dd15 head gasket leak?

Discussion in 'Freightliner Forum' started by RMTR, May 26, 2021.

  1. RMTR

    RMTR Bobtail Member

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    Jan 17, 2020
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    hi. l hope you can see my video from link below. coolant is leaking from two places r/s engine and l/s. same after replacing head gasket and second time was replaced head and still same leak. would say even biger than before on old head. No mixing with oil no pressure in sirage tank just leak outside 20210526_093308.mp4
     
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  3. Rockinhcattle

    Rockinhcattle Bobtail Member

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    May 26, 2021
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    More than likely upper liner o ring leaking
     
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  4. Old Man

    Old Man Road Train Member

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    Liner may have dropped a little, bet they didn’t check liner protrusion, just slapped new head on.
     
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  5. Rideandrepair

    Rideandrepair Road Train Member

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    Another $2000, plus counterbores, about $300 per hole. plus Labor, maybe $2000 more. You have a whole new engine. I’d take it somewhere else, have it done right. Before the new head gets warped. Original shop should have checked the liner heights. Bad gasket first time, bad head second time. Highly unlikely. Bolts were upgraded, and torque values were increased a bit. But all previous to your engine. New bolts should always be used with new head. I’d check the mechanic knows all that.
     
  6. RMTR

    RMTR Bobtail Member

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    Jan 17, 2020
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    The height of the liners was checked and is ok, new head bolts for new head. The upper O-rings of the liners turned out to be a problem. No more leaks after liners replaced. Thank you for support.
     
  7. RMTR

    RMTR Bobtail Member

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    Jan 17, 2020
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    Yes thank you for right clue

    Would you believe that a few mechanics and two large szop bosses did not carry that it could be the top o-ring? Only after removing the liners did they believe it. I guess it's not a common issue.
     
    Last edited: Jun 16, 2021
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