Mopedmark Posted June 17, 2018 Share Posted June 17, 2018 (edited) Hi Zedders, as many of you will have found out many of our beloved cars suffer from the dreaded rust on the rear arches.There are a few things you can do, leave it do nothing and eventually your car will look really bad.Get it fixed with cutting and filler etc DIY, or get it done professionally and and have cut out re welded and re painted but it Will cost, anything from £300 plus just for starters per side and then you are hoping they done it right. Well now there is another option, fit Tarmac Sportz 50mm rear bolt on arches.i had the dreaded rust and fettled it every year but I knew I had to do something, well Chris @Tarmac@TarmacSportz Came up with the idea of me doing what I am about to show you and fit these rears to my beautiful car, after about 2 seconds flat I said ok let’s do it.this is first mock up I used masking tape to just hold it in place and roughly marked up and spaced out the potential holes for the bolts, The first thing was to cut the hole for the aerial, then I would say I spent around 1.5 hours to fettle the both ( I am a little picky on this, an hour would probably do) sanding blocks big files and little fettling files are what I used, you just need to get a couple of the edges straight and away you go. i measured 20mm all the way around and th spaced the holes for the bolts, a 6.5mm drill for this but a smaller pilot hole is advisable to use first. So with prep all done it’s time for Primer,With the weather very hot I painted the panels with 3 coats and left them to dry for 24 hours, next morning I wet sanded with 1500 grit ready for colour which in my case is Blade Silver paint code KY0 So after a further 3 coats of colour and 3 of clear, it was just down to time for them both to dry, after another 24 hours the final result was very pleasing and I could then start the cutting.The day came when it was time to start the cutting, first off I had to mark up the holes for the bolt holes, as I was using 6mm Rivnuts as these fit into the body and the back pulls up and locks you simply screw your 6mm bolt into them like a fixed nut.With all the holes drilled and rivnuts fitted it was grinder time.The side was taped us and I cover the car with old covers because of the sparks, you will notice 2 lines on the arch, cut the lower one as this splits the double skin, this is important, you then do the second cut which is very important NOT to cut through the second inner skin.This is what you are left with and you can see some rust on the inner arch which you cannot get rid of without cutting the outer arch, I did some grinding back and treated this a little before the next stage. This is the important bit as I have seen some of the Rocket Bunny boys in the States Not Do, I marked the inner arch and then cut them upwards with very sharp metal snips, you then have to panel beat them all upwards and fix them back to the outer arch, this may take 2 people, one to hold one to drill and then pop rivet to hold into place.On these photos I have dropped the air suspension to make sure I have done it all correct (which I had) I rounded the ends a little also, you really have to take your time doing this and it’s the most time consuming part of it all at least a couple of hours per side. You do have to cut a little bit of rear bumper but you do not have lose the fixing which connects and holds the bumper to the body, the ends are then fettled with the dremmel to smooth out and get a clean look.I used some P40 fibreglass body filler to seal it all then coated it all with some under body seal. 50mm spacers from Chris @Tarmac@TarmacSportz We’re added to give the finishing look and make the wheels fit the new arches.Finished apart from the Hexis Super Chrome Vinyl to be added, and the finished article is Complete Thanks for looking I hope it all helps any problems fitting give me a message thanks Edited June 17, 2018 by Mopedmark 6 Quote Link to comment Share on other sites More sharing options...
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