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MG TD TF 1500 - Gas sloshes out of the cap.

If I don't short a fill-up by a couple of gallons, it sloshes out of the cap. I've tried to put a variety of gaskets around the cap, but anything that seals it won't allow it to click closed which pretty much makes things worse.

Has anyone come up with a solution for this?

An anti-slosh cone or baffle placed into the opening below the cap perhaps?

....
MAndrus

I don't mean to sound like a smart ar*e, but don't fill it so high. Since it's a non-sealed system, this is a pretty normal situation when the tank is filled near the top. The tank breathes through the cap.
Steve Simmons


M ---do a search of the Achieves-- There are several comments about using a 1 1/2" brass drain tube that's used in bath room sinks. They cut them off to about 4 1/2" length, drill a couple of 1/4" holes about 1 inch down from the flange and put it in the tank filler hole. I haven't actually performed the task, so I can't confirm the details.
Richard Cameron

I've done the anti slosh plumbing tail piece explained above and it does indeed help, but the problem does still exist.

Alex
Alex Waugh

I'll have a look at the sink drain. In the meantime..... well.... it IS a primitive car.

I just can't believe 30,000 owners had to put up with this to keep the gas in the tank and off the paint when these were new cars.

A screw-on cap with a baffle and tiny breather hole would have been too expensive?

Just sayin'

....
MAndrus

M,
My father had turned a six inch rubber tube such that it friction-fit into the mouth of the filler. Before that, even when I partially filled the tank, I would get some gas leaking out when I cornered. It does eliminate the sloshing, but it makes for a tight fit when putting gas into the tank. I have had to fish it out of the tank on a couple occasions. He made it out of some type of gasoline impervious rubber tubing.
Safety? Fast?
Scott Ashworth - '54 TF
S. R. Ashworth

M,
the annular cork gasket goes on the filler neck not the cap. Soak it in water overnight and it will stretch in OK and the cap will close, the lid is spring loaded.
Google "MG TF filler cap leak"
also "Filler cap seal" in the archive here
Ray TF 2884
Ray Lee

If you purchase an aluminum dipstick, you will have an anti-slosh fitting and a Guatemalan in one.
Not sure how the cork gasket fits on the filler neck. I am not familiar with this. I will look.
Regards, tom
tm peterson

Who here is going to burn 16 gallons of fuel in one straight shot? I know I'm ready to get out of the car for a break before that so I just leave it a couple gallons below the top and no sloshing! On the rare occasion I feel the need to put extra fuel in (perhaps on a long distance journey), I just corner slower through the city until I'm on the open highway.
Steve Simmons

I found that I had to disassemble the entire cap and wire brush all the pieces and then install with the new gasket, several overlaid paint jobs (and at least one tank sealant job) had made it a very poor fit to the tank...
Geoffrey M Baker

I agree with Geoffrey, that a properly cleaned cap, and properly installed gasket should solve the problem. I never had a slosh from my 52 TD, back in the 1960's, and I drove rather spiritedly, including gymkhana/autocrosses and one school session at Lime Rock. It was my only car for 3+yrs.
Don't drive Emma that way, and don't fill the tank nowadays.
Al
54TF "Emma"
A W Parker

I have used a brass sink drain pipe for over 25 years. It is approximately 6" long and I drilled two 1/4" holes about 2" down from the flare. This lets air out when refilling.
Some of the drain pipes are slightly too large in diameter. I cut a lengthwise slit and it compressed enought to fit down the neck.
If I remember the cost is less that $6.00
Sandy
Sandy

i agrre with Sandy 6", it shuts off the filling nozzle a few gallons short of full. This gives the fuel enough room to expand, without overflowing when parked in the sun.
Len Fanelli

This photo is from the MG Experience site.
The smaller disc fits into the neck preventing most of the slosh leakage and the larger spring loaded disc seals on the cork.
As you can see the one fitted is split and the new one ready to fit.
Ray TF 2884

Ray Lee

Who sells this thick cork gasket? I looked on Mosses site and could not find one, didn't even see one on Doug Peltons site. PJ
Paul S Jennings

Steve, I hear ya, but this has less to do with cramming the last teaspoonful of gas than solving a problem.

We're on a quest because life isn't hard enough already.

.....
MAndrus

Brown & Gammons stocks the cork gasket. I fitted one recently and it makes a nice firm seal against the cap. Didn't find it needed soaking.
Tim Wilkinson

TOM,
>>>> A Guatemalan ??????

STEVE
Steve Wincze

Steve,
with the price of petrol here if you see it cheap, then you fill it up. $6 for 1 US Gallon.
I can stretch my MX5 (Miata) to 40 per Imp Gallon but the TF does 30 ish however I drive it. Even though they are both at 20 MPH per 1000 RPM
Ray TF 2884
Ray Lee

Moss sells the cork gasket, though it's kind of hard to find. It's part no. 293-600 GASKET, gas cap (for original cap) and costs $1.95. I got it to address the same problem. It helped but whether it was the new gasket or just using up some gas, I can't say for sure.
REG Bob

From memory,current TF fuel cap gasket was obtained from
Brown and Gammons-neoprene impregnated cork.I actually
used two(2) gaskets,one compressed upon the other for a perfect fit.No leaks at any stage over ten years.(The gaskets fit in the neck of the fuel filler.)

Cheers
Rob Grantham
TF3719("Aramis"),TF9177("Athos").
R GRANTHAM

You can easily make your own gaskets. Just buy some gasket stock and a razor blade. I do it all the time for vehicles that don't have a Moss Motors type place available. Been standard practice for a hundred years!
Steve Simmons

.... just remember not to seal it off entirely. You'll wonder why the engine runs for a few moments, then shuts down.

There cannot be a vacuum in the tank.

Gord C;ark
Rockburn, Qué.
Gord Clark

Martin at Abingdon Spares got back to me and at the present, orders are being taken on the phone. Their new web site isn't completed yet, but I believe their going to make it so we can order from it. PJ
Paul Jennings

A suitable size and section "O" ring inserted in the filler neck is a solution providing the cap is applying some compression force.
G Evans

This thread was discussed between 20/07/2015 and 24/07/2015

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