon cold start up.