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My Detroit s60 12.7 is very loud first 50-100 miles? After that not so much?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by CellNet, Jun 28, 2020.

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  1. Jun 30, 2020 #11
    CellNet

    CellNet Light Load Member

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    Jun 19, 2011
    Chicago IL
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    yup, it is a big difference! Yes I do have a black soot.
    It feels like engine is working rough but after an hour / two calms down and works smooth!
     
    CellNet, Jun 30, 2020
    CellNet, Jun 30, 2020
    #11
    Rideandrepair Thanks this.
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  3. Jul 4, 2020 #12
    Rideandrepair

    Rideandrepair Road Train Member

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    Aug 8, 2015
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    Black soot shows exhaust leaks. My mufflers were so bad, they would rat a tat tat when it was cold, then just loud. The heat quiets things down, I guess. You’ll always hear a leak more when it’s cold. Hopefully it’s not an internal problem, like bull gear, or something else serious. Need to figure out where the noise is coming from. A stethoscope from Harbor freight, or a long screwdriver held to your ear. Be cautious doing that. Lol.
     
    Rideandrepair, Jul 4, 2020
    Rideandrepair, Jul 4, 2020
    #12
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