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Ok I admit it the gas tank scare's me.. Help


Guest Aguyandaredhead

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Guest Aguyandaredhead

Ok there is not much I won't att. myself, but I think I have to draw the line here. I am wanting to have a fuel sump added to my stock tank on my 72 240z. I am thinking of using the Aeromotive sump that they use in their tanks they sell, I have seen them for sale and I think this would be a perfect setup for my RB conversion.

 

Here is where it gets tricky, I am not going to weld on my tank. I have heard all the how to's on doing this and I am just willing to pay someone else to do it. You know the pump exhaust into it to purg it and the fill it with water, then thers the dry ice trick. Well I am out, so I need some ideas on where to call to see if anyone will do this for me. I wonder if a Radiator shop would be able to do it? I am including a picture link of what I am talking abut so you can see it for yourself. If you have any Ideas let me have it. I have already thought of a Cell I just want the benifit's of the stock location and filler neck..

 

 

http://hybridz.org/nuke/modules.php?op=modload&name=coppermine&file=displayimage&pos=-345

 

 

Help a guy out..

 

Thanks

Jeff

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Local fab is hard to find unless you live in LA. You never know what a guy that claims to be a welder, or even a fabricator will do quality wise.

 

As far as concern about the residual gas fumes - what about just taking your tank in to a radiator shop to get boiled out? Won't be any fuel left in it after that process.

 

My grandfather used to weld up tanks with the fuel still in them. A little bit too sure of himself I think. His point was that the liquid is not flammable, it's the fumes. Which is true, and yet....

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I welded my 240Z tank up with no problems...though I was a bit nervous about it.

 

I called the radiator shop up and asked them if they would boil it out and then i would weld it up and take it back to boil it again. they said that that wasnt really necessary and I could easily wash it out myself. so i did.

 

I drained the tank first, and the let it sit under my back porch for a week, then I filled it with dish washing soap and sloshed it around, drained and repeated a couple of times. after that I drianed it again and let it sit out for another week. I was still a little leary about cutting and welding on it, but I st6ill have all my fingers and hair....so I guess it turned out alright.

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Guest Aguyandaredhead

Big Brass @!(('# thats what I say. Thanks Bill let me know if you hear of where to take it. The thing about washing it out is the metal still give's off vapor from the gas it has soaked up..So even if you wash it repeatably it will still off gas flamable vapors.

 

I wish I felt safe to do it myself, I hate to pay anyone else to weld it on as I am sure I could do a bang up job..

 

Jeff.

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Ive sumped 2 tanks with no problems.All I did was wash them twice and stuck a shop vac into the opening for the sending unit and removed the cap.Scariest part is cutting the tank for the sump,once the tanks cut it wont explode.Give it a thorough clening and it will be safe.If you choose to pay someone,I'd go to a fab shop over a radiator or muffler shop anyday..

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I've welded on tanks before by draining it completely, then hooking it up to the exhaust of another car and running exhaust gas through it for about 10 minutes. That should neutralize all the vapors. If you're really paranoid, rinse it with diesel, then with degreaser.

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3 words - Castrol Super Clean - It's a great degreaser that you can get at the auto parts store. Just take the float assy out of the tank to protect it and them hose the inside of the tank down with Super Clean. Slosh it around for a while and then drain and rinse a couple times. There won't be anything left on the metal after that stuff is done with it. Just be careful when using it on aluminum parts. I have done 3 240Z sumps now using this method with no problems. I TIG the sump on - it does a nice job. I also don't cut out the bottom of the tank in a square, I just drill a pattern of large holes with a unibit and weld the sump on.

 

No Worries - Doug

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Jeff, the guy here at work that knows at least one guy for any task at hand dealing with cars has no one. He said that radiator shops used to but don't want to deal with them anymore. Looks like you might be on your own. Let me know if I can help out in any way, would be interested in learning :)

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