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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

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  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.
     
    mrmike7189 likes this.
  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.
     
  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
     

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