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MG TD TF 1500 - Carburetter Fuel lines

I need a little help from the other owners.

I am putting the carb to carb fuel line back onn the car and I need to know which side of the fuel line fitting faces the carb. The line has an undercut on one side and is flush on the other. I have not been able to find any reference to the correct assembly.


51 MG TD 10774
RG Taylor

Hey Rick,

Hope this helps...

Floatbowl, fibre washer, smooth side of banjo, smaller fibre washer set into indent, bolt.

Dave Braun


Thanks. I ordered new washers and Moss sent the same washer for both sides. I have a leak at the "assembly" and thought I might have the fuel line hooked up incorrectly.

RG Taylor

Dave, others have run into that same problem. The 'flush' side of the banjo fitting goes against the carburetor and uses a fiber washer that the banjo bolt goes through. The stepped side of the fitting requires a fiber washer whose o.d. is small enough to fit into the step machined into the fitting. Its i.d. is the same as the other washer, but its o.d. is smaller. If you try to assemble with the larger washer in both places it's guranteed to leak. The washer will unsuccessfully try to force itself into the recess and will not seal. If you can't get the proper washer from Moss, try Joe Curto at (781-762-SUSU). I think there's a thread on this in the archives.
Bud Krueger

Rick, here's my correspondence with Abingdon Spares about that problem. They had Joe Curto send me the correct washers:
A few weeks ago, while speaking with Bobbi, I mentioned that I think your washer #09-063 has a problem. Yesterday I dug out my vernier and made some measurements. Now I can quantify the problem. Here's what I've found.

Two of these washers are used at the fuel inlet to each carburetor. One goes on either side of the banjo connector (09-111) or its equivalent at the end of the inter-carburetor fuel hose. One washer goes between the banjo connector and the float chamber lid (09-047) where the banjo bolt (09-061) comes out of the banjo connector. The washer has very loose tolerances for this function. It only needs to be large enough in i.d. to fit over the banjo bolt with virtually no restriction on its o.d.

It's the other side of the banjo bolt where the problem manifests itself. If you look at the banjo bolt you'll see that it has a cylindrical surface machined just below the hex head. The 'face' of this surface is what needs to be sealed by the washer. The (outer) side of the banjo connector is machined out to accept this cylindrical surface of the banjo bolt. The washer must have an i.d. that will allow it to slip over the banjo bolt (measured to be 0.652") and an o.d. that is no greater than the diameter of the cylindrical surfaced machined into the face of the banjo connector (measured to be 0.8695").

The washers that I received from you have an i.d of 0.670" and an o.d. of 0.885". An 'old' washer has an i.d. of 0.652" and an o.d. of 0.866 in. When I reinstalled my float lids, after replacing the Grose Jets, I put a new set of washers in and tightened the banjo bolts to a reasonable degree. When I turned on the fuel pump to check for leaks I had fuel all over the place. I gave the banjo bolt another twist and tried again. Still leaking. A bit more torque on the banjo bolt and the leaking stopped. Went for a short spin to see how things were working and came back to the smell of fuel. Sure enough there was fuel leaking from the banjo connection. I took things apart and had a look. The outer washer was being pinched in an attempt to fit inside of the banjo connector. Fortunately, I still had the old washers. The old ones are a nice snug fit into the banjo connector and around the banjo bolt. The new ones are very sloppy

I'm glad that I caught this when I did. I just returned from a 1700+ mile trip and would have been very unhappy if I'd had a fire under the bonnet.

Bud Krueger

This thread was discussed between 02/04/2006 and 03/04/2006

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