Rustproofing the inside of the frame rail?

[Jfman]

Does anyone have any experience rustproofing the inside of the frame spars / rails on their Bronco?

I seen on on other forums (I think 4Runner) that some shops removed the front and rear bumpers and then snaked a nozzle into the frame rails to coat the insides of the frame.

I am wondering how feasable that is on a bronco.

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[jehines3]

There are holes in the frame and Fluid Film makes a 360 hose nozzle. I’ve done it on others, I haven’t had the Bronco on a lift yet to even do a deep dive on this. I parked mine for the winter (soft top) and switched back to daily driving the old Silverado.

 

[Vanimalious]

https://www.bronco6g.com/forum/thre...er-surface-shield-t9-diy-result-photos.58685/

Entire thread may be helpful.

 

[M4Madness]

There is some sort of rust preventive film inside the frame rails from the factory, but who knows how effective it is? I ran a wire inside the frame from front to back to wire up rear bumper lights, and had that goop all over my hands when I finally pulled the wire out the rear of the frame.

 

[Jfman]

I got my Bronco last week and first thing I did was to pull the bumpers and rust proof the frame.

I can confirm that the rust proofing that Ford puts in the frame is only on the middle part of the frame. The ends and the rear cross sections aren’t rust proofed from the factory.

first 2 photos are before the rust proofing

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