Tricks for cleaning old fuel tanks?

[Egon]

That one is a good solution Piloon.:thumbsup:

 

[ultrarunner]

I used a couple of things when I cleaned my old IH 340 utility gas tank years ago - I had the best results from using some Naval Jelly + some good sharp-edged gravel from the driveway and rinsed very well and dried before using a gas tank sealer. This quart of sealer was around $35 but it will do about 3 or 4 automotive sized gas tanks, can't remember the name of it to save my life. You pour some in the tank and of course turn it all around to coat the inside everywhere then pour the remainder back in the can. It forms a tough, very thin membrane and seals any leaks you might have. I did that tank about 13 years ago and the current owner says it's still holding well. I bought the can of sealer at my NAPA dealer back then.

Fuel Tank sloshing compound is something I have used a lot over the years... everything from antique car fuel tanks, motorcycles and power equipment.

I have one that I did in the 80's that is giving me problems... seems California reformulated gas dissolves the compound into a goo... what a mess.

 

[wdchyd]

Some motorcycle shops sell tank repair kits with polyurethane for stopping/ preventing leaks after the tank is cleaned. I second the loose bolts/ nuts and the muratic acid. If you're going to use the acid, you may want to dilute it. remember to add the acid to the water, not water to acid and use in very well ventilated area.:thumbsup:

Jim

x 2......IIRC, the stuff is called "Kreem" and it comes with phosphoric acid, MEK, and the polyurethane coating stuff......

It works real good after the nuts/bolts or rocks, then solvent/ cleaner

 

[AV8R62]

I used white vinagar to remove the rust then rinsed the tank with warm water and baking soda.

 

[pheonixthree]

Just a quick word of caution if you are going to unsolder a gas tank...make sure it has not had gas in it for a long time! Flush it out. Force ventilate with compressed air or CO2.

I use CO2 from my mig welder if there is ANY odor from tank before/during grinding or applying heat. CO2 displaces the air and will not support compustion.