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ISX12 Oil Leakage

Discussion in 'Peterbilt Forum' started by eng.moh.4u, Mar 19, 2022.

  1. Mar 19, 2022 #1
    eng.moh.4u

    eng.moh.4u Bobtail Member

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    Jan 13, 2017
    0
    I have 2014 Peterbilt truck with Cummins ISX12
    I got engine oil leakage through exhaust manifold
    Turbo checked found ok then removed exhaust manifold found oil leaks from all pistons through the valves as below pics. I think this because valve stems

    Do I need to remove the cylinder head for repairing or valve stems can be replaced without removing cylinder head?
    [​IMG]
    [​IMG]
    [​IMG]
     
    eng.moh.4u, Mar 19, 2022
    eng.moh.4u, Mar 19, 2022
    #1
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  3. Mar 21, 2022 #2
    baha

    baha Road Train Member

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    Jul 25, 2013
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    Yes the head must go to a very good machine shop after the head is off all of the valve guides will need to be replaced and the valve seats cut and injector seats will need to be replaced, after head is checked out for cracks?
     
    baha, Mar 21, 2022
    baha, Mar 21, 2022
    #2
  4. Mar 21, 2022 #3
    pushbroom

    pushbroom Road Train Member

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    Valve stem seals are replaceable with the head still installed. Did alot of ISX15 ones, even made tooling to avoid pulling injectors.
     
    pushbroom, Mar 21, 2022
    pushbroom, Mar 21, 2022
    #3
    spsauerland and QUALITYTRUCK Thank this.
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