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MG TD TF 1500 - Gas tank liner

I did not hold the gas pump nozzle deep enough into the tank while filling the other day. As a result I filled the tank to within 3/4" of the filler cap.
I believe some of the fuel got behind the lining in the area of the filler cap. I can see the lining hanging down in that area. As the gas level receded I was able to push the lining back in place with my finger. Obviously this does not hold and eventually it sags again.
I am open to any and all suggestions that do not require removing and re-lining the tank. The lining throughout the tank seems substantial and I have had no other problems with it.

With the gas level very low in the tank would it be possible to apply adhesive between the appropriate services and attached the lining around the filler cap neck?
TIA,
Mort
M Resnicoff

Mort. TD does not have a liner. Did you post this on the wrong forum?
Bruce Cunha

If you're talking about the products that are designed to seal the inner surface of the tank Mort such as 'Gold Standard Tank Sealer' & the like, then you've got me worried. I haven't been able to bring myself to apply this product for ages now, mainly because of horror stories that I've seen & heard about failures with the application. The tank is still sitting on my snooker table where it's been for at least five years. Every week or so I upend the tin so it will still be usable if ever I decide to bite the bullet. I'm thinking now I'll not use it unless I absolutely have to. I'll be watching this thread develop with a keen interest. Cheers
Peter TD 5801
P Hehir

I think that re-attaching that hanging down liner to the tank will be very difficult. It sounds like either it was not a very good product or there was an issue with the metal surface it was attached to. I suppose it might be possible to remove a small piece and see if you can find something to adhere to it (like some more tank lining material). But you would need to clean the neck of the tank thoroughly to give it a chance. I suspect that a better solution might be some means of physically holding the lining in place by, for example, swageing a metal ring into the tank neck. Probably only a temporary fix though to get you through a season.
I used POR-15 tank lining myself and so far, so good. During winter I drain down the tank completely and put the fuel in a steel jerry can to preserve it. I feel happier knowing there is a lining in the tank to prevent any corrosion, especially with modern fuel containing alcohol.
Dave H
Dave Hill

Just a wee warning about tank liners/sealant. Mask any threads VERY well and preferably have a threading tap to hand before you seal. I plugged the outlet hole in the tank of my M Type MG with a scrap bolt and had to use heat to unscrew it. The slosh sealant is a better thread sealant than Locktite.

Jan T
J Targosz

Bruce,
I am on the correct forum. Apparently a PO had this tank lined and I do not have any identification of the material used.

M Resnicoff

IMHO, you will eventually need to pull the tank and have it all cleaned out and removed. As normal driving would slosh gas all over the tank I don't see how filling up all the way would make any difference. If pieces start breaking off it could clog the outlet strainer mesh. Obviously be careful even while looking into the tank due to fire hazard. Maybe use some plastic tongs or tools to fish around in the tank to avoid sparks. At least it wasn't the liner that dissolves in ethanol and deposits on the fuel pump valves, floats, intake valve stems, etc. George
George Butz

George do you know the name of the brand that fails & dissolves in ethanol? Cheers
Peter TD 5801
P Hehir

Mort, the tank will have to come off and be professionally cleaned. I do not believe it had to do with over filling as fuel will slosh much higher than the 3/4" from the top. It is just the nature of many tank liners that they cannot stand up to the fuels available today. I think it is just coincidence that you noticed the dropping lining material now.

Good news...it is not your fault..bad news... you are still responsible for the fix.


Regards, Tom
tm peterson

Ok, now I understand. Thought this might be for a new TF.

The compound I used back in 1975 is still intact as I observed when I put a flex camera into the tank.

I think what you were told is correct. Probably no way to reseal the material.
Bruce Cunha

Old stuff used in the 70s/80s, no clue what brand. It was a big problem when ethanol laced fuel was mandated here years ago. George
George Butz

The POR-15 people recommend POR Strip for removing old faulty liner from a tank. No idea how well it works as I have never used it, but it could be handy.
Dave H
Dave Hill

This thread was discussed between 09/05/2017 and 10/05/2017

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