Welding partial bottom piece at the rear |
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Welding partial bottom piece at the rear |
Leon.paradise |
May 16 2021, 04:10 PM
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#1
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Newbie Group: Members Posts: 10 Joined: 30-December 19 From: Munich Member No.: 23,780 Region Association: None |
Hello,
I would like to replace and weld in part of the floor panel at the rear of my 914. I have a question to which I have not found an answer on the Internet. When I weld in the floor pan I have to completely remove the 2 plastic fuel lines (flow and return) from the tunnel or I can leave them in when welding the floor pan. I am specifically concerned with the risk of fire. The heat when welding sheet metal can cause the fuel lines to melt or the heat to make the lines so hot that what can happen. The engine and tank are still installed in the vehicle as normal. What about the engine and tank, can they be built in or do they have to be removed before I start welding. The carpet, seats, seat back wall will of course be removed by me beforehand. Pictures of the area Greetings Leon |
rjames |
May 16 2021, 04:46 PM
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#2
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I'm made of metal Group: Members Posts: 3,876 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
My $.02: Since you're in there just replace them with the stainless steel lines. Otherwise, just wrap them really good in damp cloths.
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ndfrigi |
May 16 2021, 05:29 PM
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#3
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Advanced Member Group: Members Posts: 2,925 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California |
yes please just replace the original fuel lines to Stainless steel. Not expensive and not hard to install them after you fix your floor.
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IronHillRestorations |
May 17 2021, 06:46 AM
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#4
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I. I. R. C. Group: Members Posts: 6,707 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
Anything you can possibly burn, melt, or char should be removed
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Mark Henry |
May 17 2021, 06:55 AM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Anything you can possibly burn, melt, or char should be removed (IMG:style_emoticons/default/agree.gif) I would go as far as removing (backing out) that section of the wire harness, burning that would be a costly mistake. |
VaccaRabite |
May 17 2021, 08:49 AM
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#6
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En Garde! Group: Admin Posts: 13,407 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Anything you can possibly burn, melt, or char should be removed (IMG:style_emoticons/default/agree.gif) Or cut. As I learned on my 2002 when I sliced the wire harness in twain with a cutting wheel on my angle grinder while removing rusty metal prior to welding in new floor panels. Only took a blink of an eye to really ruin my day. Zach |
Leon.paradise |
May 17 2021, 02:01 PM
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#7
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Newbie Group: Members Posts: 10 Joined: 30-December 19 From: Munich Member No.: 23,780 Region Association: None |
Hello,
What does it look like if I want to weld with a cored wire welder, there is less heat and can this process be used to weld the sheets? Kind regards Leon |
Superhawk996 |
May 17 2021, 04:01 PM
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#8
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914 Guru Group: Members Posts: 5,673 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
What does it look like if I want to weld with a cored wire welder, there is less heat and can this process be used to weld the sheets? Flux core MIG would be my absoute last resort. If your welder will support it, you want to use a shielding gas. If welder won't support anyting other than flux core, I'd seriously consider selling the machine you have a get a MIG that will support shielding gas. Flux core disadvantages: Mess. More spatter, more weld build up, harder to metal finish. Heat -- MIG is a good process but flux core is notoriously hard to control on automotive sheet metal. Flux core tends to weld hotter than gas. Be prepared to back the panels with copper to avoid easy burn though. There are some really affortable, basic MIG units that support gas. Folks on this site have done some really amazing work with very basic machines. NOTE: Be super careful not to cut the control cable tubes that are inside the tunnel. There are areas where the tubes are only 2-3 mm away from the floor pan. I'd pull the engine. The rear edge of the floor pan to rear bulkhead is edge welded to seal out water. You're going to have a hard time doing that seam and the puddle welds along it with an engine in your way. |
ddire333 |
May 17 2021, 11:00 PM
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#9
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Member Group: Members Posts: 91 Joined: 2-November 20 From: ireland Member No.: 24,835 Region Association: Europe |
I'm using flux core on my 914 restore currently, mainly as i'm working outside where the wind would cause problems for gas. Agreed gas is better, cooler cleaner but flux core is do-able.
what i find works is, 0.8 mm wire, a welder than has ability to to set amps low (15-25 amps), good stich welding technic and of course your friend the grinder to correct where its not gone right. Also for flux core the body is clamped to the negative terminal, positive to the gun - this reduces heat & splatter. |
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