Front air vent repair

I've taken the front vent cover off and noticed some rust inside, it seems the rain is getting through the leaf guard and sitting my question is how should this water drain away, the leaf guard is damaged at one end

 

There's a drain which run out of the bottom and connects to large-ish pipe which exits under the nearside wheel arch ..
Dunno about different models but that's on a '75 LHD .

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^^^ WHS 73 -79 had drain pipe like this. No idea on the earlier old mans vans



Goes in middle here

 

I had the same rust behind the fresh air grille. Treated and painted. From memory I believe when the two air vents are opened, levers on the dash, should be rubber seals behind the vent plates and any water getting behind the open vents drains down through a length of plastic hose to under the van. Hose can be seen if the kick panel removed inside the cab. My hose was missing and I just used a piece of washing machine hose cut to size.

 

As above. If refurbing this area it's worth replacing the rubber seal round the flaps as it can be draughty in winter. Domestic door seal works fine.

 

I've no hole maybe someone has filled it in, on each side there is a dip in the corner which looks as if the water could drain from a PO has put a bead of silicone in which I've scrapped out, mine is a 71

 

If you mean this bit forward of the flaps but behind the grille then there’s no drain holes, in early or late!

 

That it, so how does the water drain out?

 

Through the rust hole the water creates!

 

Have you got a hose connection from the big triangular airbox inside as per pics?

 

Plenum. I meant plenum.

 

No not that the flat bit in front of the flaps o matron towards the front

 

When the flaps are open, you will get rainwater coming in. Where does it go?

 

My flaps are sealed closed so the water pools in front of them does it just run out under the grill ?

 

Ah, right. From memory, there aren't any drainholes in the front box - or are there? Can't remember. Where would the water go?

 

What I think has happened the PO has run a bead of silicone stopping the water, I've cleaned this off so hopefully the water should now just run off

 

As mentioned by @SundialCamperSpecialists , there`s no drain at the front BEFORE the flaps , just the airbox behind which has a hosepipe sized runoff that exits under the wheelarch ...

 

But run off...where?