Originally Posted by ajs
Has anyone tried relocating the fuel filter outside the fuel tank? I am sure you will agree that BMW has put it in one heck of a place. I am in the process of doing the 24,000 mile checks and will be replacing the fuel filter. Big job. I am seriously thinking about relocating the filter outside the tank in the fuel pressure line to the injector rail. What are the issues here? Is it the fact the line is under pressure and could present sealing problems? The automotive industry has been using external filters on pressurized fuel lines for years without problems.
Has anyone done this before? What was the result? Am I missing something here?
The benefit of your wisdom and experience is needed.
Yes, it has been done, but only by a couple of people.
Most of us don't see the big deal here. You have to remove the fuel tank to replace the air filter anyway, it is only 15-20 more minutes to replace the fuel filter during one of the air filter replacements, and every 24K is not very often for most, approx. yearly for the ones who ride all the time.
Yes, you can put it in the line TO the fuel rail, IF you can find a place to do so, as it is pretty darned crowded anywhere along that line.
One caveat: If you do decide to do it, be absolutely SURE you get a filter that is for a fuel injection system! Do not use one designed for a carbureted system! The high pressure of the fuel injection system, 50-60 PSI can rupture a filter made for carbureted pressures of 3-5 PSI.
Personally, the less connections in the high pressure fuel line outside the tank the better for me. Just less places to develop a high pressure fine spray leak, which can be nasty.