 Welding on some nuts... |
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| Scott S |
 Oct 22 2010, 02:57 PM
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#1
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Small Member  Group: Members Posts: 1,697 Joined: 30-April 03 From: Colorado Member No.: 633  |
Hi All –
I cut the hole in my firewall for my conversion. I am going to attach the new steel access plate using screws on the interior, and then welding in some captured nuts on the engine compartment side of the firewall. Being that each nut will just get a quick zap of a couple of spot welds, do I need to worry about what finish is on the nuts (raw vs zinc, etc)? Thanks! (IMG:style_emoticons/default/beerchug.gif) |
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| Elliot Cannon |
Oct 22 2010, 03:12 PM
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#2
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None 
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You could always rivet some nut plates instead of welding.
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| realred914 |
Oct 22 2010, 03:54 PM
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#3
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Senior Member Group: Retired Members Posts: 1,086 Joined: 1-April 10 From: california Member No.: 11,541 Region Association: None |
for your application probably no worry if plated or not with a good mig welder but you could always wire wheel or balst them clean metal too. be very care full of gas fumes in the tunnel if you weld near there.
a nice clean alternate way is to use rivnuts or Nutcerts these are trade names of a captive nut, you can even install them in blind panel (no rear acess) ionstalls kind of like a rivet. |
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| bugsy0 |
Oct 22 2010, 04:01 PM
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#4
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Member Group: Members Posts: 191 Joined: 26-July 06 Member No.: 6,508 Region Association: None |
nutcerts or similar are the way to go - no burned paint, just as good for this application I would think and less "invasive"
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| Andyrew |
Oct 22 2010, 05:47 PM
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#5
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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I'd take a quick grind to the edge's your going to weld...
Dont need much, just 1/2 a sec on each edge. |
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| McMark |
Oct 22 2010, 08:54 PM
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#6
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
(IMG:style_emoticons/default/agree.gif) remove the zinc plating before welding. It's going to burn off anyway, and the zinc will make it harder to get a good weld. Also, used flanged nuts for increased weld area.
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.nutmanufacturers.com-419-1287802498.1.jpg) |
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| majkos |
Oct 23 2010, 07:57 AM
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#7
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Senior Member Group: Members Posts: 1,370 Joined: 29-February 04 From: Mile High 914 Member No.: 1,729 Region Association: Rocky Mountains |
Oh! Good idea! (IMG:style_emoticons/default/agree.gif)
I'll do that on my hitch plate. |
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| IronHillRestorations |
Oct 23 2010, 03:02 PM
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#8
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I. I. R. C. Group: Members Posts: 6,719 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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The nut inserts work great. Weld nuts are better but more involved. The fold over tab nuts also work without as much precision.
 http://www.aircraftspruce.com/catalog/hapages/tinnerman.php Another trick is to drill a hole about four sizes smaller than the tap you want to use, and then use a tapered punch to get the hole close to the correct drill size (to bugle the hole) and then tap it for the size screw you want to use. This takes more time, and works best if you have someone back up the hole with a improvised mandrel. |
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| plymouth37 |
Oct 23 2010, 04:14 PM
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#9
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Senior Member Group: Members Posts: 1,825 Joined: 24-May 05 From: Snoqualmie, WA Member No.: 4,138 Region Association: Pacific Northwest
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If you have an air powered rivet gun (or the muscles to wrestle a hand riveter) threaded rivets would be a really clean and nice solution for this.(IMG:http://www.914world.com/bbs2/uploads_offsite/www.memfast.co.uk-4138-1287872202.1.jpg)
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| URY914 |
Oct 24 2010, 08:39 AM
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#10
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
I always put a bolt thru the nut before I weld the nut to the plate. I think it acts as a heat shrink to keep the expansion of the steel minimized.
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