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james donohoe *
Joined: 19 Mar 2015 Posts: 11 Location: bedfordshire
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Posted: Tue Jan 14, 2020 19:33 Post subject: Electric welding |
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My 1996 Landcruiser Colorado requires some welding on the underside. I cannot find anybody who will carry out gas welding. If I am to carry out an electric weld do I have to remove the CPU unit before I carry out any electric welding.
If anybody has any experience in this type of work I would be grateful for your advice.
Cheers
JimD |
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Posted: Tue Jan 14, 2020 19:33 Post subject: Google Ads keep this community free to join! |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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Posted: Tue Jan 14, 2020 20:12 Post subject: |
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I've done loads of MIG welding on mine and some arc welding on the chassis. I've not blown an ECU yet, but I do disconnect the battery and keep the welding earth electrode close to the welding site. I'm usually more worried about something inside catching light while I'm distracted. I keep a fire extinguisher and a squeezy bottle (shows my age) full of water handy. Also worth checking for hidden wires lurking nearby.
I had some welding done by a professional once and know they didn't even disconnect the battery (the clock, the radio demo mode and the compass are giveaways as these all signal a battery disconnect) _________________ 1997 Toyota Land Cruiser Colorado 3.4VX |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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Posted: Tue Jan 14, 2020 21:22 Post subject: |
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Hopefully disconnecting the battery prevents the airbags and seatbelt tensioners going off if they pick up a stray signal too. _________________ 1997 Toyota Land Cruiser Colorado 3.4VX |
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james donohoe *
Joined: 19 Mar 2015 Posts: 11 Location: bedfordshire
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Posted: Thu Jan 16, 2020 18:23 Post subject: |
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Hello modvrs
Many thanks for you reply, I am now more confident and will try myself after I have processed some test pieces.
What baffles me is that the corrosion has accured half way down the inner sill away from both front and back wheel arches. The holes are quite small about 1.5 inches square but I am unable to see how the water gets in. Anybody with any ideas, please let me know.
Many thanks again
JD |
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modvrs ****
Joined: 03 Oct 2013 Posts: 296 Location: Southampton
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Posted: Thu Jan 16, 2020 18:46 Post subject: |
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I've got a string of patches down both inner sills. Not my best welding but all I could manage upside down with hot blobs of weld landing on me. In my case a small hole ended up needing quite a big patch as surrounding metal was wafer thin.
There are several drain holes along the sills and mine were all clear with no sign of any blockage; it's a mystery why they rot through to me. Good luck with yours.
_________________ 1997 Toyota Land Cruiser Colorado 3.4VX |
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diggerdave ****
Joined: 03 Oct 2014 Posts: 448 Location: Bubwith
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Posted: Fri Jan 17, 2020 11:04 Post subject: |
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I have previously read that the sunroof drains run down within the A-pillar and into the cills. If that's true (and I've got no reason to doubt it other than a sense of unbelief that Toyota would do such a thing) keeping the drain holes clear obviously helps, but once any rust has started on the inside its being fed with constant moisture _________________ 1997 KZJ90 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 217k hard miles |
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