Servo Hose Plumbing
 

Need a spot of advice guys.

Just started finalising the position of the AFM in my Cabrio and need to have it facing downwards to the rear as Peter had his in his Sportster. I will have to move the idle control valve as it means rotating the rubber elbow.

Rotating the elbow also moves the servo connection on the elbow to the top... so here's where I need the advice.

Can I do away with the original complicated dual servo connections off the inlet manifold and elbow and just run a single take off from the manifold straight to the servo via a non return valve and then blank the connection on the elbow and the bottom connection on the inlet manifold.

Problem is I don't have the original t-piece and check valve that connects the two servo take offs together and the parts are not available from BMW.

I had thought the t - piece tube was just a T connection but it shows on real oem as an "air pump" what does it do and do I need it?

The check valve that connects the two servo take offs is $74 so not just a simple non return I assume, what does this do and can I get rid of it?

And finally what did most people do with the cam box breather, run it into a catch tank or filter??, I am not really sure where it connected to on the e30 I assume into the air box which I don't have.

Advice appreciated.

Cheers


John

John
I have my servo take off straight off manifold ,no 'air pump' or dual take off's. Cam cover pipe goes into side of throttle body above two small diameter water pipes. you can e mail me alison.hogg2 at ntlworld.com and I'll send you images of my set up.
regards Alan

Thanks Alan, email sent.

John

I changed mine to a single valve (from the E36) with a pipe running to the servo. I blocked off the lower hole:

http://www.msportster.co.uk/gallery/...ruction409.jpg

http://www.msportster.co.uk/wp-conte...111-145635.jpg

Hi Patrick

Your setup looks like I envisaged doing it.

I just wondered if there was a reason BMW had gone with a double valve that was fed from both the pre and post throttle body sides of the inlet.

In the absence of any good reason to do as BMW did I'll follow your route and go with a single outlet and check valve.

Cheers

John

I really don't know why they had the complicated setup - I decided 10 years of their development progress was good enough to switch to the newer way. :)