Topic: welding on a used fuel tank..... (Read 14005 times)

ratcityrex · « **on:** April 09, 2014, 12:06:06 PM »

So I'm needing to weld my sump pan onto my gas tank on my nova. It's had gas in it b4 so I'm just curious how many of you crazy fuckers have tried this.

Googled it and pretty much got the same response everywhere which is take it to a radiator shop. Fuck that noise...... what have you guys done?

PhilStubbs · « **Reply #1 on:** April 09, 2014, 12:43:13 PM »

Pump some argon in there. It will push the oxygen out. Can't blow up with no oxygen.

I have also heard you can fill with water just short of the weld. I'd go argon though.

crxvtec91 · « **Reply #2 on:** April 09, 2014, 12:45:08 PM »

Drain it, let it air vent for a day or 2. Once it looks dry, pump some exhaust fumes into it while you work on it. The carbon will push out all vapors and make sure it wont light.

ratcityrex · « **Reply #3 on:** April 09, 2014, 01:01:26 PM »

Been talking to malachite he's gonna tig it for me. (I'm gonna hold the camera while he blowes himself up) Says he's got a good handle on how to do it. He said he's gonna take a torch to it and let it burn itself out first and then fill it with argon while he welds it.

n/a mike · « **Reply #4 on:** April 09, 2014, 01:51:03 PM »

Definitely post that video even if it's just a little pop that scares you guys.
yer gonna die!!!

On topic, I've heard of using water or argon.
you guys should try filling it with acetylene

ratcityrex · « **Reply #5 on:** April 09, 2014, 03:08:56 PM »

Lol oxyacetylene is fun. We use to fill 30 gal garbage bags up and drape toilet paper across it and light it....lol we did 12 bags piled up on top of each other one year for the 4th of july. The explosion Took the 4"x4" ceramic tiles off the neighbors bathroom walls.

highroller54 · « **Reply #6 on:** April 09, 2014, 05:17:45 PM »

Drain it, hot water hose and dish soap, run for a bit, drain it never had a problem.

ratcityrex · « **Reply #7 on:** April 09, 2014, 07:14:08 PM »

Quote from: highroller54 on April 09, 2014, 05:17:45 PM

Drain it, hot water hose and dish soap, run for a bit, drain it never had a problem.

good to know someone has had some experience welding on tanks. Ryan said hes welded on propane tanks and didn't have any issues.

DSharp · « **Reply #8 on:** April 10, 2014, 03:39:33 PM »

I've welded up a sheet metal gas tank that had a leak. All I did was pour out all the gas and rinse it out with water real quick.

malichite · « **Reply #9 on:** April 10, 2014, 10:59:40 PM »

This should be a non issue, Or I will soon be starting the second RHMT Home build thread......

Buckaroo Banzai · « **Reply #10 on:** May 20, 2014, 10:44:54 PM »

Hook a hose up to the exhaust pipe of a running car and pump the tank full of carbon monoxide to displace the oxygen so no boom and weld away. And ask Ryan if by some miracle he still has the eg si tranny I gave him years ago.

n/a mike · « **Reply #11 on:** May 20, 2014, 11:20:21 PM »

You motherfuckers blow up yet?

ratcityrex · « **Reply #12 on:** May 21, 2014, 12:05:36 AM »

Nope, not yet. Haven't even pulled the tank. I will probably after summer. At this rate I might not even sump it. If I pick up a used chevy that's got a intank pump I might try and mod that to work.

dvst8r · « **Reply #13 on:** May 21, 2014, 09:16:12 AM »

Steel typically really doesn't soak up much of the contained substance. As such as has been said, a good wash with some dish soap and water is enough to make it safe.

The scary ones are Aluminum and Cast Iron. They are both very porous materials and can hold a lot of the contained substance.

highroller54 · « **Reply #14 on:** May 21, 2014, 09:59:21 AM »

They only blow up in the movies.

danz · « **Reply #15 on:** May 25, 2014, 02:09:25 PM »

They only blow up when they are empty. Fill it with water, rinse it out, fill it with water, rinse it out, fill it with water, weld it.

sewell94 · « **Reply #16 on:** May 25, 2014, 06:37:12 PM »

Old school crazy motherfuckers will fill them with gas and weld them up. NO BS. Seen a guy do that on a motorcycle tank, I was around the corner of the building taking quick peeks though. Duck That....

ApexSilver06MR · « **Reply #17 on:** May 26, 2014, 06:01:08 AM »

Quote from: sewell94 on May 25, 2014, 06:37:12 PM

Old school crazy motherfuckers will fill them with gas and weld them up. NO BS. Seen a guy do that on a motorcycle tank, I was around the corner of the building taking quick peeks though. Duck That....

Where the fuck have you been?
\

Tim · « **Reply #18 on:** May 26, 2014, 12:58:38 PM »

I tried to light one half full once. It would only make a tiny puff of fire then smother itself and go out.

sewell94 · « **Reply #19 on:** May 26, 2014, 01:27:16 PM »

Quote from: ApexSilver06MR on May 26, 2014, 06:01:08 AM

Quote from: sewell94 on May 25, 2014, 06:37:12 PM
Old school crazy motherfuckers will fill them with gas and weld them up. NO BS. Seen a guy do that on a motorcycle tank, I was around the corner of the building taking quick peeks though. Duck That....

Where the fuck have you been?
\

I'm not quite sure to be honest, Time to bring this MOFO back.

danz · « **Reply #20 on:** May 31, 2014, 03:12:58 PM »

Lol... I had this wagon EF that was beat to fuck and back... had a hatch exhaust on it that cracked the tank...

Busted out the mig one day after filling the tank right up with gas, welded that fucker shut. It burned a little for like 2 seconds but theres so much "liquid" in there it just sucks the heat out of the weld and it cools right down. Never leaked again. No drama.

DraginX · « **Reply #21 on:** June 05, 2014, 09:33:07 PM »

Quote from: danz on May 31, 2014, 03:12:58 PM

Lol... I had this wagon EF that was beat to fuck and back... had a hatch exhaust on it that cracked the tank...

Busted out the mig one day after filling the tank right up with gas, welded that fucker shut. It burned a little for like 2 seconds but theres so much "liquid" in there it just sucks the heat out of the weld and it cools right down. Never leaked again. No drama.

How did you manage to get under the car with a set of nuts that big??

danz · « **Reply #22 on:** June 07, 2014, 03:01:17 PM »

Honestly, motivated by being cheap and wasting fuel. Whats a little skin burn if money is saved?!? haha.

DSharp · « **Reply #23 on:** June 11, 2014, 12:43:59 PM »

Quote from: DSharp on April 10, 2014, 03:39:33 PM

I've welded up a sheet metal gas tank that had a leak. All I did was pour out all the gas and rinse it out with water real quick.

The tank I'm talking about was aluminum and empty

still smelled a little like gas too!

If the cap is off I don't think it would build the pressure it needs to explode. Ever lit a beer bottle partially filled with gas on fire? No? Try it sometime.

n/a mike · « **Reply #24 on:** June 12, 2014, 12:46:17 AM »

Quote from: DSharp on June 11, 2014, 12:43:59 PM

Ever lit a beer bottle partially filled with gas on fire? No? Try it sometime.

did you know you can boil water in a plastic bottle on a fire and the bottle won't melt
not sure why, but your post reminded me of that for some reason.
http://youtu.be/DcsaW4whkR0

DraginX · « **Reply #25 on:** June 15, 2014, 09:07:46 AM »

Quote from: danz on June 07, 2014, 03:01:17 PM

Honestly, motivated by being cheap and wasting fuel. Whats a little skin burn if money is saved?!? haha.

Well I guess...lmao What's 4 months in the hospital in excrutiating pain if you saved $130....lol

jabberwock · « **Reply #26 on:** June 15, 2014, 10:26:33 AM »

Been there, except they try to get you out of the hospital asap in the case of burns because of the open wounds. I had 2nd deg burns to 30% of my body, basically everything not covered by shorts and t shirt. This was a couple years ago, i still can't go out in the sun for more than an hour even with spf 50. I wont be fucking around with gas anymore

DraginX · « **Reply #27 on:** June 15, 2014, 09:30:12 PM »

That would suck big time.

ratcityrex · « **Reply #28 on:** June 15, 2014, 09:42:54 PM »

I'll sump it this fall/winter. Unless a pile of cash shows up and I can get this lq4 together and dropped in. Pretty sure I'm gonna need sub frame connectors......lol

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Author Topic: welding on a used fuel tank..... (Read 14005 times)