bmwe21.net forums

Posted: **Tue Mar 28, 2023 6:03 pm**

Hello guys,

I was wondering if any of you have a picture or some kind of documentation regarding the original routing of BMW E21 316 vacuum hoses, I suspect that mine are routed wrong because some hoses seem to do nothing, just to suck air from outside past the carburetor, and the carburetor's secondary barrel doesn't open under acceleration, although that might be a different issue. Any information is useful because I can't really find anything online.

Thanks

Posted: **Tue Mar 28, 2023 11:06 pm**

Sadly nothing in my archives

Posted: **Wed Mar 29, 2023 6:18 pm**

I guess I will go trial and error route if I don't find anything and post my findings here for anyone who needs it

Posted: **Wed Mar 29, 2023 6:29 pm**

Hey,

This means that you have the early carb on it? 32/32 DIDTA??

If that so i may be able to help you.
Please post some pictures of you're vacuumlines so I can compare them with teh pictures and info i have.

Posted: **Thu Mar 30, 2023 4:59 pm**

I have the Haynes manual, tonight I'll check if there is an empty line

Posted: **Thu Mar 30, 2023 6:48 pm**

quick question, how to upload photos?

Posted: **Thu Mar 30, 2023 7:06 pm**

well...

Posted: **Thu Mar 30, 2023 7:21 pm**

Thanks, I will upload some photos shortly.

Posted: **Sat Apr 01, 2023 3:22 pm**

I have uploaded some photos, I hope that's helpful.
https://myalbum.com/album/R8Xo4ewkxcx5dy/

bmwe21.net forums

Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)

Re: Vacuum diagram for 1975 BMW E21 316 (Pre-facelift)