Sill Drain Holes

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pbar
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Sill Drain Holes

Post by pbar » Tue Nov 17, 2020 6:34 pm

Could someone please explain where the sill drain holes should be? Or show a pic. The Capri has sunroof plastic pipes which end inside the sill area, so rain is effectively poured into the sills (good idea!) which must then drain off somewhere. I know that some people extend the drain pipes so rain runs straight onto the tarmac which sounds better.

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Re: Sill Drain Holes

Post by stevemarl » Tue Nov 17, 2020 10:47 pm

Paul, there are several drain points along the sill, D shaped pressings in the outer sill skin. If I put WD40/XCP down the sunroof drain pipes, these are the holes from which it emerges. (I know, it needs a clean :) )
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Re: Sill Drain Holes

Post by Lord Flasheart » Tue Nov 17, 2020 11:09 pm

Great pic, explains it very clearly ;)

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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 9:05 am

stevemarl wrote:
Tue Nov 17, 2020 10:47 pm
Paul, there are several drain points along the sill, D shaped pressings in the outer sill skin.
Thanks Steve, never knew those D shapes signified the holes, interesting info that.

You couldn't take it a step further could you please, and (probably easier to use a stock pic off the internet?), using a full side view of the car mark on the positions of the drain holes please.

It's info which I just can't seem to find anywhere.

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Re: Sill Drain Holes

Post by stevemarl » Wed Nov 18, 2020 9:15 am

Paul,
may not be able to get full side of my car as it`s in garage, but I can certainly do measurements later.

edit: drains marked in white
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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 9:45 am

Thanks Steve, yes that's why I mentioned perhaps using a stock image off the internet, to mark them on.

Edit: You beat me to it, thanks Steve that's great :)
Last edited by pbar on Wed Nov 18, 2020 9:52 am, edited 1 time in total.

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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 9:49 am

The very first hole, I assume that's like a 'double' hole then, it goes through the sill and also through the bottom of the wing? (As the wing flange overlaps the sill in that area)

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Re: Sill Drain Holes

Post by stevemarl » Wed Nov 18, 2020 10:07 am

I couldn`t honestly say Paul, I would assume so but you can`t really see? In fact, yes, looking again, the wing `overlays` the sill so it must.
Last edited by stevemarl on Wed Nov 18, 2020 10:10 am, edited 1 time in total.

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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 10:09 am

Thanks Steve, I bet a lot of people inadvertently cover that one up when fitting pattern wings, assuming those don't come with a corresponding hole.

Seems such a strange idea to purposefully allow rain to enter the sills, it's a wonder that any of these cars are left!

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Re: Sill Drain Holes

Post by stevemarl » Wed Nov 18, 2020 10:51 am

I agree, it can`t have been that difficult to simply extend the tube down through the sill. I think though that when new, the pipe does empty pretty much straight above the drain holes, so providing the inner surfaces have been treated (Ziebart/DiNitrol) and the drains kept clear, it`s not that big a problem (also when new the sunroof seals maybe kept out the bulk of the water, the drains just stopping the odd drip entering the cabin? It`s when the drain holes (which are only small ) get clogged, then the sills can fill with water which can`t drain out. How many people would have checked the drain holes were clear every service? Apart from me - after owning a VIva!

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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 11:37 am

And I bet that loads of people who had their cars professionally (or diy) undersealed, had those holes clogged/filled up.

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Re: Sill Drain Holes

Post by stevemarl » Wed Nov 18, 2020 12:04 pm

Oh absolutely! any kind of wax in the sills will clog the holes, which many wouldn`t even be aware of. You need to probe them afterwards to lear them. Again, how many did?
These were just everyday cars, no-one really thought of them as they do now, `icons of the `70s` etc, they weren`t really cared for, most were just owned for a couple of years then traded in: by the 6th owner it`s probably getting a bit, how can I put it.... you`ve seen the end of `Black Beauty? :cry:

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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 12:23 pm

You made me Google it -

After a traumatic downfall and coming close to death from overwork, Beauty at last finds a home in a beautiful spot with people who will care for him for the rest of his days.

Very apt!

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Re: Sill Drain Holes

Post by Paul G » Wed Nov 18, 2020 1:41 pm

Regardless of the factory drains I drilled 8 mm holes directly under where all the sunroof pipes were so water would drain straight out. I also waxed inside the sills and after a few weeks I poked out the factory drains so they could flow if necessary.

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Re: Sill Drain Holes

Post by pbar » Wed Nov 18, 2020 1:43 pm

Good idea Paul, and very wise too. I may just do something similar.

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Re: Sill Drain Holes

Post by Andrew 2.8i » Wed Nov 18, 2020 4:06 pm

You could test the sill drain holes by spraying WD40 into the drain holes in the sunroof surround. You should see the WD40 dripping out, if not, the holes or tubes may be blocked.

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Re: Sill Drain Holes

Post by Bug » Thu Nov 19, 2020 10:05 am

You all seem to have missed the fact that Paul looked out his window at the crappy weather and thought, "I know, I'll get someone else to roll around under their car for me, while I sit in the dry with my laptop and a hot cup of cocoa."
:xd: :xd: :xd:

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Re: Sill Drain Holes

Post by pbar » Thu Nov 19, 2020 12:17 pm

Bug wrote:
Thu Nov 19, 2020 10:05 am
You all seem to have missed the fact that Paul looked out his window at the crappy weather and thought, "I know, I'll get someone else to roll around under their car for me, while I sit in the dry with my laptop and a hot cup of cocoa."
:xd: :xd: :xd:

Martin that is totally untrue and I resent that - it was a latte :)

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