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Old 13-11-2015   #16
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Re: Roof rails on hi-roof DoblÚ

Hi, after reading this thread I managed to pick up a set of Volvo roof rails and I had a question about fitting them. Should the feet on the rails line up perfectly in the middle of the indents on the roof cross sections? As the feet are an inch or so off the centre. Thanks.
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Old 13-11-2015   #17
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Re: Roof rails on hi-roof DoblÚ

Hi,

The M5 thread in the feet are pretty much in the centre of the each foot. The rivnuts need to be fixed centrally in the indents which is directly over the centre of the roof cross member. It looks right but also by default the feet therefore line up with the indents in the roof.

The rivnuts have quite a thick flange which raises the foot up a couple of mm above the indent (to about level(ish) with the roof surface) so even if the foot wasn't exactly in the centre of the indent (resulting in a few mm of foot overhanging the edge of the indent) it shouldn't rub on the surrounding roof surface. You can always take a file to the underside of a foot if you thought it was a bit close.

With the feet positioned it's now up to you to carefully bend the hollow rails to fit between them. If I remember the shorter rear section is just cut to length but the front length needs cutting to length and compound bending. I found that bending a little at a time, gradually shortening off and testing for fit was the way. It's worth spending the time!

Hope that helps

Cheers

Ron
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Old 15-11-2015   #18
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Re: Roof rails on hi-roof DoblÚ

Thanks for the feedback! I didn't realise from the original thread that you cut both the front and the rear of the rail to size, that's why the first two feet seemed a little off centre. I'll bear that in mind when I'm measuring it up again. The other question I have is: Do I need any special tools or replacement plastic ends when removing the ceiling fabric to get into the cross sections from inside? Where can I find these? I'm assuming the little plastic caps that hold on the ceiling fabric will have to be replaced when removed? Sorry if the questions are obvious but I'm a newbie to this sort of thing.

Thanks again for the feedback.
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Old 15-11-2015   #19
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Re: Roof rails on hi-roof DoblÚ

Hi,

Photos attached showing dimensions between feet.











Yep, the plastic fixings snap off, some are recoverable. Once you get the ceiling down you'll see that they push into a 7mm (or something similar) hole in the bodywork. What I did was to fix M4 rivnuts into these holes and fix the lining back with 15mm long M4 Furniture handle screws (they've got a 10mm diameter head) with large diameter (16mm) 2 piece screw caps.



Cheers

Ron
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Old 17-11-2015   #20
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Re: Roof rails on hi-roof DoblÚ

Hi Ron,

That's great info and I'm sure it'll help once I get round to installing the rails. Not sure if the pictures uploaded properly but I can't see them on my ipad. One last question! Is there anything I need to do to make the drilled holes watertight? Thanks again.
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Old 18-11-2015   #21
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Re: Roof rails on hi-roof DoblÚ

Hi,

The photos should show up, but if you can't see them then here goes:
Photos 1 & 2 show a steel rule between the aft inside (uppermost) face of the centre foot and the rear foot/tube joint. This measures 445mm.
Photos 3 & 4 show a steel rule between the fore inside (uppermost) face of the centre foot and the front foot/tube joint. This measures 712mm.
Photo 5 shows the ceiling screw cap in place.

I dabbed some Waxoyl on the holes in the roof. The rivnuts are tight enough to seal on their own without any additional sealant. The closed cell foam sandwiched between the foot and the roof won't let anything through. Passed the high pressure hose test!

Good luck

Ron
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Old 04-12-2015   #22
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Re: Roof rails on hi-roof DoblÚ

Thanks for all the info. Do you know what the maximum load the roof on the high top Doblo can take?
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