Fuel Line Type: Fuel line route:

[Johnny D]

Hi E9ers,
I am looking for some help on installing new fuel lines for my 3.0 CSI.

Fuel Line Type:
There does seem to be a varying degree of opinions, ie: copper, original
but the general census seems to point to the use of Cupro Nickel as the fuel line.

Fuel line route:
My other issue is the path that the fuel lines run under the car.
I am replacing the old Fuel line with a new one ( Please don't ask where the old one is.....long long story )
I can see pipe hooks that run along the left hand side, under the sills, but it looks like there is only provision for a single line.
But what about the return. I have looked at various under carriages, but I cannot see the details in any of the pictures.

Any help with pictures, links etc would be really appreciated.

PS: I have a RHD E9 so it may be different to the LHD E9s, but that may still be useful.

Thanks

 

[eriknetherlands]

My car also has no return line; it is a '73 3.0 CS with Carbs, EU version.

Build year and EU /US version will likely make the difference. What do you have?

 

[Johnny D]

Hi Eric, I have a 73 3.0 CSI UK build, and I can see on a diagram that there is a return.
CSI's and CSL's models require a fuel return.

Thanks

 

[JFENG]

Suggest you look at BAT auctions of CSI’s. The undercarriage photos show the dual fuel line routing.
example: Euro CSI

 

[sfdon]

i would use the pipe available from bmw. Already has correct shape and is so darn cheap. (About $ 35.00)

 

[OCCoupe]

i would use the pipe available from bmw. Already has correct shape and is so darn cheap. (About $ 35.00)

I did this but then had one made up in stainless using the factory pipe as a template.

 

[HB Chris]

And both run next to left side rocker.

 

[Johnny D]

Suggest you look at BAT auctions of CSI’s. The undercarriage photos show the dual fuel line routing.
example: Euro CSI

Thanks...Just did that and it seems that they are on the left side.

 

[sfdon]

pm sent- I have a csi on the lift this morning.

 

[Johnny D]

I did this but then had one made up in stainless using the factory pipe as a template.

pm sent- I have a csi on the lift this morning.

Is your Csi LHD an does it really matter

 

[HB Chris]

RHD and LHD are the same.

 

[OCCoupe]

The metal tabs are wide enough to fit both lines. Use some fuel line to protect them from rubbing against each other and be careful not to break the tabs.

 

[Cornishman]

Jonny
Or come and look at mine, it’s just up the road, well Essex.
I did what OCCoupe suggested and used rubber pipe to protect the fuel and brake pipes where they are clamped. The suction pipe into the fuel tank is important to stop the pump sucking air.

 

[sfdon]

I sent you 11 pics…

 

[Johnny D]

I sent you 11 pics…

Much appreciated. The help on here is legendary, and thats is why i give my support and help others, because i know as some stage i will get help. After all we don't know everything.

 

[boonies]

I am resurrecting this thread as I need to obtain and install a fuel line as part of my winter projects. The original line was gone when I acquired the car, and a rubber line is presently running up the drive shaft tunnel.

I attempted to order a new one, but have been told that the original BMW line is no longer available.

Do we now make our own? Is there a source for clips or were those made a part of the body or floor? Any pictures of the routing would be very helpful.

 

[HB Chris]

If you look up a 74 e9 BMW may still have the return line, it can easily be modified for use. It exits the forward side of spare tire well, goes to the driver rocker, clips under the rocker with tabs, turns 90 degrees at rear of front wheel well, turns 90 degrees and goes up frame rail to just inside the inner fender, fuel hose after that.

 

[boonies]

Thanks Chris, I did find it available. Order placed and fingers crossed.

 

[scottau]

Deleted post, solved my own question