From digest.v7.n433 Tue Oct 14 00:36:18 1997
From: Alfred Sutlick <asutlick_at_adnc.com>
Date: Mon, 13 Oct 1997 22:18:12 -0700
Subject: Re: <E30> '87 325es leaking gas tank
Personally, I wouldn't bother attempting to have a leaking gas tank
repaired by use of a sealer, or any other method. When my 6er's tank
started leaking, I asked my good friends at La Jolla Independent BMW
if they recommended any of the sealer kits, or professional repairs.
They said that if the sealer for some reason doesn't fully adhere to
the inner surface of the tank, that it will eventually get sucked
up by the gas pickup assembly and deposit itself around the exterior
of the filter screen. This results in little, or no fuel being
The $800 to replace a seal, quoted by your repair center, is way out
of line. You can buy three new tanks (less associated hardware) for
My 6er's tank developed a leak on the vertical surface at the rear of
the tank, right side, right in the ninety degree bend from vertical to
horizontal (another favorite spot is at the base of the filler neck).
I replaced it with a used tank which started leaking in the exact same
spot within 3 months or so.
I obtained a new tank for something less than $270 as I recall, from
Maximillian Importing. Shipping didn't amount to much. If you get a
new tank, make sure that you also order a new gasket to fit between
the tank and the suction (pickup) device; also the insert that fits
in the filler neck for unleaded gas only.
Also - like Jim Cash mentioned in his letter to you - you may as well
replace the rubber gas lines that attach to the suction device, at the
same time. With the tank down, they're fully exposed.
With a new tank, the filler neck may not align exactly in the center
of the area behind the filler door; you'll be able to tell when you
replace the rubber collar around the neck. If it doesn't center just
right, insert a broom handle in the filler neck and GENTLY give it a
nudge in the direction you want it to go. Don't insert the reducer
for unleaded gas in the filler neck, until you're certain the neck
lines up properly.
San Diego Chapter
'79 635 CSi Euro ('88 535i long block w/L-Jetronic)
'84 528e (wife's)
'91 325i (son's)
Member - U.S. Naval Cryptologic Veterans Association. "In God we trust,
all others we monitor."
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