Best way to identify source of fuel leak?

[AC_Schnitzel]

I think I might have found the source of the leak...

This is the supply line to the fuel rail — previous owner had it replaced w/ this at some point.

Haven’t started the car yet to confirm, but take a look:





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[D.Martijn]

Is it the "Not for fuel injection systems" that you are talking about?
When you google, 30R7 which is printed on the hose, it says it's rated at 50psi (3,5 bar).
The fuel system on the E30 only works at about 3bar so those lines should be good.

[AC_Schnitzel]

Is it the "Not for fuel injection systems" that you are talking about?
When you google, 30R7 which is printed on the hose, it says it's rated at 50psi (3,5 bar).
The fuel system on the E30 only works at about 3bar so those lines should be good.

Ah yes. I thought I was onto something...

Anyhow, 5/16 EFI line at local auto parts store is more expensive by the meter than on FCP.


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[D.Martijn]

Ah yes. I thought I was onto something...

Anyhow, 5/16 EFI line at local auto parts store is more expensive by the meter than on FCP.


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You can always replace them so you are 100% sure it's not the lines.
I replaced my fuel lines yesterday and I paid 27€ for 3 meters of line at my local parts store. Beats having to wait for it to arrive though.

[AC_Schnitzel]

You can always replace them so you are 100% sure it's not the lines.

I replaced my fuel lines yesterday and I paid 27€ for 3 meters of line at my local parts store. Beats having to wait for it to arrive though.

So I found the source of the leak — it is in fact at the junction of the supply hose here:



It might be that whoever installed the line used the wrong clamp...

Gonna change out the lines anyway.

Thanks everyone for your help!