Whilst attending to some rust issues on the R this morning (it's a Bank Holiday and it also looks like it will stay dry).

I pulled off the RHS front wheel arch liner, my RH wing is quite badly gone at the lower edge and also the leading edge of the sill beneath.

I noticed that there are two rubber pipes hidden behind the liner, the odd thing is that one was attached to a bracket and put through a hole in the liner, I presume for drainage?

Doubly odd is that the bracket is made to hold two pipes, and there's a blanked-off hole (that would need to be cut out).

What do these pipes do (my first guess is sunroof drainage) and should both be piped to the outside? I would guess that if they both drain some fluid having it collect behind the wheel arch liner is a bad idea if I want to keep the tin worm at bay.

Should I clamp both pipes to the bracket and cut out the blank to allow both to drain/vent/breathe/ outside the arch?

 

Some pics would be helpful....preferably one of the side area you speak and then a couple of the piping you describe.

 

Will do,

a pic of the dodgy wing, the bracket and hole, pipes in the wheel arch with rusted out hole behind, and pipes, bracket and hole.

 

Yes, they are both for the sunroof and as you i thought that it was strange not to run both pipes through the liner so,I punched the pre-marked hole in the liner and run both pipes to the outside of the liner

The question is why would Jaguar did it that way??? make no sense whatsoever

Now, thinking about it, Im' not 100% sure that both pipes are for the sunroof. The sunroof has 4 drain pipes, 1 at each corner. Can you check if you also have another drain pipe at the other front side?
If there is one, therefore 1 of the pipes on the RH is not for the sunroof and could be for either a scuttle drain or A/C

My logic being that all cars have at least 1 drain pipe ( the 1 going through the liner) and even if provision was made to run 2 pipes through the liner, Jaguar decided not to run the sunroof drain through it.
Like that they only need 1 part number for the liner instead of 2

 

On each side, one is for the plenum and one for the sunroof (where fitted).

Having one of them on each side just drain into an already rust prone
cavity was bad workmanship on the part of the Jaguar assembly line.

The provisions are there to run them both outside as provided by
engineering.

That is what I have done.

 

A bit better now, wing and sill plated and welded up. Treated with some decent undercoat.

Two short lengths of ordinary garden hose mean that both pipes now reach the bracket and holes and pass a couple of inches beyond so there's little chance of them popping back into the inner wing recess at a later date.

Have to do the same pipe mod on the passenger side, the corrosion isn't anywhere near as bad on that side, mainly stone chip related bubbles higher up on the arch.