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Old 17-09-2021, 20:28   #1
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Rebuild fuel lines with copper brake line

I am going to rebend and repalce all my fuel lines, except the fuel rail which has soldered banjo fittings, with copper/nickel brake line and a flarring tool, can get 25 feet of line on ebay, I was wondering if anyone else has done this, and carry extra for spare
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Old 17-09-2021, 20:49   #2
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Re: Rebuild fuel lines with copper brake line

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Originally Posted by toerail View Post
I am going to rebend and repalce all my fuel lines, except the fuel rail which has soldered banjo fittings, with copper/nickel brake line and a flarring tool, can get 25 feet of line on ebay, I was wondering if anyone else has done this, and carry extra for spare
You talking about a boat with diesel fuel?

Nothing wrong with copper (or copper-nickel) for the rail between injectors. That's because diesel fuel does not sit stagnant in that rail (unless you leave your engine unused for a long time).

Copper fuel tanks and long copper fuel lines, in which diesel fuel can sit stagnant, might be a different question.
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Old 20-09-2021, 05:07   #3
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Re: Rebuild fuel lines with copper brake line

Brake tubing tends to be rather small diameter, given the small amount of hydraulic fluid that needs to be moved a short distance in automotive brakes. That means considerable friction in a longer and higher volume situation. That means that you lift pump has to work harder. You might consider the next size up in copper tubing.
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Old 20-09-2021, 06:05   #4
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Re: Rebuild fuel lines with copper brake line

I agree completely with the above posts.
The green frog and the naked (who is that suppose to be? )poster, both are great advice.
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Old 20-09-2021, 08:01   #5
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Re: Rebuild fuel lines with copper brake line

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Originally Posted by tkeithlu View Post
Brake tubing tends to be rather small diameter, given the small amount of hydraulic fluid that needs to be moved a short distance in automotive brakes. That means considerable friction in a longer and higher volume situation. That means that you lift pump has to work harder. You might consider the next size up in copper tubing.

If you keep the line the same length and of the same interior 'smoothness' and halve its inside diameter, you'll quadruple its losses from friction at the same flow rate.
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Old 23-09-2021, 19:27   #6
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Re: Rebuild fuel lines with copper brake line

I think it was in 3 sizes, will check it out. Especially since perkins says no parts available for my engine any more, and it would be nice to be able to make one, they damage so easy
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Old 23-09-2021, 19:40   #7
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Re: Rebuild fuel lines with copper brake line

Cant you just use fuel hose?
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Old 23-09-2021, 19:49   #8
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Re: Rebuild fuel lines with copper brake line

https://www.new-line.com/hose/automo...fuel-line-hose
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