Gas tank repair

Rex Kapriellian

Rex Kapriellian

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My gas tank is in great shape, except I can see a haze of surface rust on the inside. A Local shop will acid wash the inside Of the tank, Followed by a cold sealer or a baked on sealer, looking for advice before I send it out or maybe a different method.
 
Rex Kapriellian said:
My gas tank is in great shape, except I can see a haze of surface rust on the inside. A Local shop will acid wash the inside Of the tank, Followed by a cold sealer or a baked on sealer, looking for advice before I send it out or maybe a different method.
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As you describe it, a "haze" is nothing to worry about. I always always avoided using sealers where that was no clear indication of significant corrosion. The way you describe it your tank innards will be fine as is, two precautions for further use a) NEVER use fuel treatments which contain alcohol, alcohol is a water attractant. b) store with a full tank and use a stabilizing product like stabil for the winter. It has just enough lubricant to stop that hazing from growing c) Consider putting fuel filter replacement on a time schedule rather than mileage schedule

"f.w.i.w.....y.m.m.v."
 
Rex Kapriellian said:
How do you stop the rust after you have it removed with evaporust?
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a) NEVER use fuel treatments which contain alcohol, alcohol is a water attractant. b) store with a full tank and use a stabilizing product like stabil for the winter. It has just enough lubricant to stop prevent oxidation like the hazing you are now seeing c) best strategy for protecting your car from the effects of storage is to DRIVE IT!! I am getting ready to put 2270011 back on the road after a LONG period of storage, believe me, not pretty....
517a49752a44a3ad8326e2939c55264a.jpg
 
The POR-15 converts the metal like Evaporust but then includes a sealer that will prevent it ever rusting again. I am going on 7+ years on mine and the inside of the tank is still pristine.

Rex Kapriellian said:
How do you stop the rust after you have it removed with evaporust?
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Stevehose said:
The POR-15 converts the metal like Evaporust but then includes a sealer that will prevent it ever rusting again. I am going on 7+ years on mine and the inside of the tank is still pristine.
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Now, I should also mention, they’re a couple of spots of rust built up(6 inch diameter and I would guess 16th of an inch). Is POR 15 strong enough to remove the deposits?
 
If it were me I would make up a sanding pad attached to a rod and sand it flat. Then treat.
 
I used evaporust and it works well but found that after you wash it out, a slight haze of rust forms so I now use it, wash it and then immediately hit it with a heat gun to dry it.
 
I had a repair done on mine, then following advice, I filled it with vinegar and left it a week. Threw a load of nuts into it and shook it up vigorously ever day to agitate loose surface rust. I didn’t fancy using any coating, as if it goes wrong and starts peeling off some time it would be a problem. The trick I believe is to keep plenty of fuel in the tank and it shouldn’t rust. I also gave the outside of the tank a paint with POR15, mine had rusted in the seam from the outside, from water sitting in the trunk/boot floor.


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damienh said:
I had a repair done on mine, then following advice, I filled it with vinegar and left it a week. Threw a load of nuts into it and shook it up vigorously ever day to agitate loose surface rust. I didn’t fancy using any coating, as if it goes wrong and starts peeling off some time it would be a problem. The trick I believe is to keep plenty of fuel in the tank and it shouldn’t rust. I also gave the outside of the tank a paint with POR15, mine had rusted in the seam from the outside, from water sitting in the trunk/boot floor.


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I have seen videos of using vinegar to remove the rust. My concern is what follows to prevent the rust to build back up again.

I’m a little hesitant with coating the inside as it may peel. But left untreated the rust is inevitable.

I bet if you read the ingredient in evaporust, it would be vineager.

Thanks for sharing.
 
Rex Kapriellian said:
I have seen videos of using vinegar to remove the rust. My concern is what follows to prevent the rust to build back up again.

I’m a little hesitant with coating the inside as it may peel. But left untreated the rust is inevitable.

I bet if you read the ingredient in evaporust, it would be vineager.

Thanks for sharing.
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I did agonise over this one before deciding what to do, but I was advised by the guy who repaired the tank (this is obviously a specialist job, so I did trust his opinion, that it wouldn’t rust if it had fuel in it. My tank was spotless inside, and given its age of 45 years, I decided that it was unlikely to deteriorate significantly in my lifetime. The only way it could potentially rust is from evaporation forming on the roof of the tank. As my tank had only rusted from the outside, which took me a while to realise, I’m happy with what I did. It’s worth mentioning the vinegar needs to be flushed out properly and the tank cleaned with detergent (I think), and rinsed with water, then, as soon as it is dry, you need to put some fuel in and swish it all around to coat the entire interior to prevent surface rust getting a chance to appear, if it will be a while before it’s back in the car.


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There is a new family of rust eaters that aren't acidic or alkaline but are targeted to iron oxide. I've posted a photo of a crusty carb after soaking in the stuff sent by the guy who recommended it to me. The stuff does not harm sound paint or plating. Nontoxic although I wouldn’t drink it.
Here's an ebay auction for some that I've bought, but haven't used yet. It's a concentrate that must be diluted. It can be reused many times although the effectiveness will decline over time. The price is right too.

Ian

Picture of crusty carb after soaking.jpeg
 
I used Evaporust to clean the inside of my trunk, and then used the POR kit. Worked great.
 
mulberryworks said:
There is a new family of rust eaters that aren't acidic or alkaline but are targeted to iron oxide. I've posted a photo of a crusty carb after soaking in the stuff sent by the guy who recommended it to me. The stuff does not harm sound paint or plating. Nontoxic although I wouldn’t drink it.
Here's an ebay auction for some that I've bought, but haven't used yet. It's a concentrate that must be diluted. It can be reused many times although the effectiveness will decline over time. The price is right too.

Ian
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Aren't those carb bodies made of pot metal/aluminum? Is the product a general cleaner? Why did it clean the aluminum?
 
I can't speak to the material content of those vintage motorcycle carbs. The image was provided by my acquaintance to support the claim that the product eliminated rust. So I believe that these are iron body carbs. My acquaintance reported that in his experience the product works well.
Here is a similar product, Evapo-Rust. I believe it has a higher price than the eBay product I linked to.

Ian
 
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