Where is that line going?

[grounch]

Hi
I was replacing my vacuum lines and couldn't do one because i had no idea of where the other end is plugged.
Here is 2 illustrations that should be self explanatory.
Goes somewhere under the engine.

[Clavurion]

That vacuum line goes to engine mounts. That hard line is attached on the front subframe.

https://www.realoem.com/bmw/enUS/sho...diagId=22_0076

[X5chemist]

Ok, what do they do?

[SirHiss]

Active noise dampening.

[Clavurion]

Originally Posted by X5chemist

Ok, what do they do?

On low engine speed they activate to be softer to prevent engine resonances on body.

https://www.pss-autosoft.net/diagram...702FB67003.htm

[grounch]

Interesting, I wonder how it really works, wasn't imagining engine mounts to be an interactive part

[Clavurion]

Originally Posted by grounch

Interesting, I wonder how it really works, wasn't imagining engine mounts to be an interactive part

They are actually quite complex parts.

https://www.manualslib.com/manual/15...page=47#manual

[X5chemist]

Which models had them? I know mine doesn't. The recent mount replacements just bolted on.

[Clavurion]

Originally Posted by X5chemist

Which models had them? I know mine doesn't. The recent mount replacements just bolted on.

Only 6 cylinder diesel engines.

[grounch]

Good to know, thanks for the knowledge sharing. Quite an advanced tech for a 17 years old car.