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Need advice on crack on tub, under seat

Need advice on crack on tub, under seat
FiNorman

FiNorman

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Orlando, FL
Vehicle(s)
1985 CJ7, AMC 360, lunati cam, AX15, Affordable Fuel Injection, edelbrock performer manifold, 21 gallon fuel tank, Old Man Emu 2.5 inch lift, 1 inch body lift, tie rod flip, HMMWV H1 steering box, rear disc brake conversion, Dana 44 rear, YJ to CJ tub conversion, still working on 33 inch tires, Metallic dark blue paint.

Scrambler Project, cosmetically taking it back to the 80's- 1984 Scrambler, Laredo. 258cc, Holley Sniper EFI, 30in tires on Laredo polished wheels, Dana 44 rear, OME 2.5 YJ springs/lift, HMMWV steering box

Previously owned cj 7, 1979, Renegade, 258 and a '89 wrangler
does anyone have any thoughts on how to fix this fracture in the metal of the tube under the passenger seat? should I just weld over it to close? It seems like it would be more structurally sound if I was able to push up from the under the tub to even the depression in the fracture?
thanks in advance.
 
I'd flatten out the dent before I welded it. What caused it? Does it need to be reinforced to prevent it happening again?
 
Bowbender said:
I'd flatten out the dent before I welded it. What caused it? Does it need to be reinforced to prevent it happening again?
Click to expand...

its tough to say what caused it... the tub is a 1995 that for my 85 frame so it came that way... it doesn't look like it's where you would step, but I wonder if maybe the PO was in the Navy and maybe he had a large wife. Isn't that where the bolt goes for the seat bracket?
 
It is good practice to locate the ends of the crack and drill a small hole to effectively remove the end of the crack. straighten it out as much as you can or as much as you care to. Then weld the hole on one end to start the repair and continue welding past the hole at the other end to finish. If you choose not to drill, be sure to start before the crack with full penetration weld, then continue past the end of the crack. My personal choice would be to weld with a torch, but electric welders would be fine.

Dave
 
Dave Simonsen said:
It is good practice to locate the ends of the crack and drill a small hole to effectively remove the end of the crack. straighten it out as much as you can or as much as you care to. Then weld the hole on one end to start the repair and continue welding past the hole at the other end to finish. If you choose not to drill, be sure to start before the crack with full penetration weld, then continue past the end of the crack. My personal choice would be to weld with a torch, but electric welders would be fine.

Dave
Click to expand...

Thanks, do you think it is worth it to open the bottom of the tub so that I can push up and straighten out the depression?
 
Try putting a screw into the hole on each end of the crack and pull what you can?
 
Drill the holes as recommended, then heat it up cherry red with a torch. Hit it with some dry ice and it might straighten out. This is good to at least try if its hard to get to the bottom to correct. Easy reinforcement is bent plate under the bottom with a nut welded on to attach the seat to if you can get to it.

Good luck, just do it like the rest of the project and you should be fine!:chug:
 
It's a stress crack from the point load of the seat bracket. My drivers side had the same thing. I welded them shut. Try taking a small hydraulic bottle jack under it, pushing up against the weight of the Jeep, because I believe that hole is under the outer support and a 1" hole is the only access you'll have to it. At least on my 82 tub. Those Wrangler tubs may be totally different, but the jack may still help.
 
FiNorman said:
...but I wonder if maybe the PO was in the Navy and maybe he had a large wife...
Click to expand...

:laugh: Sorry, couldn't help myself. :chug: I'm a Marine vet, so I found that quite hilarious.

I don't need to beat a dead horse here, but like the others said -- Fix the dent and weld the crack shut after cleaning all that liner off the area. That's the only part of it that will bring the suck.
 
Scooter402 said:
:laugh: Sorry, couldn't help myself. :chug: I'm a Marine vet, so I found that quite hilarious.

I don't need to beat a dead horse here, but like the others said -- Fix the dent and weld the crack shut after cleaning all that liner off the area. That's the only part of it that will bring the suck.
Click to expand...

I have heard that it's a survival thing.... they prefer larger wives so there is less danger of loosing them when they go to sea.... or so says my buddy who was also a Marine.
BTW before I get hate mail...I love the navy, I still owe the ANGLICOs a couple of beers, with that said, go Army..... beat Navy.
 
FiNorman said:
does anyone have any thoughts on how to fix this fracture in the metal of the tube under the passenger seat? should I just weld over it to close? It seems like it would be more structurally sound if I was able to push up from the under the tub to even the depression in the fracture?
thanks in advance.
Click to expand...

:)Why disrupt your beautiful paint? If the seat bracket touches that point or whatever did take a nice piece of .125 or .188 aluminum and sandwich it between the top and bottom of the tub with some 1/4" bolts............50 years from now the crack will be the same size.

:D:D:D:D
 
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