I have a 1988 735i and I don't have that yellow arrow thingie laying on my engine. I think if you took it away, the car might not make that noise. It's probably hitting a fan belt or something. Good luck.
Hello:
>
> For the last 8-10 days when I start my car this part under the hood sounds
> like a vacuum cleaner is running. Every so often it will squeal (bearing
> going bad maybe?). It only goes on when the car/engine is cold and only
> runs for a few minutes. After it stops I can shut off the car and re-start
> it without hearing that noise. After the car has been sitting (e.g. all day
> at work) and I start it I'll hear it again.
>
> I've highlighted it with the yellow arrows in the attached pics. What is
> this part and what function does it perform? I have no warning/check engine
> lights on.
>
> Thanks for your help,
>
> Bob
>
>
>