Author Topic: Fuel tank drain  (Read 1530 times)

mazmonza

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  • 1967 250sl zf 5 speed. colour 172 anthracite
Fuel tank drain
« on: May 01, 2020, 14:27:10 »
What is the way to drain the fuel tank prior to removing fuel pump? ???
1967 250sl ZF 5 speed
1991 300ce-24 coupe Sportline
1962 Lambretta TV175/ RB20
2000 Ducati 748s
1970 Ducati Monza

mrfatboy

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Re: Fuel tank drain
« Reply #1 on: May 01, 2020, 16:06:33 »
If your fuel hose is not old and brittle you may just be able to clamp it without draining the fuel tank.  That's what I did.

If you do want to drain the tank there is a Allen screw at the bottom center of the tank.  Look in the tech manual for how to build a tool if you dont have the correct size Allen wrench.
« Last Edit: May 01, 2020, 16:20:14 by mrfatboy »
1969 280sl (Aug 1968 build)
Signal Red
4 Speed

wwheeler

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Re: Fuel tank drain
« Reply #2 on: May 01, 2020, 16:14:08 »
Yes, hose clamp tools are available at most auto stores and are cheap. I think you can also remove the fuel sending unit and siphon most of the fuel out. From there, remove the drain plug and it won't be as dramatic as when the tank is full. Be careful around gasoline vapors!!!!!!!
Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6

Dave H

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Re: Fuel tank drain
« Reply #3 on: May 01, 2020, 16:19:51 »
Clamp and plug the hoses.
Mercedes 250SL    1967
Mercedes 250SLK  2014
Alfa Romeo 166 3.2 Ti
Fiat 500

mrfatboy

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Re: Fuel tank drain
« Reply #4 on: May 01, 2020, 16:23:29 »
If using vice grips you can place two sockets on the tips of the jaws. This will create a nice smooth pinching surface as not to damage the hose. 👍
1969 280sl (Aug 1968 build)
Signal Red
4 Speed

Dave H

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Re: Fuel tank drain
« Reply #5 on: May 01, 2020, 17:31:46 »
Nice tip with the 2 sockets, I like that 👍
Also if you have the T Piece bypass as I do in the photograph ensure you clamp both hoses at the same time  otherwise the tank will drain out of the other .
Mercedes 250SL    1967
Mercedes 250SLK  2014
Alfa Romeo 166 3.2 Ti
Fiat 500

mazmonza

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Re: Fuel tank drain
« Reply #6 on: May 01, 2020, 17:46:49 »
Thanks for the advice, I used a G clamp,pump is off now. :) :D :D ;D
1967 250sl ZF 5 speed
1991 300ce-24 coupe Sportline
1962 Lambretta TV175/ RB20
2000 Ducati 748s
1970 Ducati Monza