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4.8 LS camshaft removal

Discussion in '1992-Present Chevy & GMC models' started by hd44blazer, Oct 26, 2016.

  1. hd44blazer

    hd44blazer 1/2 ton status Premium Member

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    Figured it out it was a seized camshaft bearing

    Anybody have any trouble doing this? I get about 4 lobes out no problem then it hangs up something fierce, rockers are off, pushrods out, I have 5/16" wood dowels holding the lifters up, and the cam rotates freely.

    I'm going to try 5/16" aluminum rods to see if maybe the wood is too soft and letting a lifter down just enough to catch a lobe.

    I'm worried because I read some threads that the second to last cam bearing can be seized to the cam and pull out of the block then get hung up on the next bore, I'm hoping this isn't that case. If the aluminum rods don't work I'm going to pull the rear cover and try to pull it from the rear.
     
    Last edited: Oct 27, 2016
  2. rob h

    rob h 1/2 ton status Premium Member

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    Hopefully you got it out by now, what was the result..? I was going to do mine this way but it needed intake gaskets anyway so it was all torn down, cleaned up with new head gaskets etc.

    edit.........i don't know how i missed the seized bearing caption at the top. I don't think i have seen that in the few we did.
     
  3. Babaganoosh

    Babaganoosh 1 ton status Premium Member GMOTM Winner

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    When I blew my engine the cam bearings melted to the cam I sprayed some penetrating oil on it and let the soak. Once it soaked in good a good tug freed them.
     
  4. hd44blazer

    hd44blazer 1/2 ton status Premium Member

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    I think I'll give that a try and maybe a little heat as well to help break it free, thanks.
     
  5. Babaganoosh

    Babaganoosh 1 ton status Premium Member GMOTM Winner

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    I think a light tap with a hammer and screw driver was all I needed.
     
  6. hd44blazer

    hd44blazer 1/2 ton status Premium Member

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    Came right out with some PB blaster and like you said a light tap, then worked it over the other journals. Thanks for the advice.
     
    skunked likes this.
  7. Babaganoosh

    Babaganoosh 1 ton status Premium Member GMOTM Winner

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    No problem anytime.
     

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