Think I'd move my truck out of the way before sticking a flame in the tank..!🤣

I always learn something by coming here. That was a great repair and i loved the air across the hose to draw out the water tip.

Excellent repair work man I was always afraid of the repairs of gas tanks for obvious reasons but you showed it could be done safely. I also love the tip on syphoning on the hose.

very informative, I really like the focus on being safe

Great video. Lot's of good safety information. First video with great tips and info I've seen on welding on a gas tank. I'm saving this one, thumbs up!

Using the exhaust to prevent a flame was really smart. I never would've thought of something like that.

Nice video, I actually didn't really think of bronzing it, which is a great idea, I have to pull the fuel tank off my tuscon, and this video seems to be a real help

I watched your tank repair method with interest as I've done a few and added necks and outlets to different spots. People need to be able to do repairs that would otherwise put their vehicle out of commission. I would guess one person in a hundred would even attempt this job; so good for you. I always soldered mine which isn't as strong but is much easier to do and gives a great seal. Your exhaust method works, and I've used it, but is suspect because modern cars inject enough air into the exhaust to burn the remaining CO and hydrocarbons. My first tanks were flushed with 79 cent cans of R-12, which gives you an idea how long ago that was. Almost any freon will work as long as it's not flammable. They all produce toxic fumes in a flame though so work upwind or hold your breath. As I got older and smarter I got some CO2 tanks, as used in beer tanks, and used them to flush the tank. Two ounces ,by weight, of CO2 will displace about 5 gallons of air. Obviously dry ice will work too. Nitrogen will also work as will Argon/CO2 mix. Surprisingly full tanks are less likely to blow up because they contain less air and the air they do contain is too rich in fuel or over the UEL Upper Explosive Limit. I don't recommend working on full tanks though; as a mistake makes a very bad scenario. Empty tanks are not safe either though. Don't be fooled by a tank can flash more than once as fresh air gets back into the tank and mixes with combustable vapors given off by you heating the metal. The bad news is then you might have molten metal present and you get it in the face. When there are pin holes like you have there, I like to tin the area around them and put a short sheet metal screw in the hole and then solder the screw head to the tank. Often people overlook the old fashioned heavy copper soldering irons which work extremely well on gas tanks and don't overheat the thin metal as a torch might. If you overheat the metal when soldering it gets a layer of oxide and won't tin. Thanks for the video.

Excellent video. I've learned about this but never seen it done. Engineering courses did not stress ventilation, but adding water was a MUST. Flammability triangle is Oxygen, Fuel, and Ignition source, so filling it up with water removes Oxygen from the picture. So hot fuel (if trapped), cannot combust. Thanks again for the video!

Sweet, this is exactly what i needed to see thank you!

I’m surprised you did the flame check next to your vehicle. Nice job as always. Your my go to guy for common sense repairs.

Big thumbs up for showing me that trick using the hoses venturi effect with the air compressor to start liquid flowing.

That's a great tip on running the exhaust through the tank. I remember trying to repair a couple of 5 gal tanks for the boat 50 years ago. Rinsed the tank 3 times and filled it with water, turned it upside down with the lid on it. Hit it with the torch and it jumped about 2 feet into the air. I went and got some JBweld to finish the tanks with. LOL Also loved the venturi syphoning trick.

I've welded few gas tanks quite similarly. What I do is that I put biggest hole up, fill tank absolutely full with water (no air space allowed). When I get tank really full that it's close as possible to overfill I take propane torch and ignite gas that's risen on top and let it burn out. Then I begin pour out water and keep flame _all the time_ right at the edge of the hole. It's common to get some "puffs" occasionally, but that's the point. To ignite possible gasses before they mix out with air for ratio and amount that's really explosive. Then when emptying and still holding that naked flame all the time I begin to heat tank from the outside to get those trapped vapors out of pores. If the naked flame gets out of the hole or extinguishes even for second I restart the process. Fill the tank again with water and basically restart everything. Doing this with care results in tank you can't smell gas at all and is perfectly safe to weld. Welding tanks isn't too bad of an process. You just need to focus on job and safety. Very good rule is that if something feels somewhat fishy or bad when going into it, one should rethink the hole process again. Also with gas tanks is good to have that mentality that if you smell fuel, you're likely doing something wrong and definitely need to be careful and think again what one is going to do next.

Dude, thanks. I was wondering how to purge the old flammable gas out until you showed how you did it with exhaust gas. Very helpful video in general.

This is a fantastic video!!! Great information and nicely put together. Thank you so much for this!

Nice fix! I really liked that siphoning trick.

Great fix and I like how safe you were about everything.

Good video. To the pointbgood knowledge on subject. Clear filming snd sound. Thumbs up

Nice repair Moe, Thanks for sharing!

thats a really nice truck, reminds me of our 1985 Dodge Ram we had for a long time.

Isn't that the slickest siphoning trick ever???? lol...Thanks for the shout out my Friend! Excellent repair job...good for the Grandkids now! You are more than welcome to link the quick tip video if you wish. Cheers!! Zip~

Thanks very much for your expertise I appreciate listening to you and watching you

Soldering with a soldering copper is much better and safer then brazing with an open flame, a process I learned decades ago the hard way! I love your confidence with a pole and the propane torch but the $30,000 truck is parked next to the tank!

I love the idea hooking the tank up to the car exhaust, Heck yea that will work! I could of fixed up my 1956 Olds gas tank like that but I was young and dumb back then

As always great Workmanship!! :)

Nice fix man that old ford looks good for her year to

great video. Really like that air gun/ siphoning tip

Great fix and great looking truck!

Wow. You're a champion. I weld *new* tanks. Never had the male reproductive oval organs to weld on a used gas tank.

More good tips and tricks. Thanks Moe!

Another big money saving tip! I liked the siphon idea

There is a bunch of good tips in this video. Thanks.

Excellent work!

another good one Moe, I want to come back in 30 years to see if you were right.

Actually it is the FUMES that burn. Look up running vehicles/engines of fumes here on KZfaq. Pretty cool stuff. I have tried it on a small scale in my mower. It does work as long as you can make the fuel warm to help turn to vapor.

rock climbing vid at end is awesome and inspiring, thanx for that!

Very cool and makes sense. Trying to learn about cars.

Great video!! Por-15 also has a decent product that I discovered for restoring fuel tanks and dealing with internal rust. It's lasted me 20+ years on the OEM 1986 tank of my Suburban 2500. Not a spec of rust in the fuel filter since I used the product all those years ago too. Pricey however.

Good repair. I believe there is a liquid that you can put in the tank and slosh / rotate it around to seal the tank. Good videos.

Great video again and very informative, keep um coming mate 👍

4:57 - "It goes HOOWOOSH" lol! Made my day!

Thank you for taking the time to explain.

Great job. That the answer Im looking for.

Thanks for the video!

awesome the way you drain the water. thank you. joined

I love that truck! I tried to buy one just like it when I was a teenager but the guy wanted too much for it for the condition it was in. couldn't stop laughing seeing you with that long pole and helmet. guess you wanted to keep all the extremities lol

very good fix moe , Thumbs up !

MAP works with the correct torch, I've done it many times

Excellent job, is it still good. I did mine with silver solder and that worked fine as well.. Watch all your vids....great channel..take care. Happy New Year!

Good video. I've had JB weld fail before, and it seemed to be related to ethanol in the gasoline.JB was holding fine, and the first gas with ethanol, it started leaking. And this happened on two different machines---each with the first use of ethanol.

Two tanks? What sorcery is this. That's... awesome

Safty first lol. I like the torch on the end of the stick. I haven't seen anyone weld a gas tank in years. Now we just replace and don't rebuild anything.

Very informative, and makes sense. Thanks very much

Nice repair man

very useful knowledge, excellent video.

great fix

i need bigger oxyacetylene tanks. i use it for lots of things but I've never tried brazing. man that was a step hill. as always great vid

Wicked nice tip. Thanks for sharing...

Yeah, empty gas tanks, that still have a little bit of fumes inside, are more dangerous, than granade. People lost their heads, trying to weld that. You could also fill it with water, but that would present a problem for welding and other non-flammable gasses can be expensive.

The strap on my '96 F150 collected moisture & caused my tank to rust, too.

I like the fumes to dry out the tank and That climb looked like straight up, I'm not sure about doing that. LOL

nice video i learned a few new tricks from u. tnx

Nice job, one thing I might add: wear some glasses when you are under the truck and you'll have less of a chance of getting crud in your eyes. I wish we lived near each other, we could really get in some trouble! Keep up the good work!

Good job brother. God bless you

Hawaii? I like the siphon trick. A good tank sealer is Red Kote, I use it for Motorcycle tanks.

That hill looked like it was vertical. That is some truck you have there.

good job- thanks for sharing

Good tips, as usual, thanks

You're the man Moe

I found I have to start a big circle and work my way to the hole.Hard to get to stop leaking

I solder up gas tanks . I normally take the air compressor blow gun and tape it down and tape it to the fuel filler pipe. Then I solder it. That keeps air blowing threw it so it doesn't build up any fumes. I've even done it with a vacuum cleaner before.

Good video! shared with my car group! :)

Nice repair, super siphoning trick. That JB Weld did a good job though for all those years. Cheers Martin

Thanks for sharing...

You can also run exhaust from a running vehicle in the tank while you weld. Carbon monoxide will not burn.

HOoly shit , that was a steep incline !! nicely executed !!!! to your vid i might ad ,normal soder with the right flux and only electric soder iron , i made a alost half full gas tank on the car with lifted tail end to fit under , worked a treat ,but it have to be a big ass sodering iron tho ,this was a boat sodering iron a inch thick and took half hour to warm up but it worked ! some zinn 1 flux is gret for the job as flux!

I think he should have run the exhaust pipe fumes through the tank about 3 days and filled the tank with water about 15 times, then filled the tank with sand and had a fire truck nearby just in case there was a flame 🔥 present, just as a quadruple or quintuple precaution.

Cool thank you for sharing

Nice video. My mechanic showed me this morning that my little commuter cars gas tank showed some residue of gas and suggested it may be seeping because my car does have rust throughout. He suggested I leave it alone and drive it because the bolts holding it may be seized and will cause more issues for me and the car. He knows the car is sentimental to me being it’s my first car but suggested I look into another commuter. I don’t have these tools or know how you show but is there another suggestion in my case where I can coat the whole gas tank to preserve its life something like a a big tube of jb weld

Nice! Curious, when you were letting exhaust fumes in to help dry it out, what if it was running rich and some unburnt fuel went into the tank?

That near vertical rock climb was way sketchier to me than the tank repair. Great how-to on gas tank safety for hot process repair too!

Back in the day we used to solder the tanks using a soldering iron, not the electric guns, but the large ended, old time iron that we would heat up with the torches. I did set the car wash floor on fire at our body shop once...but that is another story...

cool...awesome fix

I would have hit that area after a good clean up with two layers of epoxy primer followed by two layers of good paint and then undercoating, especially where those straps run to hold up the tank.

Hey man, great video. How long did you wait after you drained the water? The place I took my fuel tank to get welded used water as per your video and I have been draining the water from the tank since but am wondering what can be classified as enough waiting time to assume the inside is dry? Should I also pour some other chemical to absorb the water totally?

Hi, Very nice and great video. I have a gas tank that has been removed from the car for about a year and has been out side with no cap on it. It is completely dry inside and I do not smell any fume. is is safe to sand it with a sander that can generate spark? someone told me something with gas that it will never go away even sitting outside for 10 year

i use to weld tanks best bet to buy new tank if at all possible good video

Gas won't burn as a liquid, it has to to vaporize . As a crash fireman I lit gasoline fires to train with. A hundred gallons at a time. You could actually have hard time lighting it without agitating it to get fumes.

I liked the ending

nice fix

If you are going to take on a gas tank that is the way to approach it. All the caution and warnings are here in the video...

Exhaust pipes have lots of moisture coming out

That's pretty cool and I don't know if you will comment or respond. Here's my question, is buying a new one from let's say eBay or Parts Geek a good idea? Maybe I'm just stupid but I'd think a tank from like the 70s or 80s would be twice as thick. Granted we understand Metal a lot better nowadays.

Do your neighbors give you weird looks at night when they see you with a propane torch duct taped at the end of a 5 foot long pole? Mine don't. The old Ford has a few more gallons to drink now. Nice fix.

I hope you don't take offense to this comment. The siphon technique is know as the Venturi principle, or Venturi effect. It's the basic idea of the carburetor. A plain and simple idea. It is also used in those waterbed pumps, that connect to a sink faucet. Turn on the water at the faucet, and it sucks the water from the bed. They also use those in auto shop vacuum tanks. An air hose is connected to a fitting, turn on the shop air, and it will vacuum out a trans pan, oil pan, or a radiator. The video you did about making your own vacuum pump with an old compressor, you used fitting from an old a/c vacuum device. It was the small red plastic tool, with the shop air line nipple on one end, and the two sized a/c line connector on the other. That device worked the exact same way as the blow nozzle across the end of the siphon hose trick, you demonstrated.

I braze with my oxy propane all the time. Heats up everything I need to. Normally it's on thinner stuff. And the thicker stuff I get with my stick welder

I've got an extra rear tank and straps still in the box in southern Ohio if you happened to need it.

Another way to check if the gas has completely evaporated is to light a match at the opening of the tank. Just kidding of course. Another great video!

very nice