Fuel lines

[thatphysicsguy]

Hey all, doing a large service to the b25 soon and I was wondering what size/spec of fuel hose the car needs? Are there different sizes across the car? or is there one size used pretty much universally?

I want to buy a roll of hose and cut it to length for each of the applications if possible.

[RUFFLZ]

in to get schooled on this.

just bought a couple meters of BMW 8x13 hose to take out a couple lines, anyone have a diagram of what else I would need?

realoem's diagram is pooey

[FLG]

Hit up Levent at guten parts he has brand new hard line for the entire car for super reasonable and can also supply you with the rubber line.

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[MR 325]

The soft line is 8mm or 5/16" but make SURE it's rated for fuel injection. Not just fuel hose.

[dougie30]

I went to autozone and asked for high pressure rubber fuel line and I just cut it to length and used two barbed fitting with hose clamps, has been working for about 3 months no problems.

[jeffnhiscars]

I bought 5 meters of FI rated hose from autohausaz. It's made by Conti who makes a ton of OE parts, costs about $30 and is enough to do 2 cars under the hood.

[thatphysicsguy]

The soft line is 8mm or 5/16" but make SURE it's rated for fuel injection. Not just fuel hose.

so it works for the soft lines in the back by the fuel filter/fuel pump too? or could those be different sizes?

[FLG]

From tank to pump is diff size if early model.

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[jeffnhiscars]

the pump to filter hose is molded in a U. Ive gotten by with a standard piece of hose but it wants to kink.

[TobyB]

...but yea, on a late car, all the fuel line will be 8mm/ 5/16".

On an early car, you'd need some 12mm from the tank to the
HP pump. A little more/ less than a meter?


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