sube body builder question

[boxer3main]

I inadvertantly asked this at my favorite ecomod forum. Most folks there take things away, I add 80 pounds of steel.

anyhoo..

I welded the hell out of 87 subaru gl. it creaked in 4lo, it has full diff lock there. It drove me to go a bit beyoind normal, by 140 hours of labor and fabbing, and panels doubled.It needed rust repair anyway, and I simply went way way beyond. front to back, inside channels reskinned outside of channels, doubled tripled, steel rods, and all hidden. It is indeed quiet now.

something started happening with fuel. the pump got stronger of course, less body vibration, but this question is concerning the gas tank. Twice I have caught strange events without definition:

• full tank was leakiing from somehwre up top..the starnge part of this? there is no hole in the tank, and gasket up top is good. Physics event #1
  
• the rear of gas tank was smoking to a drill bit, I thought nothing of it...until realizing it was trying to catch itself on fire...I even had water spraying on it , it did not want to stop.
  

I am curious as to what tubed race subes encounter when body is extremely hard. Is there a remedy for making the tank mounted softer? it is hard bolted to the chassis if anyone hasn't noticed. Signals of integrity exceeded, it is indeed a chance for danger. Any ideas?

I am simply going to line it with silicone when tank is swapped this spring, but maybe a strap idea or something..As the body self sustains without tank as part of it. I welded that far.

I cannot think of another vehicle to relate this too, but am certain there are many others...anybody fix this? open to ideas.

 

[Ty Ty]

Caged cars have fuel cells, but having slightly more vibration shouldn't bother the stock tank, unless it was bad already. Stock mounting should be fine.

1. If your tank is leaking...it has a hole. Or, one of the seams has popped a little. Or, a fitting is leaking.

2. What?

 

[IBratmanI]

Yeah it's almost definitely the seam. All the old Subarus do that because they get rusty. You can't just cover up the rust and expect it to stop rusting.