DIY - M20 throttle body vacuum fittings

[AwakenNoMore]

Elbow
Hose barb

I bought the set screw at my local hardware store. The only thing that's really crucial is the 7/16-20 thread going into the throttle body itself -- what you choose to screw into the holes is totally up to you!

Link for the elbow doesn't appear to work anymore.

[stonea]

Great idea! I've never found a e30 without a vacuum leak.

[Kershaw]

This is a really good idea. Might need something similar for the icv side too.

[modernist]

where did you buy all the fittings and stuff?

Elbow
Hose barb

I bought the set screw at my local hardware store. The only thing that's really crucial is the 7/16-20 thread going into the throttle body itself -- what you choose to screw into the holes is totally up to you!

[efficient]

where did you buy all the fittings and stuff?

[5Toes]

thanks for sharing! going to try this on a spare throttle body!

[modernist]

Great timing, one of my coolant to TB hoses puked, so I'm cleaning up the mess under the intake. Will do this at the same time. Kudos for a thorough and clear DIY.

Let us know how it goes! :)

[modernist]

Is the dual ports just for more vacuum? I'm trying to clean it all up get rid of what isn't needed.

Not sure what BMW's rationale was ... late model manual M20 cars just had one vacuum line, while automatics had two ...

[mikebloco]

On my 91 I have two ports going to the vacuum booster like this


Is the dual ports just for more vacuum? I'm trying to clean it all up get rid of what isn't needed.

[funcrew]

Great timing, one of my coolant to TB hoses puked, so I'm cleaning up the mess under the intake. Will do this at the same time. Kudos for a thorough and clear DIY.

[efficient]

Nice diy. Might have to try this.

[frankenbeemer]

Very thorough write up and great pictures. You should get a merit badge for this. Thanks!

[barry]

Thanks for sharing

[FreedomM3]

Great documentation and work! Thanks for sharing

[jeffnhiscars]

Nice DIY for a persistent problem.