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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 03-25-2016, 12:45 PM   #1
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Join Date: Aug 2014
Location: El Paso
Posts: 158
My Ride: BMW 2003 330xi
PLEASE HELP: Fuel Rail Disconnect + Broken hose

So I'm trying to replace my fuel injector o-rings, and want to pull the fuel rail off so I can clean it. Mine is full of black gunk where the injectors sit.

I have tried to follow this image: http://i.imgur.com/aNqkMgb.jpg (keep in mind, this is all by feel), but cannot get enough strength to push it, and hold the blue ring back, and pull up on the rail. I even tried with a friend, and we cannot manage to grab the fuel line with any significant force, and the area is too small to get a tool into.

While doing this, we broke an old hose, it seems to be very brittle. Can anyone elaborate what this hose does, and how I should go about replacing/fixing it? Will I end up just taping it and praying to BMW that all works well?

Thank you in advance

I ended up just moving the fuel rail to the side and replacing the o-rings on my injectors. I cleaned the bottom of the injectors and mating surfaces with a clean towel and some 70% alcohol. Lots of black stuff came off. Got the clips back on nice, and made sure everything was seated, and relieved the pressure from the fuel rail once more and a mixture of air and fuel sprayed out, conitnues this until only fuel came (about 1 second)
Started up just fine. Took her for a drive, and everything seems good. I hadn't put the cabin air box back on, but the engine sounded a bit different. Like I could hear the injectors spraying. Is this normal? I made sure they were very clean before I re-installed them.

Last edited by Kye7; 03-25-2016 at 04:20 PM.
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Old 03-25-2016, 11:52 PM   #2
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Join Date: Jul 2005
Location: Seattle
Posts: 74
My Ride: '03 330 Ci
It's a rubber vacuum hose for the SAP. It's only ~6 inches long, just rip it out and replace it with new hose. A little mirror helps to see the nub it connects to at the back of the manifold, and the other end goes on the hard plastic tube that runs to the SAP. Lots of threads on this, just search for 'sap vacuum hose'.
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