you noticed erratic readings from your fuel gauge? Are you puzzled when
after filling up your tank the gauge reads only half full? Chances are, the
sending unit is kaput. The good news is that pelican carries replacement
senders for your E36 BMW. Replacement of the senders is relatively easy, but
keep caution, as you will be working around raw gasoline.
this tech article, we will discuss replacement of the two fuel senders on
the E36. The first step in replacing the senders is to disconnect the
battery. Electricity and gasoline do not mix. Failure to disconnect the
battery can result in an explosion.
drain the fuel tank; this can be done from under the car. You will also want
to remove the fuel filler cap to relieve pressure on the system.
access the fuel senders on the E36, it is first necessary to remove the rear
seat bottom cushion to gain access to the senders. To remove the cushion,
simply pull up on the front of the cushion, it will release from its
mounting clips. Then, pull the cushion forward and out. Place the seat
cushion in a safe place. Next, itís a good idea to cover the seat back
cushion to protect it from fuel spilling or splashing. After the seat backs
are covered, pull back the insulation pads on the bottom where the bottom
should now see the two access ports for the fuel senders. Now remove the
screws holding the access covers. Once removed, you will see the various
fuel hoses and electrical connections for the senders. Now is a good time to
label the connections and fuel hoses so you remember where they go when you
install the new senders.
disconnect the electrical connections and fuel hoses to the senders. With
all the connections removed, you will see that a threaded collar assembly
holds the senders in place. Using two screwdrivers, very carefully rotate
the collar to remove it. Once the collar is removed, it is now possible to
remove the fuel senders.
you start to remove the fuel senders you will notice the fuel pump attached
to the unit. You may find it easier to remove this sender by pushing the
fuel sender arm towards the fuel pump. Once both senders are out, remove the
old sealing ring and trash it. Allow any fuel in the senders to drain into
the tank before removing them completely.
install the new senders, first install a new sealing ring on either side,
then carefully install the new fuel senders, taking care that they are lined
up with the fuel hoses and electrical connections that you removed earlier.
the new senders in place, carefully re-install the threaded collar around
the sender and using two screwdrivers, lock it in place.
re-install the electrical connections and fuel hoses. Be sure that the hoses
are correctly installed. Now fill up the tank with at least 2 gallons of
gas. This will prevent damage to the new senders and the fuel pump when you
start the engine.
re-connect the battery and start the car. It may take a few times to get it
started due to air in the lines, but keep cranking it until it starts. When
it starts, check for leaks. If everything looks tight and there are no leaks
in the system, re-install the access covers in place and tighten the screws.
the insulation pads back in place over the access covers, then re-install
the rear seat bottom cushion by pushing the rear portion in first, then
pushing down on the front section to lock it in the mounting clips.
Well, there you have it - it's
really not too difficult at all. If you would like
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