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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #1  
Old 9th August 2022
eddie XLX eddie XLX is offline
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Default NOS oil tank refurbish

Hello everybody,

I bought a new old stock oil tank that should replace the old leaking oil tank. On the inside, there is a little flash rust, which I want to remove with some liquid rust remover. Now I ask myself, if it's necessary to coat the inner surface of the oil tank after removing the rust with some special sealing fluid or not, because the tank is full of engine oil and normally could not rust again. What do you think?

Thanks and greetings from a very hot and dry South West Germany
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Old 9th August 2022
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If you are going to use it right away, a light coat of oil after de-rusting will keep it from flash rusting again.

If you are putting it on a shelf, mix something like Morey's Oil Stabilizer 50/50 with the oil and it will stay put a lot longer.
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Old 9th August 2022
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White vinegar should work too, and is cheap.

John
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Old 9th August 2022
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No need to coat the tank once de-rusted if you put it into service. The engine oil and vapors will prevent rust.
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Old 9th August 2022
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If you coat it, you stand the chance of coating de-laminating and blocking feed port on tank. Most likely when you are not watching it.
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Never saw a lined oil tank, what product can stand it.Rust can be stop by adding oil in the tank.
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Old 10th August 2022
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mr. john makes a solid point, mild acid, reason????
rust converter transforms ferrous oxide to ferrous phosphate which in itself is not bad but there will be residue left behind and this may/may not be bad if is cuts loose, but why take the chance.
now if you want to flush and not convert, then you can use a converter like phosphorus, but you must not leave it till it dries, follow label.
vinegar $ vs converter $$$.
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