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Topic Review (Newest First)
04-11-2011 07:13 AM
05wrangler alright thats what i needed to know thanx very much!
04-10-2011 08:39 PM
444 When the dealership sells you that undercoating package on your new car, they don't sand anything. I would just focus on having it as clean as possible. Get on your back with a pressure washer and get it clean clean clean as you can. You will get soaked but it's worth it. I would try and clean off any rust with a wire wheel on a drill or angle grinder and prime any bare metal areas. You can hit the original paint underneath with a scotchbrite pad if you want to scuff the surface up a bit.
04-10-2011 01:21 PM
05wrangler right thanx for the info, do i need to sand? if so how much?
04-10-2011 12:50 PM
444
Quote:
Originally Posted by 05wrangler View Post
i have a 2005 TJ and i have just a little rust on the back bumber and i can get to it easly. i am wondering should i go ahead and coat the hole frame just to keep it from happening or no? what should i use if there is no rust there yet? do i have to sand it down to bare metel or just ruff it up? (i also have a 3 inch body lift i am going to be removing and i was wanting to get this done before that so i can get the top of the frame better) any advise??
Buy or borrow a pressure washer and clean the underside of your jeep as thoroughly as possible. Then buy, borrow or rent an air compressor and use a $10 harbor freight schutz gun to undercoat the whole underside of your jeep. You can buy a gallon of decent undercoating from napa for not too bad a price. If you apply it too thick it will take a long time to dry so I suggest doing it in a couple thin-medium coats. If your jeep is basically rust free underneath just focus on getting it clean and dry before you hose the stuff on.
04-10-2011 11:10 AM
05wrangler i have a 2005 TJ and i have just a little rust on the back bumber and i can get to it easly. i am wondering should i go ahead and coat the hole frame just to keep it from happening or no? what should i use if there is no rust there yet? do i have to sand it down to bare metel or just ruff it up? (i also have a 3 inch body lift i am going to be removing and i was wanting to get this done before that so i can get the top of the frame better) any advise??
06-13-2010 03:39 PM
nyvulcanman i just did mine not to long ago because my frame had rust and i agree with hannahuffster on the 1/8" plates when i put my lift in last weekend i also removed the fuel tank and weld in the plates on both driver and passanger side for added strength
06-13-2010 03:03 PM
hannahuffster I always like chiltons the best.

I would recommend to everybody to drill some small holes (like 1/4 or 3/8 - size isnt real important) at both ends (front and back) of both frame rails on the bottom side around the shackle mounts. There are holes in the frame rails for water to enter on the top and sides but no holes for the water to drain out of.

Also if you are already going to be taking the suspension off [or even better tearing down to the frame] I would wrap both ends of the frame rails in some 1/8" plate for added strength. If you are not removing the body you can still get to 3 of the 4 sides with a little work.
06-13-2010 10:25 AM
wegriffith3
Gonna Get Into It!

I too have serious rust problems, as well as two broken shock mounts that need welding. I can also see two spots on the frame that are rusted thru. So, I've decided to take the body off and do it right.

My question is, what is a good book (Chiltons, Climbers, etc) that you would recommend for the jeep that will walk me thru the process?

Thanks for any guidance.
06-30-2009 09:03 PM
YjMopower honestly if you feel theirs a lot of rust under there the best way to fix the probelm is to take the jeep apart to the bare frame to clean it, weld up patches and repaint it. I know both of you have no mechanical aptitude , but theres never a bad time to start. I took my jeep apart because of this and swapped the frame , but as you start to take things apart some things are very old and will break. just be ready to have some cash on the side.now you have to understand what your dealing with before you even take it apart, you have to anylaze the tub which is the body and the frame . if you think both are repairable and not gone then you should do it. taking your jeep apart will help you get to know your jeep. now one of the main things you should look at when grinding it down are the body or tub mounts , you want to becareful there depending where are your rot spots. be sure to have a buddy or a welder around most likey might need one.
06-30-2009 07:07 PM
Rob_Feature
Another Noob...

I can't tell you how much I'm in exactly the same position as the original poster of this thread. I found this post when searching for a way to start cleaning the massive amount of rust from the undercarriage of my black '93 YJ. I know nothing about auto repair (changing the oil will be my first big adventure...really, I'm not kidding). This Wranger was mine in High School and I just got it back after many years and now it's time to try and correct some of the abuse. Thanks for all the great advice here.

So, here's my first stupid question on the forum :
When removing the rust and repainting, is there anything I should NOT do this to on the underside? Should I stick to the frame/skidplate/etc only? I'm still not sure what all the parts actually are, so I'm afraid of scraping/painting something I shouldn't.

Any general rules or guidance as I get started on this first project? Any help is appreciated. Thanks!
06-25-2009 06:46 PM
joemd60 My 04 has frame rust.
06-03-2009 12:12 PM
beardown
..

hey i was in your exact position about 6 months ago, had bought a 93 wrangler. i agree with the other dudes, check the transmission mount cause its probably broken, i replaced mine with a poly one and made a huge dif... youll be able to tell if its broken cause your trans will be resting on the skid plate and it should have a few inch clearance. floorboards are important too. as far as the frame i did exactly what you are explaining, i got a chisl and scraped of rust then bought a wire wheel from ace and attachd to drill and scaled rusty areas of the frame, i used the 3 step por 15 for the 1st few areas, when my can ran out i realized that the marine clean wasnt really necessary as long as you use a cheaper household degreaser to clean the area you are treating. i would recommend however the metal ready, you can really see this stuff eating the heavily rusted areas. as we all know por 15 is pretty expensive, i switched to "chassis saver" which is probably the exact same thing as por 15 but 15 bucks cheaper. you MUST still pre with the metal ready though! what i did was hit the rusted areas of the frame that i could get to. i did have to support the jeep and remove the tires to get the frame behind the tires and around the gas tank which was probably the most rusted area for me. youll get the feel for it after a few of these sessions, i wouldnt worry too much about damaging stuff with the drill/wheel. just dont be stupid and grind away a fuel line or something. wear gloves the stuff is a bitch to get off
06-01-2009 08:29 PM
Johnson37 I had the same issue, I am new Jeep owner, 2 weeks now. I got a spray on product called The Must for Rust at my local paint store. I sprayed the frame pretty heavy with the bottle ( its just like a Windex bottle ) twice and then power washed it off. You will be amazed at the difference when it dries out. The product was $13 per bottle and I used 2 bottles. Its a good starting point. Good luck
06-01-2009 07:22 PM
dooder
Quote:
Originally Posted by Moojamboo View Post
If I follow the scrape, paint approach, and the rust reappears, do I just continue the process of scraping and painting? Is there going to be corrosion inside the tubes I can't access?

I don't have a grinder, but I have a drill, and bought a steel brush for removing paint/rust. Like I said, I am just getting into this, I was going to go out to the garage now, but I would like to use the brush with the drill compared to hand scraping everything. Will I damage it?

Thanks,
i think your thinking too deep. use a steel hand brush to remove loose rust. then if you want using the drill brush take those exposed areas down to clean steel and then primer and paint. you dont need to strip entire frame. im sure the inside of the frame has surface rust...if it wories you that much you need to do frame off and have it completely coated.
06-01-2009 03:23 PM
Moojamboo thanks for the help - keep it coming! Regarding the por15, is that something that is going to work in this instance where I am not going to take the entire jeep apart to apply? I just don't have the aptitude / finances / time to do that (yet) maybe in the future. Is spending the money on the por15 (all three steps?) that much better than wire brushing to paint in this instance where I am leaving the jeep together?

If I follow the scrape, paint approach, and the rust reappears, do I just continue the process of scraping and painting? Is there going to be corrosion inside the tubes I can't access?

I don't have a grinder, but I have a drill, and bought a steel brush for removing paint/rust. Like I said, I am just getting into this, I was going to go out to the garage now, but I would like to use the brush with the drill compared to hand scraping everything. Will I damage it?

Thanks,
06-01-2009 01:58 PM
scrambler1 hey welcome to the forum. Vermont winters can be rough. It is still in the 30's now at night.
If you have a small grinder with a 5/8 x 11 arbor you can get wire brush attachments that work well.
make sure the frame is worth putting time and money into. look at your body mounts,floor pans, and frame around the rear near the shackle mounts like dooder mentioned.
Take a hammer and hit the frame in areas to make sure it is solid.
you can slow it down by wire brushing the frame down and using POR 15 3 part system then topcoating with two coats of semi gloss black.
prep is the key making sure everything is clean and dry before sealing. Trying to do this outside in VT is impossible need to do inside and let it dry out before.
Small world I live in Waterbury.
here is a link to the por15 site:
POR15, Inc. - Stop Rust Permanently - Repair Gas & Fuel Tanks
06-01-2009 01:18 PM
dooder ide wire brush off all the loose rust and see what im working with. frames can be welded and reinforced. if it doesnt look too bad ide just spray some primer and then a coat of paint. sure you can take more steps to make sure it lasts longer but me personally if i find the frame is sound ide just spray and go once a year or when needed.
I would rather concentrate my efforts in making sure body mounts, engine mounts and trans mounts are good. Then ide move onto suspension. ofcourse again thats what i would do cause i looked over my jeep and know what im working with.
06-01-2009 12:43 PM
Moojamboo
Frame rust

Hi all - new jeep member - very low experience in fixing cars - learning on this 93 yj.

As I start on my journey of owning a jeep, I am noticing some frame rust and want to know what to do about it. I am hoping it is surface rust, as the jeep is a 93 and I am from Vermont, this seems reasonable. I have done much searching on the internet and this forum on what I should do - does this seam reasonable.

1. Get as much surface rust off with wire brush - can I use one I attach to my drill?

2. Use a primer / rust inhibitor. Rub with Royal Jelly? Another treatment?

3. Cover up with a good paint.

I don't know, or have access to, any welding equipment. I am new to this, but I want to get ahead of any issue I have now as I just got the jeep a month ago. I realize this may be a band aid, but what else should I be doing to prolong my frame / life of jeep? My goal is that it is off the road for the winter months, this is purely a nice weather project, so it hopefully won't be exposed to much more salt, etc.

Also, when/if it gets the point where the frame has rust holes...is that it? Will that make it non inspectable? Will that make it unsafe to drive? Is there anything that can be done, such as welding out the bad parts, putting in some new tubing that is reasonable in price? Part of me doesn't want to take the time to fix her up, take good care of her, if she has no long term viability. If I can fix rusted frame issues down the road for not a crazy amount of money, I am interested in the methods and potential cost.

Thanks for any help anyone can give - just trying to be proactive and keep what I have. I already had to sweet talk the wife to get this jeep, I can't justify another one for a bit. She wants children, I want to fix the jeep.

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