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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - Carburettor gland seals

After trying on three occasions to stop the fuel leaking from the jet seals on the front carburetor I decided enough was enough and that I would give teflon seals ago. My problems are now over with perfect sealing. I used -010 Teflon "O"rings in lieu of the traditional cork seals and -210 nitrile "O"ring in the large jet screw.
Cost $1.80 for each teflon "O"ring and about $1.00 for the nitrile "O" ring. Total cost $4.60.
The rear carburetor is not leaking and it has cork "O"rings however should it ever need the seals replacing I will use teflon.
At this stage I am totally satisfied however I guess time will tell.

John...Sydney
J Walton


I used the Moss "leak Free" replacement 365-420 $0.89.
They do not leak BUT, after pulling out the choke (enrichment) to start, the jets don not return properly. I must open the bonnet and manually return them to the seated position.

Jim B.
JA Benjamin

Jim,
Is your spring strong enough? You may need to change it to a stronger spring.
John
J Walton

I had thought of that but I am at a loss as to where to find a stronger one.

Jim B
JA Benjamin

You local hardware store may be able to help you or a motor spare parts store.
J Walton

I worked my way through cork, fiber and teflon seals with hit and miss success. I finally bit the bullet and bought the Burlen H Type 'Superdry' Jet Bearing Seal Kit Part # WZX 1775. Pricy but no leaks and the jets move easily in the bearings. No affiliation with Burlen, just a happy customer.

Tim
TD26711
Tim Burchfield

Jim B,
Just a thought. If you can replace the twisted Bowden cable for the choke with solid Piano wire it will push the jets back up and you won't have to open the bonnet. As a working alternative I used solder on the last 6 odd inches of the Bowden cable to make it stiff and that works too. Also check all the pivot point on the carbs. Oval holes or worn pins can cause a lot of slop you don't need.
Rod
Rod Jones

Jim B,
I had the same problem. I got new springs from Joe Curto and polished the jet and other brass surfaces. I also re-soaked the cork seals in oil (I had cheated on that).

I think my fatal error was leaving an extra seal at the bottom of one of the jet assemblies - somehow I didn't see it when I rebuilt the carb. Seems to work fine now, but the jets do get some varnish when they sit for a while.

Jim
J Barry

This thread was discussed between 22/11/2017 and 30/11/2017

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