Hello,
I've heard many times on this forum that replacing rubber pieces/hoses in the fuel delivery system is a must do on our aging cars. So today I drained fuel out of the tank and sump reservoir and climber underneath the car to start the process.
I am looking for suggestions and information about doing this. If anyone knows where to source these parts at reasonable price, hose sizes, any hints...

The circled in red pieces I couldn't access as they are behind metal plate, is there a trick to it. ( I feel like parts 5, 11, 3, 10, 2, and 9 can all be replaced by one piece of metal(cooper?) pipe. I do not see a need for rubber hoses up until engine. )

I did some searching around and will do more, but if someone can point me in the right direction I will really appreciate it :-)



Thank you!

 

That diagram looks to me like it is referring to the lines that run under the car. I think that those rubber pieces are to allow the pipes to bend as then go over the rear axle cage. Parts 4 and 10 in the diagram are the exit points from the boot corners. On the V12 of this vintage the under car pipes are in two parts, but follow this same path.

 

If you can remove the steel lines and keep them in one piece a local hydraulic shop will replicate them for a reasonable fee. If you search the web under xjs fuel lines there is a post giving all the sizes and quantities some kind soul has put on.

 

Thank you for your answers and suggestions. After spending few hours looking for part numbers and suppliers I gave up. After inspection I can see that my tank was replaced and hoses inside the boot look ok ( except one I already replaced ). The rubber piece in the arch over wheel will have to wait. The two hoses from the engine (1 and 7 in diagram) I replaced with generic fuel injection system hose from autozone. The supplying hose was a bit of a pita to disassemble - I had to cut end clumps(?) with a saw to free connectors and used FI clumps to connect it back. The return is just a piece of hose, nothing to it.

 

I'm sure somebody will explain how I am wrong, but on my 2 XJS, a 78 and an 83, the only fuel hose deterioration I saw was on the hoses in the engine compartment, particularly in the Vee of the engine. The other hoses did not look new, but they also did not look cracked or otherwise damaged. I only replaced the hoses in the engine compartment. So far, that is working for me. If I was driving a 1983 any other car, I wouldn't worry about them either.

 

For me the hose from tank(sump) to fuel pump literally broke in half when I was replacing pump. It was brittle and I ended up washing the boot with gas (not to mention plugging broken hose with my finger until I figured how to deal with it). But I inspected them all after that.

So for your 78 and 83 - I would definitely check all those hoses in the trunk.

 

FYI, the flexible hose over the rear axle cage can be changed with the pipe in situ on a V12, and probably on your car too. This hoes is subject to road debris, stones, etc etc and well worth doing. Just check that the steel pipes in that area are OK, mine were porous through rust!