'89 100 fuel pump

[Kneale Brownson]

There SHOULD be a cover over the access hole to the top of the fuel tank.
That cover should be in the center of the trunk just in from the bulkhead
to the rear seat area.  Usually a couple of Phillips head screws.  Once the
cover is off, you'll see the tabs on the lid Andrew described.  I have a
brass punch and hammer I use.  It screws off "normal" (as in lefty loosy,
rightie tightie).  There's a rubber O-ring sealing the cap to the opening
in the tank and you want to be sure that gets back in place when you put
the cap back on.  The pumps with rubberish anchors have a triangular piece
of plastic clamped to them with rubber inserts in each corner that slip
over three mounting posts bolted to the bottom of the tank.   I got the
rubber bits off the posts by putting my thumb on top of the post and
pulling with two fingers around the rubber bits.  I've had the plastic
triangle become disconnected from the rubber, leaving the rubber on the
mounting post.  In that instance, you need to get the rubber bit off the
post and reinsert it into the triangle to install the new pump.

At 11:24 AM 8/31/2005 -0400, Andrew Duane wrote:
>BTDT with mine.
>
>Take up the carpetting in the trunk and you will see an access cover,
>about a 4" diameter circle with some little tabs for opening.
>My preferred "opener" was a hammer and a small block of wood wedged
>against one of the tabs. DO NOT USE METAL ON METAL TO OPEN!!!!!!!
>The cover also has some plumbing and the level sender attached.
>Be careful with all of that.
>
>Reach right down in and there is the pump, just unfasten it from the
>little rubber standoffs it sits on.
>
>This is best done with the smallest amount of fuel in the tank you
>can manage. But it is still a FOUL job in that trunk full of fumes.
>
>Hairy green toads from Mars made calvink at fastermac.net say:
>> I have an '89 100 that I'm probably going to put up for sale
>> soon, but first, I need to replace the fuel pump. Unlike the
>> 90 and 4000, it's in the tank.  Do I have to drop the tank
>> to replace it, or did the Audi engineers kindly provide an
>> access panel in the floor? 
>> 
>> Calvin Krug
>> Indianapolis
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>
>-- 
>
>Andrew Duane            Member Technical Staff - SPG
>SavaJe Technologies     andrew at savaje.com
>100 Apollo Drive        p: 978.856.4943
>Chelmsford, MA 01824    f: 978.256.8386
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