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Frame rotted through.. how do I fix

Discussion in '3rd Gen 4Runners (1996-2002)' started by Rustbox, Aug 31, 2021.

  1. Aug 31, 2021 at 7:33 PM
    #1
    Rustbox

    Rustbox [OP] New Member

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    99E5431A-1BC7-4175-AD27-91E81AD4B838.jpg Recently bought this 2000 Toyota 4Runner sr5 4x4 , unfortunately didn’t notice the insane rot and rust that’s going on inside the frame. I can stick my fingers in the holes in the sides of the frame and feel tons of little metal flakes big as a potato chip but thick as a quarter, which are just pieces of my frame rotting off and landing in the bottom. In the pics you can see where it’s rotted through right in front of the transmission crossmember.. yeah .. and a little bit on the drivers side as well , I bought safe-T-caps and Eastwood internal frame spray which is suppose to work on rust , but how do I get all of those other little chunks out without having to gut the frame entirely? And hell no I’m not doing a frame swap in my driveway. Thanks for any responses guys !! I like this thing I wanna see if I can save it

    41E5ADFC-89EB-4F37-B946-48BD16B61E33.jpg
    0265564C-C80F-473F-9C5B-FBA6E36338BA.jpg
    50D435FE-F797-4906-84B5-1BE237D6C05C.jpg
    279F6E86-358B-44E8-907A-097761BD5894.jpg
    D76CBCEE-32CD-4580-B753-EDCC43F17514.jpg
     
  2. Aug 31, 2021 at 7:52 PM
    #2
    SlvrSlug

    SlvrSlug New Member

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    Welcome to the forum.
     
    Rustbox [OP] likes this.
  3. Sep 1, 2021 at 2:44 AM
    #3
    Toy4X4

    Toy4X4 New Member

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    Welcome from Wisconsin! Rust, the enemy.
     
  4. Sep 3, 2021 at 1:05 PM
    #4
    mousemeat

    mousemeat New Member

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    welcome to the forum....r-r-r-rust ,not!
     
  5. Sep 4, 2021 at 12:42 PM
    #5
    negusm

    negusm New Member

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    I'm sorry. But from those pictures she is too far gone for rust inhibitors/protectors. Every place you see a problem, there are 3 more hiding. She needs to go to a welding shop and get sections of frame replaced. I see at least one weld about to give out too.
     
  6. Sep 4, 2021 at 12:48 PM
    #6
    4Runner170V

    4Runner170V New Member

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    I agree with above. Rust through is just too late for any treatment. The section need to be replaced. When that replacement for all rust through section is done, please make sure to do corrosion protection treatment such as wax, undercoat. Since there will be rust all over now other than replacement section, you must treat with corrosion protection wax through out the outside and inside of the frame, wheel well, inside of the bumper, even inside front fender.
     
  7. Sep 4, 2021 at 4:58 PM
    #7
    Rustbox

    Rustbox [OP] New Member

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    Yeah that’s the plan , to cut out the rust w an angle grinder and use those safe-T-caps which are cnc cut and welded metal pieces that fit over your frame you weld them in place. The internal rust prevention is for the rest of the frame that isn’t rusted through yet but has surface rust. But idk about that transmission crossmember that most likely needs to be redone entirely. Might go w that Trailgear crossmember since I wanna do links front and rear. I’m just trying to get your guys opinions and possibly any advice you guys got, thank you!
     
  8. Sep 5, 2021 at 12:05 AM
    #8
    negusm

    negusm New Member

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    Yeah, you needed to explain a bit further like that. I didn't know what safe-T-caps were.

    What you propose sounds like a potentially adequate fix.

    For the bits and pieces inside the frame rail? Probably not much you can do. If you however use something like a fluid film inside with an applicator wand, you may gunk it up enough that it will slow down the rust. https://www.amazon.com/Fluid-Film-F...gid=pla-902599407585&ref=&adgrpid=96944448914

    You will need to inspect it every year of course and don't be alarmed if it just gets worse anyways. It's a game you will ultimately lose, but if you can slow it, you may get by for several seasons.

    My son took his rust free 2010 Mazda5 from NC to Mass for school and we had it Fluid Filmed up there. I've heard good things about that stuff. It's not a hard coating which can trap moisture. I would recommend that over anything that you paint on.

    Eastwood stuff is usually good. But if it says you need to start with clean metal..I'd probably not use it.
     
  9. Sep 7, 2021 at 8:53 AM
    #9
    mousemeat

    mousemeat New Member

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    damn, that frame/underneath is terminal. it's a goner. I wouldn't trust my life to it. vehicle is d.o.a.
     
    Stoney Ranger and Overland WT like this.
  10. Sep 7, 2021 at 6:13 PM
    #10
    Rustbox

    Rustbox [OP] New Member

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    Yeaaaah that’s what I’m thinking too.. she’s a goner. I have it listed on the marketplace at the moment I’m going to just try and get rid of it.. how much would a used frame be for one of these things from a scrapyard anyone know? I tried looking online and couldn’t find anything for this old of a truck. Plus the previous owner used a rubberized undercoating which just hides the rust so this thing is fucked top to bottom
     
  11. Mar 16, 2022 at 5:17 AM
    #11
    Overland WT

    Overland WT Grumpy Old Guy

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    Many with many more to go
    At minimum, that trans crossmember is dangerously toast. I'd fine the guy who sold it and punch him in the throat for not disclosing it AND I'd really re-educate myself on buying used vehicles and what to look for. You got F'd on this.
     
  12. Mar 16, 2022 at 9:38 AM
    #12
    LandCruiser

    LandCruiser I have Toyotas

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    That is a literal death trap. Short of replacing the entire frame, it’s a loss.
     
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  13. Mar 16, 2022 at 12:15 PM
    #13
    SlvrSlug

    SlvrSlug New Member

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    I don’t know if this helps but here it is.

    D1D1634D-2C83-49B4-8F2E-50B1D77D81FD.jpg
     
    wdsteven likes this.
  14. Mar 17, 2022 at 11:52 AM
    #14
    PhantomTweak

    PhantomTweak New Member

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    None. Bone Stock. EXCEPT: Brushguard, tow hitch, both welded to the frame. It's good to have friends and a fully equipped garage!
    Just curious, if I may ask, what the two prices indicate?

    Obviously, given a choice, I'd go with the lower one, but what do the higher ones indicate? I don't need them at all. No rust on any of my vehicles' frames, I'm just curious.

    Thanks!
    Pat☺
     
  15. Mar 17, 2022 at 11:55 AM
    #15
    iamincrediboy

    iamincrediboy New Member

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    The part numbers seem to dictate R and L for passenger and driver I'd assume. So i bet they sell each side individually or both together for that section of frame.
     
  16. Mar 17, 2022 at 12:57 PM
    #16
    mac1usa

    mac1usa New Member

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    I remember the car nut care guy mentioning a whole frame on 5th Gen was around $7k no idea what the labor would be
     
  17. Mar 19, 2022 at 9:56 AM
    #17
    Ahdofu

    Ahdofu New Member

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    I am sorry for the bad luck but that frame is too far gone in my opinion. If the rust through spots are this obvious, there must be a lot of areas that are rusted but are not so visible.
     
  18. Jun 5, 2022 at 7:25 AM
    #18
    Jayjaymart

    Jayjaymart New Member

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    2010 I purchased February 2021 in SC. Vehicle was from NY. there were various areas around the frame that had rust, I had it "completely undercoated with fluid film. Yesterday I was trimming my rear bumper and came across this! The second two photos are the opposite side (left side of hatch). What are my options here and how concern should I be? I have a local 4x4 shop that welds. This is my daily and I use it for loading it up with camping gear. No off-roading or trailing. Any help is very much appreciated! Pretty bummed out about this.


    IMG_1932 2.HEIC.jpg IMG_1931 2.HEIC.jpg IMG_1934 2.HEIC.jpg IMG_1933 2.HEIC.jpg
     

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