LTe

I need to drain the gas out of my tank, is there a drain plug on these things or am I going to have to stick a clear hose down the fill tube and siphon it out?

Its about a 1/4 tank of gas that needs to come out. I didnt really see a drain plug but there is also a skid plate under there.

tusabes

Why do you need to drain the gas out ? If its old gas, just fill it with fresh gas and use it up

If you put diesel or water or something in it , the tank needs to come out. There is no drain hole

fxdeebee

Not necessarily, dive under car, black plastic cover next to left side resonator. Pull cover, exposes fuel pump and filter. Pump is smaller and outboard of filter. Rear end of pump is the pick up tube from the tank. Clamps to the pump body. Remove clamp, pull hose off pump and drain away. May have to extend that hose down some with piece of fuel line and siphon to get the dregs from the sump in tank.


We are talking open gas here, so appropriate cautions need to be taken. Eye protection not the least of these.


A lot easier than pulling tank.

LTe

That's a good answer, I'm going to use the pump though, I have DAS/Xentry and I am just going to activate the pump and let it pump into a gas can. I was also told there is a nipple at the fuel rail and it can be drained from there too so I might try that. Using a fuel pressure guage but just using the hose only and having it pump into a gas can from there.

Problem is, I have no time to do it right now. It will have to wait.



However I did not know these were externally mounted fuel pumps, I thought they were in the tank. That's good to know for future reference.

fxdeebee

Thought of that too, but didn't know reason for tank drain, i.e. crud plugging it, accidently dropped a small animal into it... you know, stuff that wouldn't do well going thru the pump/filter/injector rails


Good luck and carry on

Flydutch

Hi guys.
On my 2003 S55 AMG Kompressor (w220)the tank at one stage partly collapsed due to a vacuum problem. I "Pumped" it up but in the process it sprang a leak 2/3 up right in the middle. I have tried about everything recommended to plug the hole but time and again due to these aluminium tanks are being so "Weak" the slight movement between empty and filled up wriggles the "Patch" loose. I now want to take the tank out completely and have it properly welded. (Some guys know how to do this by first neutralising the vapour) I need however some advise/procedure, preferably with pictures of the arrangement of pipes around the tank, how to take the tank out. Searching the web so far got me nowhere.

mercy-me

There are ways of patching an aluminum fuel tank per a cursory google search but the obviously better permanent fix is to have it welded. No doubt, this is thin metal so even welding may be a challenge. Myself, I would exhaust the patching route first.

However, should you decide to remove the tank for any reason, attached are the WIS instructions. (seems fairly straight forward)

Good luck,

Bob

wallyp

Eastwood sells an elastomeric goop that will seal rust holes in steel tanks. I'll bet it would seal your leak. Still requires you to take the tank off, though. You take the tank off, dry it out, pour the goop in and rotate the tank in all directions, then pour the goop back into the can. Let dry, reinstall.

Flydutch

Thanks Bob,
Took the plunge and stripped out the tank last night, (Not as easy as it appears, lot of things in the way), but your pictures help a lot. Now to wash it and then weld it up. Have some contacts here at the Power Station we are building is South Africa who can do very specialist aluminium welding. Will let you know the result. As said got tired of the glue goodies as first all we get limited types here in the RSA and the best I could get still "Wriggle" loose in time. (Mechanical and thermal differential deformation)
Cheers
Len

Flydutch

Hi Wally,

First of all we do not get all that stuff in South Africa. Secondly these tanks are full of compartments so I think pouring in, rolling around, drain and "Bob is your Uncle" is not going to work.
As in my reply to BOB I took the plunge and stripped out the tank for welding.
Thank for your input anyway.
Cheers,
Len