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  • UCF Machine Shop has been family owned since 1980. Find out more about Denny Knaub and the beginnings of UCF Machine Shop here.

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    Performance Diesel Rebuilds
    Cummins® 5.9L Inline 6 12-Valve Head

    The Cummins® Diesel is one of the strongest, most bulletproof engines ever made. But like any engine, the miles will eventually take their toll. We offer 4 different packages to match your budget.

    Precision machining with exceptional detail paid to tolerances assures a tighter mechanical seal between valves and valve seat, and fuel delivery efficiencies that exceed those of today's factory engines. This results in more horsepower, more torque, and better fuel economy.

    The combination of UCF Machine Shop's skilled machinists and our use of the highest quality parts will give you a stronger, better performing diesel.

    Contact us for other available options. We offer a large array of custom options designed to enhance the performance and turn your engine into the ultimate diesel. We can provide new head castings, cores, and more.

    We also do performance valve jobs for Ford Power Stroke, and GM DuraMax diesel engines. Contact us today with your questions.

    * Package prices are subject to change but reflect a general guide of current costs. Parts and shipping rates may change so please contact us for the most up-to-date pricing + shipping costs.

    Stage 1

      STAGE 1 5.9 L 12V Performance Plus Head Rebuild
    - includes the following
     
      New valve seal set for 5.9 12V  
     
    WORK PERFORMED
     
      Clean cylinder head.  
      Perform 3 angle valve job.  
      Resurface cylinder head.  
      Pressure test cylinder head .  
      0-Ring/Fire Ring each cylinder.  
      TOTAL - INCLUDES FREE RETURN SHIPPING WITHIN THE CONTINENTAL U.S. (price does not include applicable taxes or environmental charges)

    $849.99

    Stage 2

      STAGE 2 5.9 L 12V Performance Plus Head Rebuild
    - includes the following
     
      New valve seal set for 5.9 12V .  
      New valve guide set for 5.9 12V.  
      New valve seats for 5.9 12V.  
     
    WORK PERFORMED
     
      Clean cylinder head.  
      Perform 3-angle valve job.  
      Install 12 new valve guides .  
      Install 12 new valve seats in cylinder head.  
      Resurface cylinder head.  
      Pressure test cylinder head.  
      0-Ring/Fire Ring each cylinder.  
      TOTAL (price does not include applicable taxes or environmental charges)

    $1,245.99

    Stage 3

    The Stage 3 rebuild package.

      STAGE 3 5.9 L 12V High Performance Head Rebuild
    - includes the following
     
      New valve seal set for 5.9 12V  
      New HD valve spring set for 5.9 12V (60 lbs.)  
      New valve guide set for 5.9 12V  
      New valve seats for 5.9 12V.  
     
    WORK PERFORMED
     
      Clean cylinder head.  
      Performance 5-angle valve job with radius work.  
      Install 12 new valve guides.  
      Install 12 new valve seats in cylinder head.  
      Resurface cylinder head.  
      Pressure test cylinder head .  
      0-Ring/Fire Ring each cylinder .  
      TOTAL (price does not include applicable taxes or environmental charges)

    $1,720.99

    Stage 4

    The Stage 4 is our finest rebuild package.

      STAGE 4 5.9 L 12V High Performance Head Rebuild
    - includes the following
     
      New valve seal set for 5.9 12V  
      New HD valve spring set for 5.9 12V (60 lbs.)  
      New valve guide set for 5.9 12V  
      New valve seat set for 5.9 12V  
     
    WORK PERFORMED
     
      Clean cylinder head.  
      Performance 5-angle valve job with radius work.  
      Install 12 new valve guides.  
      Install 12 new valve seats in cylinder head.  
      Resurface cylinder head.  
      Pressure test cylinder head.  
      0-Ring/Fire Ring each cylinder .  
      TOTAL (price does not include applicable taxes or environmental charges)

    $1,959.99