Found rust inside TJ frame, should I be worried? - JeepForum.com
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  • 2 Post By Freeagent27
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post #1 of 9 Old 08-14-2017, 08:28 PM Thread Starter
JHenley01
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Found rust inside TJ frame, should I be worried?

I was poking around my '99 TJ the other day and decided to stick my finger in the frame to check for rust, a decision I kind of regret now. I felt some bubbling so I decided to pick up one of those retriever magnets and start running it inside the frame. The image below is what I dug out of both sides around the transfer case skid plate, about 1/2 of a Solo cup full weighing about 10oz. This Jeep has been kept in the south all its life and has little to no rust anywhere else so I was surprised to find this much. After doing some investigating online it looks like this is a common issue due to lack of proper drainage holes from the factory.

I'm still pulling out small pieces occasionally but for the most part I'm just getting dust now when I probe with the magnet. The outside of the frame looks great, almost no rust at all. Sounds pretty solid when I smack it with a hammer, skid plate still seems to be bolted in solid as well. I've drilled some drain holes near the lower control arms and sprayed it out as best I can with a pressure washer. Should I just coat it real good with the Eastwood stuff and move on or do I have a bigger problem on my hands?




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post #2 of 9 Old 08-14-2017, 09:34 PM
Freeagent27
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Yes...flush it, brush it out, and vacuum it out the best you can. Pick yourself up a couple cans of Eastwoods internal frame coating and go to town with it. The stuff is very thin and will run all over if you aren't careful. Park on top of a big tarp so it won't stain your driveway. I would also recommend buying 4 cans if you want to coat it twice. I taped up most of my side holes in the frame to prevent it from spraying out through them too.. Hit the insides of your torque boxes while your at it too 👍
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post #3 of 9 Old 08-14-2017, 10:16 PM
Shark_13
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If that's all you got out of it, no problem. Do as above, clean it well, compressed air & a shop vac. Make sure it's 100% dry, then use the Eastwood internal coating as mentioned above. finish the outside with chassis black & enjoy.
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post #4 of 9 Old 08-15-2017, 12:31 AM
TheBoogieman
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If you got that much rust out where you could reach it with a magnet, there's plenty more inside. I flushed mine out with the carwash pressure hose, coated it with Eastwood's internal frame rust encapsulator, and drilled two 1/4" holes on each side of the skid plate about 8" to the outside of the skid. This allows any water to easily drip out of the frame. Only you can tell how much metal is gone and how thin the frame is where it rusted out.

http://www.eastwood.com/eastwood-int...z-aerosol.html
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post #5 of 9 Old 08-15-2017, 05:06 PM Thread Starter
JHenley01
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Thanks for the replies, the Eastwood coating is on the way so hopefully I can get it sprayed this weekend. I bought a dental mirror and rigged up a light inside the frame, it doesn't look as bad as I thought. Most of the rust is over the skid plate and there is some running up to the front lower control arm bracket. The bottom is mostly covered and it runs maybe 1/2" up the sides, other than that it looks clean. There is almost no rust at the rear lower control arm bracket where you see a lot of them rust out, I'm guessing those Jeeps were parked on inclines a lot.

I just need to find a way to break up the rust that I couldn't reach with the flexible magnet tool, it's mostly around the nutserts for the skid plate and the outer walls. I've rigged up a 90 degree adapter and hose for my pressure washer that I can run through it. If that doesn't work I'm gonna build the drill cable thing the guy did here:

wranglerforum.com/f210/how-to-remove-rust-from-inside-the-frame-of-jeep-wrangler-1219793.html

Looks like I probably caught it in time, I just feel bad for all the people driving around in TJ's that have no idea their frame is rotting from the inside out.
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post #6 of 9 Old 08-15-2017, 06:14 PM
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https://www.jeepforum.com/forum/f9/tj...ating-3466274/


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post #7 of 9 Old 08-15-2017, 06:15 PM Thread Starter
JHenley01
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post #8 of 9 Old 08-16-2017, 05:05 AM
Loukaps
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I would drill large drain holes one near each control arm mount. I went 7/8". I would go atleast 1/2" so mud and crap can easily be flushed out.
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post #9 of 9 Old 04-02-2018, 05:31 PM
NDJeepman
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I had a '97 with this issue. Unfortunately I didn't inspect close enough when I bought it. The dealer rhino-lined everything. Within 6 months the frame started to buckle. Admitted I was pulling a short trailer with a heavy motorcycle.
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