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Valve head coming out?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by ConfusedAF, Jun 9, 2023.

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  1. Jun 9, 2023 #1
    ConfusedAF

    ConfusedAF Bobtail Member

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    So have done now three rebuilds on a Detroit 60 12.7 and have never had this happen before. The new heads we keep getting its like the valve head is un-welding. Is this common? Are we doing something wrong?
     
    ConfusedAF, Jun 9, 2023
    ConfusedAF, Jun 9, 2023
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  3. Jun 9, 2023 #2
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Big Road Skateboard, Jun 9, 2023
    Big Road Skateboard, Jun 9, 2023
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    Catmando Thanks this.
  4. Jun 9, 2023 #3
    buddyd157

    buddyd157 Road Train Member

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    you got pictures? cuz what you're saying doesn't make ay sense.
     
    buddyd157, Jun 9, 2023
    buddyd157, Jun 9, 2023
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    Diesel Dave and BoxCarKidd Thank this.
  5. Jun 9, 2023 #4
    ConfusedAF

    ConfusedAF Bobtail Member

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    this was after the first replacement sorry its the only photo i have to show
     

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    ConfusedAF, Jun 9, 2023
    ConfusedAF, Jun 9, 2023
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  7. Jun 9, 2023 #5
    ConfusedAF

    ConfusedAF Bobtail Member

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    These are from this second time
     

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    ConfusedAF, Jun 9, 2023
    ConfusedAF, Jun 9, 2023
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  8. Jun 9, 2023 #6
    ConfusedAF

    ConfusedAF Bobtail Member

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    second time
     

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    ConfusedAF, Jun 9, 2023
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  9. Jun 9, 2023 #7
    buddyd157

    buddyd157 Road Train Member

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    well the valves are being snapped off the stems.

    either too much spring pressure, or very old valves you are using..???
     
    buddyd157, Jun 9, 2023
    buddyd157, Jun 9, 2023
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  10. Jun 9, 2023 #8
    ConfusedAF

    ConfusedAF Bobtail Member

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    we got the head from a machine shop the first one i believe was a reman and this second one was supposed to be new
     
    ConfusedAF, Jun 9, 2023
    ConfusedAF, Jun 9, 2023
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  11. Jun 9, 2023 #9
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Hows it running after firing up? May be out of time
     
    Big Road Skateboard, Jun 9, 2023
    Big Road Skateboard, Jun 9, 2023
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  12. Jun 9, 2023 #10
    ConfusedAF

    ConfusedAF Bobtail Member

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    it was running fine did everything by the book driver even said it was running great until they heard a pop and back it came
     
    ConfusedAF, Jun 9, 2023
    ConfusedAF, Jun 9, 2023
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