Fuel line replacement

[DKL]

I'm replacing the old rubber fuel pipe on my car as its split. I've bought a length of steel braided ptfe pipe but I seem to be having issues getting the 2 ends to seal. Both simply slide over a fixed copper pipe (tank and engine) as the old one did but I can't get it to be a strong enough junction with the clip (looks like a stock jubilee clip to me but they will be the originals from the factory).
The ptfe centre seems stiffer than the rubber and it only just slides over the copper pipe. Should I :
use something else
Strip the braid off for a few cm and fit the clip to the ptfe only
Fit some sort of or O ring or similar to make a seal
or
something else?
All suggestions gratefully received.
Thanks

[E-bmw]

Why did you change to Braided/PTFE lined?

As you have found, it isn't ideal as even if you had it a bit bigger to go on easier, you will then have the issue of compressing it with the hose clamp to seal & that will be equally difficult.

BTW, you shouldn't be using Jubilee clips on fuel line, use these instead, they close up more evenly.

https://www.ebay.co.uk/itm/MINI-FUEL-LINE-304-STAI...

[DKL]

My impression was that this was the best stuff for the job and as its pennies really it seemed pointless to skimp. But maybe not.
I've ordered some rubber tube too now so I'll see what works best.
The point about the clips was that this is what was fitted from the factory it seems. Mind you they have held for 22 years.
More have been ordered anyway.

[Coilspring]

DKL said:

My impression was that this was the best stuff for the job and as its pennies really it seemed pointless to skimp. But maybe not.
I've ordered some rubber tube too now so I'll see what works best.
The point about the clips was that this is what was fitted from the factory it seems. Mind you they have held for 22 years.
More have been ordered anyway.

How long are the sections you are replacing?

I would use metal fuel line for the longest, and most exposed underfloor sections, and then flexible fuel hose for joining the sections, allowing for the flexibility needed of the engine/suspension movement.

[227bhp]

That kind of pipe needs a compression fitting, or was heat shrunk on in the factory, not an external pipe clip.

[DKL]

227bhp said:

That kind of pipe needs a compression fitting, or was heat shrunk on in the factory, not an external pipe clip.

Having spoken to a local co that does appear to be the case. In many ways it would be the better option but would need proper terminations and also the hard pipes on the car would need changing too.
So more rubber pipe duly ordered.

[HealeyV8]

The centre of the braided line is rubber (or plastic type) material but you say it is tight and you can't get it far enough onto the copper pipes. I'm sure you've tried this but just in case put the end in boiling water to soften it up before sliding it over the copper pipe.

[DKL]

HealeyV8 said:

The centre of the braided line is rubber (or plastic type) material but you say it is tight and you can't get it far enough onto the copper pipes. I'm sure you've tried this but just in case put the end in boiling water to soften it up before sliding it over the copper pipe.

By "only just slides over the copper pipe" I meant it's a snugg fit but it does slide on with a little lubrication. But really this sort of pipe needs proper olive based screw fit terminals and so obviously the car must have the same. It doesn't and you can't compress the pipe to get a seal that holds 2 bar.
So thanks for the advice, it would be sensible if it turned out to be the problem but sadly I don't think it is.