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Cummins ISX brass liner shims

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Truck engine machinist, Feb 8, 2014.

  1. Feb 8, 2014 #1
    Truck engine machinist

    Truck engine machinist Light Load Member

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    When you have the counterbores machined on an ISX, you will have two brass shims under the liner.
    New liners come with a shim already installed, plus the one needed to replace the metal removed when cutting the counterbores.
    Has anyone heard of Cummins brass cylinder liner shims shims failing?
     
    Truck engine machinist, Feb 8, 2014
    Truck engine machinist, Feb 8, 2014
    #1
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  3. Feb 8, 2014 #2
    Leith.l

    Leith.l Bobtail Member

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    Feb 8, 2014
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    Yes some times they leak but not very often
     
    Leith.l, Feb 8, 2014
    Leith.l, Feb 8, 2014
    #2
  4. Feb 9, 2014 #3
    Truck engine machinist

    Truck engine machinist Light Load Member

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    Dec 2, 2011
    USA
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    How do you know that they are leaking? coolant in the oil? Head gasket leaking?
    They (brass repair shims) have only been out about 2 years. The brass shims on the liners have only been out about a year.
     
    Truck engine machinist, Feb 9, 2014
    Truck engine machinist, Feb 9, 2014
    #3
  5. Feb 9, 2014 #4
    Mr. Truck Fixer

    Mr. Truck Fixer Bobtail Member

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    I have never seen the liner shim cause a problem, once the liner is seated in the block with the head torqued down the liners cannot move. Now all this providing the liner protrusion is correct on all cylinders. If your pulling liners and find broken brass shims your in for some severe machine work or replacing the block.
     
    Mr. Truck Fixer, Feb 9, 2014
    Mr. Truck Fixer, Feb 9, 2014
    #4
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