Mercedes 280ge W460 Fuel leak near filter. What part do I need please?

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Gibson
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Hi,

 

I have a fuel leak at the rear of the Merc and its on the pipe that goes from the fuel tank to the fuel filter (I have tried to attach a photo showing it the best I can)

what part would I need to replace this please? Is it something I could do myself If i drained the tank of fuel and disconnected battery? If so what should I look out for when doing it?

(ignore tin foil was put in as a very temp fix to get us back up the road to home!)

Thanks in advance for anyhelp :)

Kind Regards

Joe

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Arnie
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

 

The job is easy enough to do. But ALL your pipes in that area look to be in bad condition and I would advise to order a full set of pipes and hoses from your local MB dealer parts dept. And while you are at it, a new filter, if it's never been changed. You may need to drop the tank to access the hose connections on the top


Also check the condition of the two steel straps that retain the fuel tank in case they are equally corroded.

And, if your fuel-pipes are that bad, the brake lines might warrant a check.

 

 

prwales
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...
The design of the w460's tank and exhaust system left a lot to be desired. Exhausts were routed over the top of the steel fuel tank, this required protection from heat and came in the form of [I presume asbestos] cladding. This cladding holds water and perhaps as a consequence of said moisture and the heating cooling cycle from the adjacent exhaust created perfect conditions for corrosion. Rust was top down and usually included all the pipe connections to the pump and filter. Best to take the tank off, secure it from falling via the access panel in the centre of the boot floor and loosen off the steel straps which as mentioned above are probably rotten too. Take great care not to get petrol into your eyes or ears when carrying out this task
Arnie
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

prwales wrote:
...[I presume asbestos] cladding. ...


I think this was Glass-Fibre based. 


But, everything else is correct. Not the best design. The steel tank may also need a check for leaks.

prwales
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

I think you're right with some kind of foil backing, its been a long while since I had a w460 but the pleasures of petrol in my ear is a pain never forgotten.angry 

Only when the tank is dropped and inspected can you really tell what remedial work is required, corrosion of the tank itself is much more difficult to fix for a petrol tank than for a diesel because of the explosion risk when welding but feeding exhaust gas in might work, if the tank hasn't corroded from the top don't assume all is well, as the seams often leak, and its quite common for the owner to be unaware of the extent of the problem especially if they don't brim the tank very often

Nick Norris
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...
Northern Radiators, Leeds, repaired mine years ago and did a thoroughly excellent job. I would not countenance the thought of anyone not set up for it tackling the job. A big boom is likely to ensue.
consur
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

When my 280GE was done the metals expert filled the tank with water to eliminate explosion risk.  The main leak points were at the filler necks (plural as accessory tanks present) where water and dirt had been trapped between the rubber hoses and the metal causing several tiny holes.  Glass fibre chopped strand mat in multiple layers stitched together with s/s wire, then a piece of heavy duty aluminium foil from one of those disposable charcoal barbecue trays on top has made a good insulation layer over the tank where the exhaust pipe goes.  If you are giving the tank to someone else to fix, you are best to remove the fuel tank fill sender gauge as all the movement of the tank turning it on its side, upside down etc, without the damping effect of fluid within it will send the float up and down etc and the thin wire in the gauge will probably break as it's quite fragile.  Replace the protection plate over the pump on the front of the tank using some stainless bolts would be another tip learned from experience and will speed up access to the pump in the future.

jdring
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

Repairing tanks all seems a lot of work coupled with risk of booms if welding.  Why not just replace with a replacement plastic tank and be done with it.  Might cost a bit more than the welding/repair but your get more peace of mind?

 

prwales
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

agree the problem is gone for good but need to add the cost of re routing the exhaust, which is a good idea anyway even if you chose to repair your steel tank, as the convoluted rout it takes of the fuel tank is bonkers

Gibson
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

Thanks for all the replies! 

First off what size is the Allen Key to drain the tank? Its massive!

Kind Regards

Joe

consur
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

Just use a suitable bolt or a nut with some scrap welded onto it.  Here's one I made earlier.

consur
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Re: Mercedes 280ge W460 Fuel leak near filter. What part do ...

And here's what I used to get the sender unit out although I can't remember whether it was the 46 or 50 mm end that's the right size.