1999 12.7L detroit repair

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by City-Boy, Dec 2, 2023.

  1. 062

    062 Road Train Member

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    Oct 20, 2013
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    If you’ve been idling a lot, then it may be fuel. Rub some of it between your fingers and give it a smell.
     
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  3. City-Boy

    City-Boy Light Load Member

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    109
    May 20, 2017
    Deep south BAMA
    0
    I'll try doing a halo test in a bit didn't think about that. I don't idle aside from warming the truck up in the morning and maybe a little when I'm warming food but it doesn't idle for hours and through the night
     
    Rideandrepair Thanks this.
  4. Smellfunny

    Smellfunny Road Train Member

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    Jan 28, 2012
    South Carolina
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    The only way to test it is to pull the turbo off. If no oil in exhaust manifold then it is the turbo. If oil in manifold then there is an issue with the head. You can pull the manifold off and see which hole has oil in it.
     
    Rideandrepair and City-Boy Thank this.
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