First post here, I have a 1999 Cobra, pretty much stock. It's developed a ticking sound coming from what sounds like the bottom end. You can only hear it below 1,000 and above about 1,800 RPM. I've heard a thrown rob bearing before (had a 335xi throw one before) and it doesn't sound like that, and the fact that it doesn't make the sound all the way through the rev range makes me think it could be something else. Guy from a local shop said to try draining some oil and adding some Lucas Oil stabilizer, but that made 0 difference. Maybe I'm in denial, but I've just never heard of a knock being intermittent like that. Any input is appriciated!