[W126 Coupe] Huge Fuel Leak

[Markus Meyer]

Henry,

That does sound like one of your fuel pumps.  If you have a 560, it has 2
pumps and one filter.  When I rebuilt my wife's car, I opted to replace all
the hoses, crush washers, and filter.  I had a bad fuel pump too so swapped
it from one out of my parts car.  You will want to crimp the main line
coming out of the tank to the first pump, otherwise, you'll get a nice fuel
bath!

Get the car jacked up nice and stable, that will give you room to work.
Take your time, get the right parts from the dealer, Jonathan, or your
favorite parts source, and get it sorted out.

Actually, you don't need your wife to help.  You can simply remove the fuel
pump relay and jumper the right pins, I forget if its 6 and 7, or 7 and 8.
Look when you pull the relay out, and there are two "rows" of holes where
the pins in the relay plug into.  Its the "opposite" holes that are either 6
and 7 or 7 and 8.  Use a 12 or 14 gauge piece of wire to "jumper" those
holes, and with car not on, the fuel pumps will spin and run.  Then you can
go back there yourself and see what is going on.

Good luck!
Markus

On Fri, Mar 19, 2010 at 2:14 PM, Henry Viveiros <henryviv at oigp.net> wrote:


>  Well, the Hydraulic Pump has been rebuilt and is not leaking. Thanks to

> all who gave information and especially to Mike Ramay with his pictures and

> details.

>

> This morning the car has developed a huge fuel leak. It is coming from what

> I think is a fuel pump which is by the passenger side rear wheel. The part I

> think it is leaking from is a cylindrical metal canister that has two wires

> going to it, a steel line between the wires and a rubber hose connecting on

> the opposite end. It is held to another cylindrical part by a clamp.

>

> I have to wait until my wife gets home so she can turn the key and maybe

> start the car so I can see where the fuel is coming from. The end of the

> cylinder is cracked and may be the cause of the leak. If it is, is that the

> fuel pump. If I have to replace it, are there any other items that should be

> replaced at that time.

>

> I am much more of a novice than a DIYer, but I enjoy working on the car and

> actually enjoyed the hydraulic pump repair. The shop wanted $1,300 for a new

> pump plus labor. I got it fixed for about $20.00 and a couple of hours time.

>

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> Postings remain property of MB Coupes, L.L.C.

>

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