 | Home > Maintenance & Modifications > Mantec RAI - refitting |
 
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610   
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Drill out the rivets and fit some rivnuts? If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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11th Jan 2014 9:24am |
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| VeeTee Member Since: 06 Mar 2011 Location: Somewhere Posts: 1512 
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Do you mean the rivets in the pipe (RAI) or in the window frame? Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold) 1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold) 1975 Series III 88 V6, Light Green (sadly sold) 1996 Defender 110 CSW 300 Tdi, Epsom Green (sold) 2000 Freelander 1 TD4 3-drs, Silver (sold) 2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold) MySite |
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11th Jan 2014 10:06am |
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| Leenorthants Member Since: 08 Sep 2013 Location: Silverstone(ish) Posts: 856
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I imagine it's in the frame, suggest that you drill out the rivets, and tap some bolts in the frame, I have always fitted mine this way and never had an issue.
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11th Jan 2014 10:14am |
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| VeeTee Member Since: 06 Mar 2011 Location: Somewhere Posts: 1512
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I did mine with nuts and bolts, it is easy to to remove the trim so yo can get behind the window frame. Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold) 1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold) 1975 Series III 88 V6, Light Green (sadly sold) 1996 Defender 110 CSW 300 Tdi, Epsom Green (sold) 2000 Freelander 1 TD4 3-drs, Silver (sold) 2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold) MySite |
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11th Jan 2014 10:36am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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I gathered it was the frame? If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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11th Jan 2014 10:37am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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As an afterthought I am not sure of the support arrangement on a Mantec but on my Safari the bracket was beginning to tire with the powdercating beginning to flake and corrosion setting in so I got a stainless bracket made and simply stuck it with Sikaflex to both the frame and the snorkel. It negates the requirement for any further drilling and is still rock-solid 7 months later.
Old...which the powdercoating was showing signs of corrosion. Click image to enlarge New....glued. Click image to enlarge If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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11th Jan 2014 10:44am |
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| gavinpm Member Since: 19 Oct 2012 Location: Wiltshire Posts: 117  
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Gents
Many thanks for your replies, much appreciated. In my opinion this particular RAI is a crappy design in the way it is mounted to the window frame, it comprises of two small individual brackets around 8 inches apart (see photo), and I don't think this is good enough for the job. The other photo shows where it was mounted on the frame and you can also see where it has rubbed the paint off adjacent to the top rivet, which happened when the top rivet sheared first and was allowed to vibrate. K9F, I like your idea but don't think this design lends itself to it. Cheers Gavin PS hoping the upload of photos has taken place ! |
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11th Jan 2014 5:26pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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Gavin,
Click image to enlarge The design would work. But with a little fettling. Instead of fixing at the two mounting points with rivets why not bolt a flat piece of 1mm 316 grade stainless to the RAI and glue as I perhaps suggested at the two points where it's rivetted to the frame? You could also just have just a single piece the 8 inches long and bolt to the two RAI mounting points and glue to the frame accordingly? The brackets look shot anyway. Pinched the photos from your gallery.
Click image to enlarge If you measure up and are prepared to wait I could get the steel sourced and cut for you accordingly as you're perhaps not a million miles away. Let me know via 'pm.' If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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11th Jan 2014 7:05pm |
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| Waldo Member Since: 18 Jul 2010 Location: Bit South of Manchester Posts: 240
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Those rivnuts look tiny and that may be half the problem.
Obviously there isn't going to be much vibration which causes tension and compression through the axis of the bolt and rivnut (which would be fine) However most vibration will be up down, forwards backwards which is effectively going to be trying to get the bolts to shear through. My recommendation would be to drill out the old inserts and widen the holes. Then pop in a couple of avdel inserts into the frame (the largest diameter that will fit) This will then enable you to put in a larger diameter bolt which is less likely to shear. Especially if you got some of high tensile ones As previously suggested renew the brackets on the RA and put a strip between the two I but with holes appropriately sized for the new avdel inserts. Then reattach. Alternatively (if the brackets which come off the RAI are metal) Simply weld a strip between the two brackets with maximum weld length. Then attach by either gluing or bolting using avdel inserts. Kind of a variation on K9F's suggestion The reason why gluing works is that it spreads the load over the whole strip rather just through the two small rivnuts So if you do go for system one perhaps put a couple of extra holes in the middle of the strip and frame so you have four points of contact. Hope that makes sense (it did in my head.. honest) Will Defender 90 XS TD5 (03 Reg) |
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11th Jan 2014 7:28pm |
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| ARC99 Member Since: 19 Feb 2013 Location: North Yorkshire Posts: 1831 
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I don't think those are rivnuts but pop rivets. Don't make old people mad.
We don't like being old in the first place, so it doesn't take much to  us off.
Richard |
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11th Jan 2014 7:41pm |
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| Waldo Member Since: 18 Jul 2010 Location: Bit South of Manchester Posts: 240
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Ooops, my mistake... Even worse then
 Defender 90 XS TD5 (03 Reg) |
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11th Jan 2014 7:51pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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Just drill out the two rivets, the holes left behind will be sufficient for a decent sealant to get a 'key' to the frame. If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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11th Jan 2014 9:06pm |
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| gavinpm Member Since: 19 Oct 2012 Location: Wiltshire Posts: 117
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Thanks once again - you have given me something to work on
Cheers Gavin |
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12th Jan 2014 10:33am |
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