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  #1  
Old 12-02-2018, 10:16 PM
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cleaning up rust in petrol tank

Hi all, so I have a 80L tank now from a 280E (78) to put into my 300D but, it has a little rust in it. How did you guys clean this?

and what sizes are the hoses under the fuel tank?

I was thinking:

Vinegar
Toilet cleaner

I have a few pictures of the inside of the tank.





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  #2  
Old 12-02-2018, 11:11 PM
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Is taking it to a radiator shop an option in your area to get it professionally cleaned?

If the rust is scaly, I've heard of putting a small amount of sharp/pointed gravel in tanks and moving/shaking the tank around alot (sounds tiring). Only do this if it would be easy to get the gravel completely removed.

Vinegar? EvapoRust? Pressure wash? Definitely worth a try.

Good luck!!!
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  #3  
Old 12-03-2018, 12:07 AM
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The local radiator shop overcharges that's the reason I ask for a DIY. It has been filled with a gallon of Vinegar now will agitate around once a while.
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  #4  
Old 12-03-2018, 12:19 AM
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The tank has ''six sides'' will let the vinegar sit one side a day. I just have the vinegar just an hour in and its getting rust loose:



Another question is could I blow in hot air with a heatgun to make the process quicker?

Its a dry tank with no fuel in it.

Last edited by jsp300D; 12-03-2018 at 03:03 AM.
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  #5  
Old 12-03-2018, 01:57 AM
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POR15 make a tank sealer and cleaner kit in one - I've never used it before though so I can't really recommend.
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1992 W201 190E 1.8 171,000 km - Daily driver
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1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
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Don't leave that there - I'll take it to bits!
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  #6  
Old 12-07-2018, 03:38 PM
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If there is a urethane lining kit out there may be your best bet. I was wondering if it was just dried out gas residue. I cannot really see the tank to tell. I might depending flush the vinegar out and try some laquer thinner. If it really changes color it is not rust. Laquer thinner has no effect on rust.
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  #7  
Old 12-09-2018, 11:04 PM
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This tank had sit like 10 years with 1/8 fuel. Rust has been formed. Almost rust loosened now.
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  #8  
Old 12-11-2018, 06:16 PM
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It probably isn't rust, it is likely varnish from old fuel.

Try denatured alcohol / lacquer thinner.
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  #9  
Old 12-12-2018, 08:57 PM
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Its rust though.
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  #10  
Old 12-12-2018, 09:53 PM
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rust

Oxalic acid, water, log chain
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  #11  
Old 12-17-2018, 04:42 AM
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Been two weeks now. One side is 90% clean. Going to do the other sides.

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  #12  
Old 12-17-2018, 06:02 AM
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If you scrape the sides I bet you get to find fresh rust.

You are better off using Evaporust or Rustyco if you can afford it - seriously expensive stuff however.

In the Land Rover world they rave on about electrolysis as a rust removing process - I've not tried it myself yet...
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #13  
Old 12-17-2018, 09:33 AM
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Quote:
Originally Posted by Stretch View Post
In the Land Rover world they rave on about electrolysis as a rust removing process - I've not tried it myself yet...

A lot of the old tractor guys do this, it works. However, the parts need to be baked to drive out hydrogen otherwise you get embrittlement.
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  #14  
Old 12-17-2018, 10:52 AM
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Quote:
Originally Posted by 97 SL320 View Post
A lot of the old tractor guys do this, it works. However, the parts need to be baked to drive out hydrogen otherwise you get embrittlement.
I wasn't aware of that.


The Land Rover lot (so to speak) don't mention baking at gas mark 4 afterwards - and don't seem to mention cracking...


...probably because cracking Birmabright is considered to be normal on a Land Rover so why would they worry about the steel too (!)...



...I wonder how many of them consider this at all. I'm guessing not many - if any. From now on I shall forewarn.
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #15  
Old 12-18-2018, 04:16 AM
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Quote:
Originally Posted by Stretch View Post
If you scrape the sides I bet you get to find fresh rust.

You are better off using Evaporust or Rustyco if you can afford it - seriously expensive stuff however.

In the Land Rover world they rave on about electrolysis as a rust removing process - I've not tried it myself yet...
I can't reach the inside of the tank so I have to wait so I can flush it out.

Let's wait and see
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