280i fuel hoses
Discussion
Hi guys, inspired by Zigs cooling hose diagram, I've done one of my fuel hoses.. Hoping someone can shed some light on a question I have.
I need to know how to connect up the 4 numbered pipes. They are all the same size, but when I pulled the car apart, only 1. and 4 existed, and were connected, i.e. the fuel return went back into the nearside tank.
However.... I now have a brand new swirl pot (3) and a brand new fuel accumulator (2). BOTH have an extra outlet pipe compared to the "originals". Should I blank off 2 and 3 or is there a better solution?
Thanks in advance!
Toby
I need to know how to connect up the 4 numbered pipes. They are all the same size, but when I pulled the car apart, only 1. and 4 existed, and were connected, i.e. the fuel return went back into the nearside tank.
However.... I now have a brand new swirl pot (3) and a brand new fuel accumulator (2). BOTH have an extra outlet pipe compared to the "originals". Should I blank off 2 and 3 or is there a better solution?
Thanks in advance!
Toby
Thanks guys. Bit of a puzzle, this!
The thin outlet from the swirl pot (3) was called a "breather" by RT, and takes bubbles out of the fuel feed, so I agree it should terminate at the tank (4). Can the swirl pot also accept returned fuel from (1) (say via a T piece)? Seems counter intuitive.
But if so that would just leave (2), from the accumulator. As I understand it there is a diaphragm in there so it shouldn't have fuel coming through unless it fails. As I say, the old one had no such outlet.
Any other thoughts?
The thin outlet from the swirl pot (3) was called a "breather" by RT, and takes bubbles out of the fuel feed, so I agree it should terminate at the tank (4). Can the swirl pot also accept returned fuel from (1) (say via a T piece)? Seems counter intuitive.
But if so that would just leave (2), from the accumulator. As I understand it there is a diaphragm in there so it shouldn't have fuel coming through unless it fails. As I say, the old one had no such outlet.
Any other thoughts?
Could be Aaron. You'd think either a swirl pot breather is required or it isn't. If I blanked it off with some hose and a bung there should be no difference as it would then be like my old one which gave no trouble at all.
Heard from KMI who supplied the accumulator and fuel pump, and they say the outlet on the back is a breather (If the seal goes fuel will come out) and that some manufacturers pipe it to the tank while others leave it completely open. Don't fancy that really, but equally I don't fancy the fuel return being connected to the back of the accumulator.
How about: fuel return (1) to tank (4), blank off swirl pot and cap off the accumulator leaving a small breather hole to prevent pressure behind the diapgragm?
Heard from KMI who supplied the accumulator and fuel pump, and they say the outlet on the back is a breather (If the seal goes fuel will come out) and that some manufacturers pipe it to the tank while others leave it completely open. Don't fancy that really, but equally I don't fancy the fuel return being connected to the back of the accumulator.
How about: fuel return (1) to tank (4), blank off swirl pot and cap off the accumulator leaving a small breather hole to prevent pressure behind the diapgragm?
Hi all, can anyopne tell me (or post a photo of) the route the fuel hose and return line follow from the nearside outrigger into and out of the engine bay please? do they use the hole in the top of the wheelarch and if so, is there a grommet and some protection from stones coming off the front N/S wheel? Just one more photo I didn't take before dismantling! Thanks.
Thanks guys, a pic would be great Marcus.
Zig, wiring loom goes through a hole high in the passenger footwell then along inside the fender until it emerges through a hole inside the N/S headlamp pod.
I think you're right Andy, does your hose hide behind the chassis rail?
I've put both hoses on the outrigger like the photo on P116 of the Bible (which is how my car was also).
Of course, the primary concern is to protect the hoses from stones thrown up by the front wheel.
There are some rivets at the back of the wheelarch which makes me think there might have been a protective glassfibre panel there, but do you think I can remember??
Zig, wiring loom goes through a hole high in the passenger footwell then along inside the fender until it emerges through a hole inside the N/S headlamp pod.
I think you're right Andy, does your hose hide behind the chassis rail?
I've put both hoses on the outrigger like the photo on P116 of the Bible (which is how my car was also).
Of course, the primary concern is to protect the hoses from stones thrown up by the front wheel.
There are some rivets at the back of the wheelarch which makes me think there might have been a protective glassfibre panel there, but do you think I can remember??
Okay interesting. just adding a couple of pics from the bible and of my car to illustrate. I don;t have any such plate so I might run the hoses along the back of the chassis member into the engine bay and maybe put a protective pipe of some sort over them. 
Edited by 440Interceptor on Monday 25th April 03:53
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