18 replies to this topic

[Pottrell]

Hey guys,

 

 

When it rains (or if I pour water from under the check strap seal), within seconds water starts coming out from under the cross member section inside down the gap in the floor. I'm completely at a loss because there are absolutely no holes/gaps that I can see!

 

I've looked around on the forums and looked into oversills and that they should have flutes to allow water/air to circulate?

 

 

Is this correct?

My oversills look like this:

 

They should look like this?:

 

My concern is that, uncovering these holes would surely promote more rust will it not? It would mean moisture can get between the sill and the actual bodywork?

 

Water coming out from:

 

 

Edited by Pottrell, 19 October 2014 - 01:27 PM.

[Big Man]

Hi,

 

  There are a few post on this,  the general consensus (and I agree) is that there should be a gap in the raised bit (on the indside facing the underneath of the car) this is to allow water out.   Mine did not have the gaps so local mini specialist being aware of the issue just drilled a few holes in each of the raised bits form underneath.

 

  If you do a serach there is quite a recent thread covering this but dont know how to ad links !  

[Big Man]

http://www.theminifo...-cross-section/

 

 

Try that hope it works

[Pottrell]

So drilling holes in the correct places should stop water from accumulating - My next question is. How is the water getting in? Seems a bit strange to me!

[Big Man]

Not sure how correct it is but I was tol they are drain hole for run off etc.

 

All I can say is my mini had oversills fitted without the holes.   The day I bought it driving about 100 miles back in torrential rain both footwells literally filled up with water... i thought floor was rotten so took it local mini specialist who popped it straight on the ramp,  looked at the sills and drilled them (free of charge ..Willimas mini peterborough top bloke) never had an issue since not spot of water inside the car!

 

So it worked for me and the holes should be there..why is a mystery im afraid.

 

Cheers

 

BM

[Pottrell]

Sounds like I should get the dremel out and sort out some holes for the sills then! Bit uneasy as to how 'future proof' this will be though

[Marco1972]

If it were my car I'd have those removed and the correct sills fitted

Pound to a penny who ever fitted them didn't protect the internal structures with any kind of paint or wax and the fact that water has accumulate in there will only mean one thing corrosion

Your car will last longer and hold its value with the correct sills fitted

[Rog46]

Even if from nowhere else (and there are lots of other ways) every time you are in your mini, or whenever the temperature drops there will be condensation on the inside. That inside on the roof runs down the A, B and C posts into the sills. It needs to get out! As well as letting it out you need to stop it destroying the sills etc. on its way through by injecting cavity wax into the sills and into the ABC posts

[sonikk4]

A lot of the time when oversills are fitted there is corrosion behind the jacking point. This area leads into the crossmember so if there is water getting into the void behind the oversill say from a pinprick hole in the flitch then water could build up enough and work its way behind the jacking point and into the crossmember.

 

Now personally i would be taking those sills off to see exactly what is going on. 

[Laughing Gravy]

...just been through all this too. The posts above are spot on...unless you know exactly whats under the oversill you need to get in and have a look. If you wait until it's dark and shine a torch through the crossmember drain holes at floor level back towards where the oversill meets the floor/footplate you may be able to see if there is any corrosion..if not try drilling holes and putting drain plugs in for the time being...but you'll need to have a look under unless you can get a clear and honest answer as to what's under there and how well the oversills were proofed before and after fitting.

[Pottrell]

I've tried to get hold of the previous owner with no luck as of yet to see if he knows anything more.

 

All I know is the "the inner and outer sills have been replaced" - That was in 2002! So perhaps it might be worth drilling into the covered outer sill and get some waxoyl in there? I still really want to find out how water is getting in though!

[1984mini25]

 

My oversills look like this:

 

 

 

 

 

 

from the looks of it you don't just have oversills, but also the cover inner sills witch sit over and leave the ends of the crossmember open. Plus is looks as if the inner sills (witch are actually originally pat of the full floor pressing) haven't been fully welded.

[Pottrell]

Cover inner sills?

 

So two problems;
1. Water coming in somehow on passenger side between under the check strap and behind the wheel
2. Oversill fitted, Outersill would probably be more beneficial and Innersill needs to be checked*

 

 

* Just got a photo of the inside of the crossmember section... Standing water! Eek..

 

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[1984mini25]

Cover inner sills?

 

Are these....

http://www.minispare...CFcKWtAodbDUAbA

 

Witch area total bodge as the inner sills (witch are part of the floor) run from the flitches all the way back to the rear sub frame headboard. those panels above only cover the inner sill sections were the carpet would be, they don't box in the ends of the cross member or inner sill sections in the rear companion bins, being a common and structural rot spot.

[sonikk4]

Looks like you need to cut the lot out to get things correct here. Too much bodgery going on which means things will only get worse.