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N14 Fuel leak

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Rideandrepair, Oct 18, 2018.

  1. Oct 18, 2018 #1
    Rideandrepair

    Rideandrepair Road Train Member

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    1998 T 600 Cummins N14 leaking fuel from what looks like the head gasket in the middle of head on right side just above exhaust manifold steady drip seems like low pressure. Ang help or ideas appreciated
     
    Rideandrepair, Oct 18, 2018
    Rideandrepair, Oct 18, 2018
    #1
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  3. Oct 18, 2018 #2
    Heavyd

    Heavyd Road Train Member

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    Probably fuel line jumper in between the heads. No fuel runs through the head gasket. Orings degrade and sometimes the jumper itself cracks.
     
    Heavyd, Oct 18, 2018
    Heavyd, Oct 18, 2018
    #2
    Oldironfan, Rideandrepair and Diesel Dave Thank this.
  4. Oct 18, 2018 #3
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    That happened to me but on a BC 1. I just changed the o-ring and solved the issue. Of course, this was back in the day.
     
    Diesel Dave, Oct 18, 2018
    Diesel Dave, Oct 18, 2018
    #3
    Oldironfan and Rideandrepair Thank this.
  5. Oct 18, 2018 #4
    Rideandrepair

    Rideandrepair Road Train Member

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    Thanks that’s what we were told is common
     
    Rideandrepair, Oct 18, 2018
    Rideandrepair, Oct 18, 2018
    #4
    Oldironfan Thanks this.
  7. Oct 18, 2018 #5
    Rideandrepair

    Rideandrepair Road Train Member

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    Just curious does head need to come off ? Looks like it does to me. The Driver is headed home now I’m just wondering what he’s up against Thanks for help
     
    Rideandrepair, Oct 18, 2018
    Rideandrepair, Oct 18, 2018
    #5
  8. Oct 18, 2018 #6
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    On my BC 1, I didn’t have to remove the head. I recommend cleaning it well before removing the crossover tube. I just removed the screw that holds them in place and pull it up with some thin long needle nose pliers. And use a magnetic driver to put the screw back in. It can be tricky, cuz there hardly any room to stick your hand in between the heads.
     
    Diesel Dave, Oct 18, 2018
    Diesel Dave, Oct 18, 2018
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  9. Oct 18, 2018 #7
    062

    062 Road Train Member

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    I’d make sure the hold down screw it tight first.
     
    062, Oct 18, 2018
    062, Oct 18, 2018
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    Rideandrepair, Oldironfan, Diesel Dave and 1 other person Thank this.
  10. Oct 18, 2018 #8
    Dino soar

    Dino soar Road Train Member

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    As as the others have said no need to remove the head. Remove the covers and the jake brake housing if so equipped.

    I would stuff rags all around it after cleaning just to make sure the screws don't fall in anywhere.

    If it were me I would replace all of the jumpers and O-rings while you are at it. Then you just replace your gaskets once and you are done.

    I would also set the overhead while you're at the valves.
     
    Dino soar, Oct 18, 2018
    Dino soar, Oct 18, 2018
    #8
    Rideandrepair Thanks this.
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