I have a 92 318i and I have a loud noise that's hard to describe, it almost sounds as if the engine is running rough but it's not coming from within the engine. I sounds like the fan or possibly the altenator (sp?). It's like a loud clicking rough sound. It somewhat goes away at higher than idle rpm's but as soon as I push in the clutch and the rpms drop, it's back. I looked and the fan doesn't run at idle (should it?) but I'm not having any temperature problems. I could really use some ideas on this one.