Brake Booster vacuum hose

garethashenden · Post by **garethashenden** » Wed Aug 24, 2011 9:46 pm

I'm just buttoning up my b34 swap, but I'm not sure what to do with the vacuum hose for the brake booster. I'm putting the engine in as is (although I have cleaned it well) and I'm keeping the Motronic fuel injection. Do I need to run this to the valve cover where is was before, or is there something else that could be done?

Thanks,
Gareth

Mike W. · Post by **Mike W.** » Wed Aug 24, 2011 9:57 pm

I'm guessing you're using the B34 intake manifold? That's the problem, the only really correct one came on '82 633s. Otherwise you will have to drill and tap or somehow insert a vacuum fitting into the manifold for your power brakes to be power. It is around the correct size, but does not connect to the valve cover breather. There is a flat spot where it came with the fitting on 633s, but it's blank on all but that one year and model.

garethashenden · Post by **garethashenden** » Wed Aug 24, 2011 10:05 pm

Yes I am using the 'b34 intake. Is there anywhere in particular I need to drill, or will anywhere on the manifold do?

Blaise · Post by **Blaise** » Fri Aug 26, 2011 1:47 pm

I just gave a motronic intake manifold that had been drilled just for this, to double 02 salvage. They may have sent it to aluminum recycling already...but I would call them and see if they still have it. Talk to Marshall and tell him that it was a part that I had dropped off.

Here is a photo of the socket that had been added:

<table><tr><td><a href="https://picasaweb.google.com/lh/photo/y ... site"><img src="https://lh4.googleusercontent.com/-u3EX ... C_0844.JPG" height="425" width="640"></a></td></tr><tr><td>From <a href="https://picasaweb.google.com/1030509870 ... ">Motronic vacuum socket</a></td></tr></table>