Have you ever welded or bonded a sump to fuel tank?
Moderator: Team
-
- Expert
- Posts: 776
- Joined: Mon Nov 26, 2007 11:44 pm
- Location:
Have you ever welded or bonded a sump to fuel tank?
Can you buy a 2 part expoxy instead of dangerously welding. I have never in stalled one but want to learn how.
- Caprimaniac
- Guru
- Posts: 1060
- Joined: Fri Nov 18, 2011 1:17 pm
- Location: NORWAY
Re: Have you ever welded or bonded a sump to fuel tank?
after flushing the tank X times w / weater & detergent, fill it With water & weld away.
How to turn GURU in an instant.....
Re: Have you ever welded or bonded a sump to fuel tank?
Yep water it down wash a few times and go for it, done it plenty of times.
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Have you ever welded or bonded a sump to fuel tank?
Solder is better at preventing rust, as you don't have to grind off the original zinc/lead coating on the tank. The sump can also be tinned inside & out before installing too. No open flame = no boom.
DON'T PANIC
-
- Guru
- Posts: 1608
- Joined: Sat Dec 24, 2011 10:02 am
- Location: melfort saskatchewan Canada
Re: Have you ever welded or bonded a sump to fuel tank?
I've welded on lots of sumps and had one close call. When flushing the tank its possible that an air pocket can hold gas fumes up high. Now i take them to a local shop that uses come chemical steam cleaning process to flush the tank before i do any cutting / welding.
A kid was killed nearby a few years ago cutting into a barrel that exploded.
Brian
A kid was killed nearby a few years ago cutting into a barrel that exploded.
Brian
The Word of God is quick and powerfull
www.therocketshop.blogspot.com
www.therocketshop.blogspot.com
-
- HotPass
- Posts: 596
- Joined: Sun Jul 30, 2017 2:24 pm
- Location: Summer Shade, Ky
Re: Have you ever welded or bonded a sump to fuel tank?
I used compressed nitrogen to purge the tank after cleaning . The nitrogen displaces the oxygen in the tank creating a non flamable enviroment . Used the purge when I cut the first side off with a angle grinder and cut off wheel . I narrowed the tank 4"s each side to fit the moved in leaf springs and added a sump .
Re: Have you ever welded or bonded a sump to fuel tank?
I had a shop weld or braze my sump to a stock 1969 mustang fuel tank and it worked out great.
-
- Expert
- Posts: 776
- Joined: Mon Nov 26, 2007 11:44 pm
- Location:
Re: Have you ever welded or bonded a sump to fuel tank?
I am going to take the tank out and flush it good with Dawn and water. Then set it up right sand were I will weld try 030 wire. Start at top and pull puddle down with light taps on weld. This will be my 1st so I will take my time. Anyone got pictures of how its down?
-
- Expert
- Posts: 776
- Joined: Mon Nov 26, 2007 11:44 pm
- Location:
Re: Have you ever welded or bonded a sump to fuel tank?
Probably tig would be the thing. I narrowed a tank 40 yrs. ago welded it with oxy acetylene.
Jim
-
- Guru
- Posts: 8707
- Joined: Sun Jan 21, 2007 1:16 pm
- Location: Victoria BC Canada
Re: Have you ever welded or bonded a sump to fuel tank?
Back in the day we used to use a brushless motor vacuum after draining and flushing any raw fuel from the tank.
Now this can't be done with any vacuum only a brushless motor as fumes will light if conditions are right not every time
but it will at some point. The use of grade C nitrogen to blow dry will help dissipate fumes as well.
We would use a wire feed or TIG welder to weld the sumps to stock type tanks but I would always have a vacuum
source applied to constantly remove fumes. the weld was always better when using a feeder system cause it would help
with penetration as long as the negative pressure was no more then 2 inch's of vacuum to just keep any fumes from
rising up to the welded area.
Now this can't be done with any vacuum only a brushless motor as fumes will light if conditions are right not every time
but it will at some point. The use of grade C nitrogen to blow dry will help dissipate fumes as well.
We would use a wire feed or TIG welder to weld the sumps to stock type tanks but I would always have a vacuum
source applied to constantly remove fumes. the weld was always better when using a feeder system cause it would help
with penetration as long as the negative pressure was no more then 2 inch's of vacuum to just keep any fumes from
rising up to the welded area.
Real Race Cars Don't Have Doors
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Have you ever welded or bonded a sump to fuel tank?
Is this for the G-body? Still using the stock tank?
When's the last time you had the tank out and had a look inside? If it been a while (or never) you might not be real happy with what it's like in there. Replacement tanks & sending units are readily available and pretty cheap (be glad you don't have an Elky or a wagon), I would just buy a new tank and solder the sump on and replace the whole mess as a unit.
When's the last time you had the tank out and had a look inside? If it been a while (or never) you might not be real happy with what it's like in there. Replacement tanks & sending units are readily available and pretty cheap (be glad you don't have an Elky or a wagon), I would just buy a new tank and solder the sump on and replace the whole mess as a unit.
DON'T PANIC
-
- Expert
- Posts: 776
- Joined: Mon Nov 26, 2007 11:44 pm
- Location:
Re: Have you ever welded or bonded a sump to fuel tank?
It is a malibu wagon 79 model. So I will buy a new tank. Has set for 12 yrs. May be just weld a fuel fitting to the lowest point.
-
- Expert
- Posts: 674
- Joined: Sun Aug 10, 2008 11:51 am
- Location:
Re: Have you ever welded or bonded a sump to fuel tank?
Well heck, wagon tanks are available. I thought they were near impossible to find a while back?
The coating on the Spectra tanks will take solder beautifully without any special flux or anything.
The coating on the Spectra tanks will take solder beautifully without any special flux or anything.
DON'T PANIC
Re: Have you ever welded or bonded a sump to fuel tank?
See if you can find a new tank that has a threaded drain plug at the lowest point. Then substitute a fitting and attach your fuel line there. If you want to keep a drain plug, use a tee fitting. Plug or petcock at bottom and attach fuel line to side outlet.
HB
HB