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Unread 07-05-2009, 06:43 AM   #1
fangt
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Shall I weld with gas tank on?

Last night I was bored, so I went under my XJ to check all the bolts and grease the joints. I found out that upper shock mount on my rear right shock broke off the body. I decided to weld it back on, but I am a super beginner welder, I only know MIG welding and have never weld facing up. any tips and pointers?
Also, I heard that I need to remove the gas tank when I weld on my vehicle. Is it absolutely necessary? If not, what shall I do to make it safer?
Thanks.

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Unread 07-05-2009, 07:12 AM   #2
Savvy
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Have someone there with you and weld away. Just make sure you don't smell and gas fumes and have a fire extinguisher or hose ready before ou start.
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Unread 07-05-2009, 07:35 AM   #3
little_Jeep
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I tore my upper control arm bracket on the driver's side frame off. If you look at this, you will see that you fuel lines are about 1 inch away. I paid to have a guy weld it because I wasn't feeling warm & fuzzy about doing it. The guy welded it without even giving it a second thought. I say, make sure no fuel leaks, know where you wand is pointing & weld away.
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Unread 07-05-2009, 09:08 AM   #4
littleblackXj
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If you are really worried about it, throw a wet rag over the parts you don't want to catch on fire
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Unread 07-05-2009, 09:15 AM   #5
StaleAle
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Disconnect your battery before you weld anything to your jeep so you don't take a chance of frying the CPU. Also be smart. If there is the slightest chance that you could start a fire by being to close to the gas lines or tank then you should take every precaution you can before you start.
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Unread 07-05-2009, 09:16 AM   #6
GregB_00XJ
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My mechanic (and a good friend) welded in a set of upper BPE's in the rear (same spot as you) with the tank on...no second thoughts about it.

I think that as mentioned, you should have a friend there with a fire extinguisher, and you will be good to go. If you have gas leaking out of your tank, you run the risk of going BOOM every day!
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Unread 07-05-2009, 11:27 AM   #7
m2rtin
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When you weld with MIG, there is gass comming out of the pistol head, that prevents catching fire...but the temperatures are great in deed...

When you weld, you should have the alternator disconnected!

edit: the gass tank on should be ok, if it's not leaking badly

Last edited by m2rtin; 07-05-2009 at 11:29 AM.. Reason: forgot st
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Unread 07-05-2009, 12:56 PM   #8
fangt
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Just did it with gas tank on, thanks for all the advices. I got my buddy stand by with fire extinguisher. Everything went well. Only problem is that my weld sucks.. I blasted the metal all over the place, hope the weld will hold.
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Unread 07-05-2009, 04:15 PM   #9
m2rtin
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that happens, you have to keep the head of the pistol realy close to the welding, so that the CO2 can prevent oxidation of the weld, also the weldings are nicer if you lick them a bit with a grinding wheel...(I don't know the exact terms...sorry), keep practising, and a skill will sort itself out
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Unread 07-06-2009, 10:46 AM   #10
XJH-007
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You welded your shocks to the Uni-body??



.........
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Unread 07-06-2009, 11:24 AM   #11
little_Jeep
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Quote:
Originally Posted by XJH-007 View Post
You welded your shocks to the Uni-body??



.........
Naw.......... he broke the upper bolts and is just going to tack weld a couple small bolts in place to act as studs for the upper shouck mount.
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