D13 volvo fuel leak

Discussion in 'Volvo Forum' started by Metalicious, Feb 24, 2023.

  1. Metalicious

    Metalicious Road Train Member

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    Three of the last 4 times I've started and drove my truck I noticed the smell of diesel burning and smoke coming into cab through vents. Two times I remember I didn't let the engine warm really much, just started let it build air and went on my way.

    When the smoke has come through the vents into cab I also had smoke kind of bellowing under hood. But when I raise the hood I cannot for the life of me see where the fuel is coming from. Then it just stops.

    My theory is there must be a bad seal somewhere that after it gets pretty warmed up must seal properly but until then it just leaks just enough fuel on warming up parts to make you worry it's going to catch fire.

    Any ideas?
     
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  3. LoneRanger

    LoneRanger Road Train Member

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    Well only way is to check when you first start it up when it’s cold according to your observation. First place I would look if that’s the case.
     
  4. Metalicious

    Metalicious Road Train Member

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    It may be coming from somewhere at the rear of valve cover by firewall. I had a shop replace rear motor mounts and steer axle shocks they said they sprayed a little diesel to losen some bolts thought maybe I burned it off. Either way can't see anywhere its wet with diesel.
     
  5. blairandgretchen

    blairandgretchen Road Train Member

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    Put a socket on the exhaust manifold bolts and check they're tight - then look for exhaust leak/cracks in manifold or exhaust pipe. Soot or black streaks would be a tell tale.
     
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  6. Metalicious

    Metalicious Road Train Member

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    Thank you, I will try this. I know they were loose before. They'd been tightened by a shop since but might have come loose again.
     
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  7. loudtom

    loudtom Road Train Member

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    On my truck, I think one of the metal pipes that routes around the rear of the head is a fuel line for the 7th injector. I don't know if all Volvos are done this way, though. Another thing I would think is that the diesel would need high temperature in order to start smoking, like an exhaust manifold or pipe, not just engine temperatures. If that's the case, your leak is likely on the passenger side of the motor, or from the back and running down that way.

    If you can remove the doghouse, you should be able to see if you're having issues from there. At the very least, you should be able to clean up around that area.
     
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  8. Metalicious

    Metalicious Road Train Member

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    I was thinking the same thing, leak somewhere on passenger side. I did notice once that when it did it, the underside of the. I think it's exhaust bellows pipe right behind the header or s pipe off the back of the turbo looked a little wet. I checked it yesterday after getting my oil changed and it wasn't wet. So I think it may be somewhere on passenger side and hitting that pipe. Just weird how it'll smoke a couple minutes and then just stop.
     
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  9. loudtom

    loudtom Road Train Member

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  10. Metalicious

    Metalicious Road Train Member

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    You know I got to looking at my flex pipe and stuff and realized it's sitting on the frame rail. It wasn't before. And I just had my motor mounts at the rear replaced and starting to wonder if they tweaked something when they did it and created an exhaust leak. Never had this issue until after that. But I'll also check that 7th injector.
     
  11. Siinman

    Siinman Road Train Member

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    My 2014 had a bad flex pipe and it caused similar issues to what you are describing. Might make sure nothing is messed up on it.
     
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