The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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 Post subject: Sill Vent Holes?
PostPosted: Sun May 13, 2018 7:54 am 
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Should there be any?
I had my outer sills replaced last year with club panels. There is a nylon plug under the carpet at the rear of each sill, so I stuck a video probe down there and everything looks good.
I then drilled a hole under each treadplate and sprayed a 500ml can of Dinitrol 1000 in each sill. That was in yesterday's warm weather, I haven't been to check the garage floor since.....

The question is - do I seal up the sills again or should there be some sort of breathing hole somewhere?

Also if there is a nice line of dinitrol under each sill that means the welds aren't fully sealed - should I just underseal them or is there a better method?

Thanks in advance.


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 Post subject: Re: Sill Vent Holes?
PostPosted: Sun May 13, 2018 10:11 am 
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There are std a few drainholes in the sills. When spraying anti corrosive in the sills you should have seen it dripping out within seconds.

Jeroen.

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 Post subject: Re: Sill Vent Holes?
PostPosted: Sun May 13, 2018 5:41 pm 
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I also believe you need to drill some holes from the inside of the car to get into the jacking point box sections. Can someone who has repaired this area please confirm this fact.


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 Post subject: Re: Sill Vent Holes?
PostPosted: Tue May 15, 2018 7:08 am 
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I also believe you need to drill some holes from the inside of the car to get into the jacking point box sections. Can someone who has repaired this area please confirm this fact.
Think you're correct....suspect I drilled in from the footwell horizontally...this pic should show the inner construction.....

Image

Image

If you take the panel of by your accelerator foot you can get in behind all the panels.....

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 Post subject: Re: Sill Vent Holes?
PostPosted: Tue May 15, 2018 9:49 am 
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The drain holes in OE cills were created with a pressed inflection in the panel which results in a slight gap in three locations; due to production limitations, these are not reproduced with the club cills.


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 Post subject: Re: Sill Vent Holes?
PostPosted: Tue May 15, 2018 9:34 pm 
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The drain holes in OE cills were created with a pressed inflection in the panel which results in a slight gap in three locations; due to production limitations, these are not reproduced with the club cills.
When I fit the club sills (or ANY aftermarket copies to anything) I use a screwdriver and a panel clamp to reproduce the drain slots. Every little helps!

Steve

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 Post subject: Re: Sill Vent Holes?
PostPosted: Wed May 16, 2018 6:04 am 
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Quote:
Quote:
The drain holes in OE cills were created with a pressed inflection in the panel which results in a slight gap in three locations; due to production limitations, these are not reproduced with the club cills.
When I fit the club sills (or ANY aftermarket copies to anything) I use a screwdriver and a panel clamp to reproduce the drain slots. Every little helps!

Steve
Unfortunately mine are fitted, and no drain slots! Any chance you can sketch roughy where they should be? I guess a dremmel or drill will have to be used now.


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 Post subject: Re: Sill Vent Holes?
PostPosted: Wed May 16, 2018 2:39 pm 
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As has been stated above the OE Sills have three drain points along the joint between the inner and outer Sills, one towards each end, and one in the middle. Elements of the drains are included in the Sill inner and outer:

The inner Sill has indents as shown in picture 2
The OE outer Sill is not flat from the bottom of the radius below the doors to its flange, is it indented upwards on it's lower horizontal face except for the areas adjacent to the inner sill indents (as shown in pictures 3 & 4). This allows for a gap between the outer Sill bottom, and it's joint with the Sill Reinforcer as shown in picture 5. Non OE replacement Sills are flat in this area due to the limitations of the fabrication processes used for their manufacture.

The front jacking point is closed off, the rear is not as there is a cut out in the reinforcer in this area, but filling the rear jacking point with cavity protection through the main body of the Sill would probably be problematical.


Attachments:
File comment: Sill inner, reinforcer and outer
Sill1.JPG
Sill1.JPG [ 276.52 KiB | Viewed 225 times ]
File comment: Rear of inner Sill
Sill2.JPG
Sill2.JPG [ 174.44 KiB | Viewed 225 times ]
File comment: Rear of Sill
Sill3.JPG
Sill3.JPG [ 181.24 KiB | Viewed 225 times ]
File comment: Front of Sill
Sill4.JPG
Sill4.JPG [ 243.93 KiB | Viewed 225 times ]
File comment: Sill reinforcer against outer Sill showing drain point
Sill5.JPG
Sill5.JPG [ 297.6 KiB | Viewed 225 times ]
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 Post subject: Re: Sill Vent Holes?
PostPosted: Thu May 17, 2018 8:02 am 
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Thanks for posting those pictures, it saved me dragging mine out of the cellar!


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 Post subject: Re: Sill Vent Holes?
PostPosted: Thu May 17, 2018 9:08 pm 
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Many thanks for the perfect pictures, shows how it should be. Now I have to figure out what I'm going to do!


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 Post subject: Re: Sill Vent Holes?
PostPosted: Fri May 18, 2018 7:35 am 
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If you drill holes you will expose the mild steel so should treat the holes with something like galvafroid to maintain the zinc protection.


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 Post subject: Re: Sill Vent Holes?
PostPosted: Fri May 18, 2018 12:26 pm 
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I remember way back in 1974 when my father bought a new Renault 12 he took it to Ziebart who drilled 3 holes in the lowest point of each sill, placed a rod in the hole and pulled it backwards and then sprayed loads of black wax in there. The said that by angling the holes as they did any water would run out when accelerating. They didn't put bungs in the holes. I had that car up until about 1994 and then had to give it up because I lost my storage space. The sills were still like new after 20 years. (his previous Renault 12 had rusted badly in the sills by the time it was traded in aged 3!)

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