question about installing sumps

82 GT · 08-04-2005, 02:57 PM

Since I'm having trouble removing my pickup/sending unit, I'm considering going with a sumped tank.
How do you clean the tank out good enough to convince the welding shop that it's ok to weld?
If I took it to a radiator shop, would they be able to clean it well enough to weld?

Jeff Chambers · 08-05-2005, 06:47 AM

Rinse it out well with water, then take it to a welding shop. Any good welding shop will know enough to drop some dry ice into the tank while welding. The dry ice displaces all the oxygen so there's no combustible atmosphere. Only cost me $45 to have my sump welded in, including the cost of the dry ice. Also, don't let anyone talk you in to brazing it on....braze just won't hold well enough.

86GT · 08-15-2005, 10:07 AM

Jeff is right on this one! I looked into it myself, turns out my tank was shot. So I just got a new one for the $150 cdn it costed and had a friend of mine TIG weld it on. Not too hard of a job really. Haven't had any trouble with it, and that's two years now.

08-04-2005, 02:57 PM	#1
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	question about installing sumps Since I'm having trouble removing my pickup/sending unit, I'm considering going with a sumped tank. How do you clean the tank out good enough to convince the welding shop that it's ok to weld? If I took it to a radiator shop, would they be able to clean it well enough to weld? __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

08-05-2005, 06:47 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: question about installing sumps Rinse it out well with water, then take it to a welding shop. Any good welding shop will know enough to drop some dry ice into the tank while welding. The dry ice displaces all the oxygen so there's no combustible atmosphere. Only cost me $45 to have my sump welded in, including the cost of the dry ice. Also, don't let anyone talk you in to brazing it on....braze just won't hold well enough. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

08-15-2005, 10:07 AM	#3
86GT Sniffed too much n20 Join Date: Oct 1998 Location: Ont, Canada Posts: 1,018	Re: question about installing sumps Jeff is right on this one! I looked into it myself, turns out my tank was shot. So I just got a new one for the $150 cdn it costed and had a friend of mine TIG weld it on. Not too hard of a job really. Haven't had any trouble with it, and that's two years now. __________________ 2002 Windsor Weekend Q16 Qualifier

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