1998 kenworth w900 cracked frame rail :'(

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by irishluck09, Dec 5, 2023.

  1. irishluck09

    irishluck09 Light Load Member

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    Honestly never thought I'd see the day this happened but looked it up and found that it's actually a common problem.

    My frame rail cracked on the passenger side right next to the shackle.

    The cost of a new frame rail is pretty bad. $11,000 for new Fram rail, freight and drilling of the new frame rail.

    I aint got $11k to drop like that lol

    So, can this be repaired, welded, reinforced with a plate? Read something up about the cause of this has to do with the shackle itself. And that what most people do is change out to a k100 shackle.

    Any thought, input, anything would be greatly appreciated here.

    IMG_20231205_093207_01(1).jpg
     
    W923 Thanks this.
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    There is one of those running around here with a piece of another frame rail welded inside of it. Someone did it years ago. If it comes through I will get you some pics.
     
  4. W923

    W923 Heavy Load Member

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    Yep it’s fixable…you just need a welder and someone who knows how to use it. Really wouldn’t need to reinforce the inside but it’s definitely not a bad idea. If it showed up at my shop a grand would take care of it
     
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  5. Last Call

    Last Call Road Train Member

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    I won’t replace the rail But I would plate it and weld the crack if it’s cracked on the flange which it sure looks like it I would have my concerns about just welding it
     
  6. Iamoverit

    Iamoverit Medium Load Member

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    Totally fixable. Just double frame it there.
     
  7. Judge

    Judge Road Train Member

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    give you some ideas.
     
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  8. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Definitely fixable. No matter how good the welder is, i wouldn't allow it to be done without a glove.

    Way too much stress in that area to just weld.
     
  9. SmallPackage

    SmallPackage Road Train Member

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    Very common on the KW’s of that vintage. The spring hanger shoulda been bigger/taller and covered more space with a couple more bolts to reduce stress point like on the Petes. Make sure whoever does it puts a jack behind the crack and let the front end come back down to close the crack back up. Otherwise there will be a permanent sag and lean in that rail and that side of truck. Some back woods guys may just weld it like it sits. No good.
     
  10. irishluck09

    irishluck09 Light Load Member

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    SO after talking to my mechanic and listening to all you guys answer, I think we are just going to fix it.
    I think we're going to weld it.
    We're going to jack the frame up to reclose the crack, grind a groove were the crack is an Ill be welding the crack.
    But we're also gona double frame it from the inside of the frame with a 3-4ft section bolting it on
     
  11. irishluck09

    irishluck09 Light Load Member

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