1991 320i Leaking fuel tank - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 08-06-2004, 05:30 AM
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Hi,

I recently purchased a 1991 BMW 320i, and everything seemed to be fine UNTIL
I went to fill her up. As the attendant was filling up the tank he pointed out
to me with some alarm that petrol was streaming out from underneath the car.

I took a look and to my horror observed a steady stream of fuel flowing out
from somewhere underneath the area of the rear pasenger door.

The car is fine as long as I fill it up to less than 3 quarters full, after that
it overflows. It doesn't seem like a small hole or anything because the fuel
leaks out at a very rapid pace. I suspect some sort of cracked hose or something,
but why would it only leak after 3/4 full ?

Does anyone have any ideas where the leak could be, presuming there is not
a physical hole in the tank itself ?
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#2 (permalink) Old 08-06-2004, 11:44 AM
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Best thing to do is lift it up and get look for yourself. Otherwise its all guesses....good luck with that.

Finally pulled the M50 from the donor car.
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#3 (permalink) Old 08-06-2004, 12:33 PM
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yah he is right, it culd be that the tank is on different levels so that the bottom holds 3/4 a tank but after it gets up to the level where the whole is...it leaks then...i hope that makes sense, thats what im thinking...


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#4 (permalink) Old 08-07-2004, 11:14 AM
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I had this problem too. Remove the rear seat (the lower part). Remove the lining there. After that you should see a metal lid attached with 4 screws(this is just right above the tank). Undo the screws, remove the lid. There is the place where is the fuel leak. I don't know how to fix it because i had it fixed for me but it must be something with the pipes that go in there.

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It seems they wanna finger print me and gimmie some years
They'll only get 1 finger while I'm shifting gears
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There's no replacement for displacement.
I need to know!
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#5 (permalink) Old 08-07-2004, 12:16 PM
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wow that blows man, if its that big of a deal...thats a defect in bmw...something i have heard very rare...


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