How to remove rust from a gas tank?

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How to remove rust from a gas tank?

Post  747JetMech on October 16th 2013, 3:30 pm

I have a early Maverick and I want to clean out the rust inside the tank. I have tried the muriatic acid method but didn't like the results...
Anyone try this method? http://www.jalopyjournal.com/forum/showthread.php?t=717730
The tank has a vent on top. My vent is not drilled, plugged. Some are open.. I know this was changed at some time. Which one should I use?

Thanks
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Re: How to remove rust from a gas tank?

Post  cool40 on October 16th 2013, 7:01 pm

Can you buy a new tank?
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They do not produce a early maverick tank

Post  747JetMech on October 16th 2013, 7:49 pm

There are a few articles where people installed a 1976 tank in a early 71, 72, 73.. I guess if there is no easy way to clean the crude out of this one, then that's the way I should go. Any thoughts on the vent on top of the tank? Should I install the plugged one or the open one? I guess it depends of the gas cap is vented?

Thx
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Re: How to remove rust from a gas tank?

Post  cool40 on October 16th 2013, 8:11 pm

i'd use the vent.it wont hurt anything to have it and may help when filling the tank.have you checked the price for a new tank? i got one for my 80 bronco for less $$ than the used one. Idea 
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Re: How to remove rust from a gas tank?

Post  maverick on October 16th 2013, 8:19 pm

I replaced an Econoline tank earlier this year...rusty mess inside. When I added up the cost of the cleaning stuff, the effort, the aggravation and the MARGINAL RESULTS...I bought a new one.Rolling Eyes 
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Re: How to remove rust from a gas tank?

Post  61coon on October 16th 2013, 8:22 pm

I agree with Lee. I don't think are too terribly high. 130-160 dollar range I believe.
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Re: How to remove rust from a gas tank?

Post  69F100 on October 16th 2013, 8:23 pm

I have used gravel but wash it good to get all the dirt off it then put it in the tank with dish soap.and hot water and shuck the grap out of it to knock the rust loose. It might take a few times to get all the rust off then put a hose in it and let run for about a hour dump it and blow it out with a air hose. Just a trick I learned back along time ago.
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Re: How to remove rust from a gas tank?

Post  bigblok2000ranger on October 16th 2013, 9:09 pm

Four bottles of The Works toilet bowl cleaner and a bag of marbles. Rinse thoroughly (about 4-5 times) then coat with WD-40.
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Re: How to remove rust from a gas tank?

Post  res0rli9 on October 16th 2013, 11:55 pm

I use to take mine to the rad. shop and have them dip it, and then put a sealer from eastwood, eastwood also has the cleaner, its a kit.

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Re: How to remove rust from a gas tank?

Post  dfree383 on October 17th 2013, 12:26 am

Probably better to just replace it, most of the time if they are that rusty they are going to break thru if it hasn't already.
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Re: How to remove rust from a gas tank?

Post  DILLIGASDAVE on October 17th 2013, 3:19 am

A new/good used factory tank is really about the only way to go IMO (or a fuel cell).

Once the galvanized coating inside a steel gas tank is compromised and rust starts to form you really can't ever stop it 100% from forming again. You can remove the rust with any number of various acids, or abrasive methods, but without the galvanized coating on the steel surface the rust will return. And spraying a "rust protectant" inside the tank like WD40 or PB blaster is useless once it's washed away when gas is put back in the tank.

The plastic/epoxy coating deals like from Eastwood can fail too because the inside of the tank has to be absolutely 100% rust free, (every seam, every corner, everything) and coat/attach to every nook 'n cranny inside the tank. If not the rust will return, and as the rust grows the coating will eventually turn loose from the inside of the tank.
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Yup

Post  747JetMech on October 17th 2013, 11:23 am

That's what happened with the Muriatic acid I used in the last one. Came out spotless but rusted later on around filler area... I have a old Harley Lowrider that I did not want to repaint. So I used the acid and coated with POR.. Did not turn out as well as I expected..

I will just bite the bullet and order up all new parts and make them work. Tired of screwing with it.. As far as the vent on top of the tank, where do you guys route that to? Does it need a check valve?

Thx
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Re: How to remove rust from a gas tank?

Post  Darrin Gorham on October 18th 2013, 4:38 pm

call a galvanizing shop, They have tanks of acid for this and regalvanize it.

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how about a magnet.

Post  Bigmat on January 22nd 2014, 3:53 am

How about just putting a magnet in the tank. If it is metallic it will stick to the magnet. Drive around a bumpy windy road.remove magnet with crud attached ? Just a thought as that way not much should end up in the pickup tubes.

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Re: How to remove rust from a gas tank?

Post  richter69 on January 22nd 2014, 9:10 am

new tank ftw......
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