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welding for mot

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Old Mar 2, 2006 | 09:47 PM
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Default welding for mot

im gunna have a go at welding the two little wholes on me rs turbos floor up for its mot (somo dumb ass jacked it up in the wrong place)

im gunna use a mig welder, my question is, ive got an old bonet and a few doors, i was gunna chop the metal out of these to cover the wholes?

is this thick enough metal?

also, do i just need to cover the wholes with new metal, or cut out the old and make a template and weld that in?

i only want it to pass as im gunna flog her anyway. not bothered about it looking good.

many thanks

ps, first time welding..... wish me luck
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Old Mar 2, 2006 | 09:51 PM
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Yes, the metal will do and yes you can just weld patches over. Wont look pretty, but will pass
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Old Mar 2, 2006 | 09:52 PM
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any other tips mate, is it really as easy as tacking the metal on, then running the gun along?

also i assume i need to acid etch primer the repair from both sides??

sorry for the stupid questions
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Old Mar 2, 2006 | 09:55 PM
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If you want a quick repair, forget primer, etc. Tack it on and weld it up, spray on underseal, simple
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Old Mar 2, 2006 | 09:57 PM
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just buy new metal, a 20g sheet 1ftsq will cost you a few £'s
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Old Mar 2, 2006 | 09:58 PM
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also, what wire do i need to get? and where do i get these materials from?
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Old Mar 2, 2006 | 10:01 PM
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Default welding

should be alright using the old body parts just make sure you clean the paint, rust and shite off where you going to be welding, both surfaces need to be shiney metal and clean in order to get a good weld, if it's just a bodge up i'd just plate over the hole it'll will look like a ginger step child but it will pass.
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Old Mar 2, 2006 | 10:37 PM
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is it really as easy as tacking the metal on, then running the gun along?

although mig welding is easy m8,its not THAT easy
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Old Mar 2, 2006 | 10:40 PM
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I use 0.8mm wire, and I would butt weld a piece in, then wire brush it, grind off excess weld and paint area with rust killer then zinc primer followed by stonechip and top coat, will last then. If not confident to butt weld, overlap joint about 6mm all round but seam seal it to ensure no water gets in. If never welded before though practice on you old panels to get the hang of it. I find it easier to tack piece in then make up a seam weld in short bursts, as trying to run a seam weld usually results in blowing a hole, but maybe thats cause I need more practice.
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Old Mar 2, 2006 | 10:46 PM
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Newspaper and fibreglass and bang it thru an auction...job done



Cut out the rot and clean it at least a good inch into clean metal all the way around the area (any closer and it'll be foil thin)....make sure you've got a good earth for your mig, and make sure your patch is nice and clean....tack it on to start with in a few places (use a hammer shaft to push the patch tight against the panel your repairing when tacking to give a good flush job...small patches get hot quickly and it hurts ya pinkies lol)...then weld it up. Practise your welds to start with on one of your old doors that your cutting up...try various settings on the mig to get a feel for how it flows...all are different and they usualy need getting used to. After you've welded it up, underseal it and get a pass issued

Stu.
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Old Mar 2, 2006 | 10:47 PM
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And get sum1 on firewatch!!!!!
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Old Mar 2, 2006 | 10:49 PM
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cheers for all the advice lads, got several fire extinguishers lol, so no worries theren many thanls
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