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MG TD TF 1500 - Leaking fuel tank cap

Fuel sloshes out of fuel tank when driving after fill up. Yes, I know I could put less fuel in at fill up but that is not a fix. I purchased a new cork gasket that goes on the cap. The gasket that goes on the tank is the problem but cannot find a source for them. Does anybody know a source? It is 1 3/4 OD and 1/14 ID. I could make one but thought I would try this first. Thanks
Gary Fisher

From the Frame UP

GA236 Fuel cap cork washer 49 TC, steel filler neck and later T-Series

Moss Number 293-600

https://mossmotors.com/catalogsearch/result/?cat=&q=293-600+gasket

Says it's in stock.
Christopher Couper

They all leak if you fill the tank. Always have, always will. Archives are a good thing. Search there. Some have used a piece of a chrome/brass sink drain fitting to make a sort of baffle with some success. Been driving my TD since the 70s and just don’t fill it up. George
George Butz III

I got mine from NTG in the UK, but I had a number of other parts to get also. FTFU is probably a good resource.

Make sure you seat the gasket in.

Also, check the pin (Screw) that holds the cap on the tank. These can get worn, as can the holes on the cap and tank.
Bruce Cunha

Even if it is sealed tight, it is vented and will still slosh some out.

I've stufffed an O-ring into the tank filler. They'll last a few years and need replacing eventually.
JIM N

Easy fix. 1 1/2 " chrome tail piece found at any hardware store. I cut mine about 2 1/2 inches long and then cross drilled a 1/4 inch air hole about 1/2 way up the length. Insert it into the filler hole and the problem goes away.

Interesting side note; this tailpiece is not available in the U.K. as their plumbing is a different standard. After I posted this fix, years ago, I was asked to send some tailpieces to folks in the U.K. I did that and was rewarded with tele-tubby cookies for my grandkids. They were not available in the U.S.A.

Tom
Thomas McNamara

Thanks everyone. Going to give the tail piece a try plus the gasket from Moss. I missed it when searching.
Gary Fisher

The aluminum dipstick serves a similar function and also measures the quantity. I am not sure who is selling them now.

As mentioned above, the cap is vented so the tank won’t airlock. You cannot make the the cap fluid tight. The best you can do is reduce the slosh..which not “topping off” does..and it costs nothing and has a negligible effect on range.

I have a lot of respect for the 50 year owner experience George brings to the forum.

Regards, Tom
tm peterson

In addition to the baffle, I use a tissue wrapped around the filler neck and fixed with a rubber band or large o ring. Does not look nice, but prevents fuel running down the outside of the tank which looks even worse.

Rgds Mike
Mike Fritsch

This thread was discussed between 19/02/2022 and 27/02/2022

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