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Old 06-10-2015, 01:30 PM   #1
Rgprestige15
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Cleaning a rusted gas tank

I am trying to get a bike running again that sat for years. The fuel tank was rusted pretty bad, so I decided to try a series of vinegar soaks before buying a new tank. I am only about 30 bucks into this and I need some advice before I spend more money in effort to clean and seal this tank. I can easily pick up a used tank for less than 200 bucks on ebay, so I am trying to weigh my options. I soaked it for 2 weeks or so and the result were impressive, though not perfect.


Looking into the filler hole, I thought WOW this worked great!
IMG 2204 zpseaqzhke7

Then I looked into the fuel pump hole and noted there is still a good amount of rust:
IMG 2205 zps8tvlveov

At this point I am unsure how to proceed.

Is there a shop I can take it to and have them deal with it to get it fully cleaned and re-sealed (I'd prefer this option)?

Should I try a stronger chemical and attempt to re-seal myself (growing very tired of this)?

Or should I just save my sweat and just opt for an ebay tank?
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Old 06-10-2015, 01:51 PM   #2
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do a search. There are lots of threads on this subject
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Old 06-10-2015, 01:56 PM   #3
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I used this product twice with good results.
http://www.ebay.com/itm/Kreem-Kit-Me...-/281549700333.
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Old 06-10-2015, 05:22 PM   #4
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This stuff works well. I think you can get it at AutoZone.

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Old 06-10-2015, 07:32 PM   #5
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Caswell epoxy.
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Old 06-10-2015, 08:04 PM   #6
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Quote:
Originally Posted by Stevieboy View Post
Caswell epoxy.
This.

Caswell epoxy coating is the real solution here, definitely go check it out.
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Old 06-10-2015, 08:23 PM   #7
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That's not alot of rust. I used evaporust on an sv650 tank, the chased with wd40 to prevent flashing and then did my best to keep full after that, no sealing.
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Old 06-10-2015, 08:36 PM   #8
Rgprestige15
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Thanks guys. I'll check into some of these products. It looked terrible prior to the vinegar treatment.
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Old 06-10-2015, 11:21 PM   #9
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I've done a couple of tanks using muriatic acid. 1. You have to completely seal the tank. 2. Put nuts or screws inside to use as scrubbers. 3.Stay up wind of the tank, do not breath fumes and use a fan if needed. 4. leave the acid in for not more then five minutes 5. Roll tank around all directions and or shake to clean tank. 6.Drain and rinse with water and use baking soda as neutralizer. 7. Drain again and rinse very well and keep the tank wet. 8. Buy a gallon of wd40 and after the final draining of the water from the tank pour some wd40 in and rinse with that about three times.

If you decide you want to seal it, then you have to use a solvent or degreaser to rinse the wd40 out. But when dry the tank it might flash rust.
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Old 06-10-2015, 11:28 PM   #10
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Muriatic acid can be found in the garden center at Home Depot or Lowes. They have to keep it outside.

Also, you can try diluting first if you want to be less agressive at first to get the desired results.

The tanks I did looked much worse the yours

Last edited by Tiller; 06-10-2015 at 11:32 PM.
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Old 06-12-2015, 07:26 AM   #11
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Quote:
Originally Posted by Tiller View Post
I've done a couple of tanks using muriatic acid. 1. You have to completely seal the tank. 2. Put nuts or screws inside to use as scrubbers. 3.Stay up wind of the tank, do not breath fumes and use a fan if needed. 4. leave the acid in for not more then five minutes 5. Roll tank around all directions and or shake to clean tank. 6.Drain and rinse with water and use baking soda as neutralizer. 7. Drain again and rinse very well and keep the tank wet. 8. Buy a gallon of wd40 and after the final draining of the water from the tank pour some wd40 in and rinse with that about three times.

If you decide you want to seal it, then you have to use a solvent or degreaser to rinse the wd40 out. But when dry the tank it might flash rust.
I've done this whole thing before, also. I do recommend getting the rust out as much as possible like Tiller is saying. I used a bag of shotgun shot (BBs) to knock the rust down inside and then did the acid and such. I don't think it'll ever get PERFECTLY clean inside like you'd want (to keep particles and out of your engine), so you'll probably end up doing the Caswell coat anyway.
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Old 06-25-2015, 11:31 AM   #12
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Metal rescue bro. I literally just did this project a couple days ago. Bought a 05 gsxr that sat for about 3 years fuel pump was nasty. Tank was worse go to home Depot and buy a product called metal rescue. After 6 hours of soaking. I poured out and stuck a vacuum hose down in my tank to get what was left.my fuel pump comes in the mail today so first start up tonight actually. If your local I can help.Click image for larger version

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Old 06-26-2015, 02:37 AM   #13
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Quote:
Originally Posted by Rgprestige15 View Post
Thanks guys. I'll check into some of these products. It looked terrible prior to the vinegar treatment.
I have 5 gallons of rust eater sitting around if interested Click image for larger version

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