Fuel line from tank to fuel pump and return lines under the

C

cfcrotweiller

Member
As the title suggest, I need to replace the tank seal and also noticed the fuel lines that run under the car are dangling and parts look like they are leaking slightly (Im sure standing still for 30 years didnt help).
I am going to replace the fuel lines (I think there are 3? - one for main fuel line, one reserve fuel line and one return line?), but not sure what to replace with?
I don't want to use normal rubber fuel hoses as there won't last very long. Any suggestions on a long term solution to this to avoid getting under the car again to replace them?
Cheers
Andy
 
Hi Andy,

There are 3 lines as you correctly surmised. Be sure when you replace them that the internal diameters remain unchanged from the present. I would beg to differ with regards to the use of rubber fuel hose and longevity, although I will add a caveat. The make of hose will definitely determine just how long it will last. I have been using rubber fuel hose made in the USA by Goss between the tank and my electric fuel pump, a distance of only two metres of so, but away from direct engine heat, and it has thus far lasted 23 years. It remains supple and free of any cracks or other forms of possible points of failure. I have seen another brand of fuel hose in a similar location crack and require replacement in less than 5 years after installation.

If you don't wish to use rubber hose, you could always opt for braided lines. Expensive, but in theory they should never need replacing.

Ron.
 
SydneyRoverP6B said:
Hi Andy,

There are 3 lines as you correctly surmised. Be sure when you replace them that the internal diameters remain unchanged from the present. I would beg to differ with regards to the use of rubber fuel hose and longevity, although I will add a caveat. The make of hose will definitely determine just how long it will last. I have been using rubber fuel hose made in the USA by Goss between the tank and my electric fuel pump, a distance of only two metres of so, but away from direct engine heat, and it has thus far lasted 23 years. It remains supple and free of any cracks or other forms of possible points of failure. I have seen another brand of fuel hose in a similar location crack and require replacement in less than 5 years after installation.

If you don't wish to use rubber hose, you could always opt for braided lines. Expensive, but in theory they should never need replacing.

Ron.
Click to expand...


Ron,
Cheers for that. I will ensure internal diameter remains the same for obvious reasons.
I just assumed rubber hoses will be subject to the elements (not exactly heat, apart from gearbox perhaps? More like moisture, water, dirt etc from driving surface. Mine almost look just held under the car by small clamps, so very visible and subject to outside elements). I also have a 323i BMW and needed to replace the hoses after one year (in engine bay however, and I didn't go for the most expensive either - a hint perhaps).
I will look at what sort of hoses are out there, braided are def a consideration but depends on how much more expensive they are..
I like the idea of longevity.
 
How about rubber vs PVC braided hoses (I think the ones on the car are PVC? They are definitely original from discoloration etc). Perhaps a good indicator of longevity?
 
I'd strongly recommend using metal pipes under the car. Too much likelihood of impact damage to use rubber. Standard brake line type kits ought to do the necessary. Currently your pipes are 8mm, by the way. I'm told that if you go much past 250bhp that 10mm are a good idea.
I've gone off rubber fuel hose in a big way ever since I met a batch of pukka good reputation cotton braided hose that broke up internally after NINE months.

Chris
 
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