Interior frame rail bent from jack

[plymouthman72]

So I finally got the floor pan out of my car and I knew this would be an issue but wanted to see if anyone had any advice on how to fix a slight bent frame rail. I thought about trying to wedge something in between and push it out but don't think that would work. It's not rusted but I definitely don't have the money for a frame rail replacement. I figured someone else has had to have an issue like this or ideas and I would be extremely grateful for any help. Here is a pic of the rail in question.

 

[Photon440]

your idea of wedging something in there - for instance a steel insert as wide as the undamaged portion - along with some heat and a hammer...not a problem. You can also use those bottom holes to your advantage. Put a solid square bar in there with a hole drilled through, and tighten up a bolt with another flat plate on the underside to suck the bar and bent metal down.

Kind of hard to see much with just the one picture though.

 

[62 Dart Convertible]

Heat, hammer, wedge, pry bar, dolly, drill and slide hammer.... pick some...

 

[clemul]

try sandwiching frame between two steel plates at least 1/4" thick that fit inside and outside frame rail walls. Then using largest forged steel c clamps (12 inch Williams or similar should work, jaws of clamp should be at least 1" in across, threaded shaft at least 3/4") that bottom leg will fit in frame over plate and outside over plate pinch frame between steel plates to flatten. Greasing threads on clamp and using tube slid over handle will give you more torque. For bottom of frame rail put threaded clamp jaw inside rail and bottom leg on outside between plates. Sometimes it is easier to start process by just pinching with c clamp over high spots with no plates over a smaller area before using plates.( you can push or pull to the side clamp or clamps to bend metal in addition to squeezing with the jaws). Using multiple clamps and alternately tightening them works well) hammer and dolly can finish off if needed.

 

[1ol74charger4me]

Lots of great advice so far. Just wanted to add that the easiest way would be to use a spreader attachment on a porta power. Harbor Freight has some cheap setups if you can't borrow one. You are probably going to need some heat to get it out anyway you do it. You could try a crowbar and a block of wood to back it up. Start at the edges and work toward the deepest part of the dent. Resist the temptation to just cram it out.