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Username Post: rusty gas tank        (Topic#347445)
66 Blu panel 
Posts: 831
66 Blu panel
Loc: B.C. Canada
Reg: 10-19-03
10-01-17 02:31 PM - Post#2709392    

I put a gas tank from a G10 van into my 66 Step side long box and the gas cap didn't get put on before I put it outside. Now I have a little gas and water in the tank. It's a lovely rust brown inside. Is it more cost effective to replace the tank or clean it?

How would I clean it?


Bel Air kiwi 
"3rd Year" Silver Supporting Member
Posts: 4332
Bel Air kiwi
Loc: New Zealand
Reg: 04-24-14
10-01-17 10:24 PM - Post#2709451    
    In response to 66 Blu panel

Hi 66Blu, probably cheaper to put a new one in in the long run. Once you start the rust issue its nearly as expensive to rid the system than replace the tank, given how common they are in the aftermarket.
If you local fuel is alcohol boosted or the car sits for extended periods then a plastic tank may be the answer.

Cheers kiwi

48 3100 RHD, 51 Deluxe 4DR RHD, 51 Bel Air parts car, 52 Bel Air P-Glide LHD. Others 23T, 32 Tudor, 58 Edsel pacer 4DR HDT, 79 F250 351C RHD. 69,70,82 Capri. No mobile, no TV, and no Jap cars.

"They made a desert and called it peace." Tacitus

Valued Contributor
Posts: 3837
Loc: Houston, Texas
Reg: 01-02-02
10-05-17 01:21 PM - Post#2709849    
    In response to 66 Blu panel

POR-15 has a pretty good product. I'm using this for my 2 original saddle tanks. It's a whole lot cheaper than a new tank or fuel cell.

POR-15 Tank Sealer

-The Hilander.
Silver 2017 Silverado 1500 double cab 2WD 5.3L,
1966 C20 Custom Camper "Rattle can primer red" 5.7L, 700 R4 trans 410 diff. front disc, p/s
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66 Blu panel 
Posts: 831
66 Blu panel
Loc: B.C. Canada
Reg: 10-19-03
10-20-17 08:29 PM - Post#2711547    
    In response to hilandr451

I went to my local parts supplier and asked them what have you got in terms of cleaner sealer and got the POR 15 Fuel Tank Cleaner/Sealer. I took pictures of the inside of the tank through the hole for the gas pickup after and its a nice lovely epoxy gray. My cost was about $100 and a few days work.

Posts: 279

Loc: northern California
Reg: 01-27-17
12-15-17 11:16 PM - Post#2718101    
    In response to 66 Blu panel

The title sounds like an R rated film

Just clean up the rust with a nice old piece of sandpaper.

If that doesn't work, tell the gas tank to stick it in its ear like i told my transmission and linkage and then get a new one.

Or instead of buying a new one have a welder build one from scratch

Edited by Eric_Gary132 on 12-16-17 08:17 AM. Reason for edit: No reason given.

Keith Seymore 
Posts: 679
Keith Seymore
Loc: Southeast Michigan
Reg: 09-17-08
12-17-17 06:00 PM - Post#2718300    
    In response to 66 Blu panel

We've cleaned gas tanks before by filling them with soapy water and letting them ride along with us during our commute for a few days.

I used the Bill Hirsch gas tank sealer on the fuel tank of my GTO and it did a fine job. It was important for me to preserve the original tank because the rest of the car is original and unrestored.


Chevelle Intro:
My Pontiacs:

Edited by Keith Seymore on 12-17-17 06:00 PM. Reason for edit: No reason given.


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