You'll be joining a que for that lad. It is as you now know, a known but not always recognized issue with a few Jlr vehicles... It's pretty poor really and it does nothing for their reputation..
I honestly don't know what to say to help but I do feel you 🙁
Are you putting a touch of grease on the inner lip before assembly?
The argument is that if you use oil it can create a gateway for oil to escape and that before we get to ptfe plastic seals and their dry resting period😵
No problem my mate. Are the seals sat flush with the outer casing or set back. Landrover had a habit of setting seals into some casings by 4-5mm and then some sat flush with casing faces🤔
What's the sealing face like on the shaft?
Is it scored and if it is can you rub some emery cloth around to smooth it out. If you can get a finger nail in a score line it may be needing to be changed😬
If they've rotted, some heat, oil and a good pair of mole grips.
Or cut the buggers off with a grinder👌
Then cut and make the old bolts flush and drill then out to fit bolts if you're using the part again 👍
You may find the ignition switch controls more than one circuit 🤔
If your goïng to remove it to replace it, you've nothing to lose trying to clean the contacts 👍
Just to note, any difference in the position of the upper caps on the fip when replaced.
If not exactly where you found it, it'll either not run and or idle very low or idle very fast, like very fast!! 😬
The only reference you really need is the fip body relationship to the casing it's bolts too.
Logic says as you have noted it should all be in place on the engine side.
The only thing that can move is the fip drive shaft.
Don't forget as the chain stretches all the references go out the...
Are you doing the top cap seals, upper and lower caps?
They can be done with the pump on the engine if you haven't gone to far dismantling the pump.
The injector head can also be done in situ.
These three are the most popular seal fail issues 🤔but the other seals can fail. 😬
Just a few taps around the yoke assembly needed nothing major kiddo. 👍
We've got 38' with a phased prop and a 38' without, it's a good question about phasing 🤔