12.7 Detroit timing advance

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mike(Big Irish)Porter, Apr 10, 2023.

  1. Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    If you advance your timing will the engine run better (advancing with the bull gear) I found my engine was advanced 25000th when I rebuilt the engine. I knew something was up when the dealer wouldn't warranty the rebuild and wouldnt explain the benefits of having it advanced....
     
    Last edited: Apr 10, 2023
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  3. Rideandrepair

    Rideandrepair Road Train Member

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    I have no idea. I’m not a mechanic. Out of curiosity what year is your engine? Was the Dealer a Manufacturer’s Dealership?
     
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  4. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Exactly who told you it was advanced, and how was that conclusion derived?
     
  5. Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    Thanks for responding. The mechanics was installing the cam. He told me that the timing was 25000 advanced and he said that he was able to get it adjusted at the cam to 5000 (I'm out of my wheelhouse here) he also said that Detroit told him the rest of the correction had to be done by removing the front cover. (I'm assuming the bull gear) they also said the book hours was 34 hours to remove the front cover iv also been told the actual book time was 25 hours I'm being screwed (or at least I feel like it)
     
  6. Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    The engines a DAC 2 and yes frightliner
     
  7. Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    The shop Forman at a frightliner dealer western Washington and when installing the cam the checked it with a mic gadge
     
  8. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    But your truck runs fine?
     
  9. Mike(Big Irish)Porter

    Mike(Big Irish)Porter Bobtail Member

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    To be seen there almost done and on to the test drive
     
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