Discovery 2017

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  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    Engine Bay Smoke

    My engine bay has recently started smoking. Took a video of it today.

    Now, couple of things to note.

    1. I know nothing about cars.
    2. Ive sprayed ALOT of WD40 into the hood hinges (which did douse the Engine Cover)
    3. It seems to have also pooled at the bottom end.

    Hopefully this link works.
    Any help much appreciated

    https://youtube.com/shorts/n8W3f-kwAKM?si=NtbzoO4bAX3pgwkI
    1st Sep 2026 5:00 pm
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    Photos



    1st Sep 2026 5:02 pm
  • Mole HD
    Member Since: 19 Nov 2024
    Location: Orkney Islands
    Posts: 902
    Scotland 
    2017 Discovery Td6 HSE Fuji White

    From what I saw on the video, it doesn't look like surface WD40 causing the smoke, it looks more like there's something spraying or leaking onto the engine when you rev it. From checking the pooling on the bottom end, is it diesel or oil? I can't tell from the photos.
    2nd Sep 2026 1:29 am
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    I will attempt to remove this sleeve tonight. I’m thinking it could be diesel.


    2nd Sep 2026 7:26 am
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    I had thought it was me over spraying WD40, but reading online, Diesel and WD40 have similar smells when burning. So i'm now thinking this is a diesel leak.
    2nd Sep 2026 12:39 pm
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    This Bracket looks like it’s peened, so will be a tough one to get off and a 1 time fit I guess.

    2nd Sep 2026 5:46 pm
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    This is the wet area. Anybody know if this is fuel or oil in and around here.


    2nd Sep 2026 7:44 pm
  • BAZ8046
    Member Since: 23 Apr 2026
    Location: Kent
    Posts: 49
    United Kingdom 
    2022 Discovery Td6 S Carpathian Grey

    The pipe on top is the EGR pipe that feeds in to the intake housing.
    If it's diesel the most likely source would be a leak off pipe on the injectors.
    Try and have a look at the injectors and see if one is obviously wet.
    3rd Sep 2026 8:49 am
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    Sorry for not knowing a thing about cars.
    Is this an injector? As this casing seems wet.


    3rd Sep 2026 9:42 am
  • BAZ8046
    Member Since: 23 Apr 2026
    Location: Kent
    Posts: 49
    United Kingdom 
    2022 Discovery Td6 S Carpathian Grey

    No, the injectors are under the foam cover in the middle of the rocker cover / inlet manifold.
    You can't remove the foam easily but can lift it to see what is going on.
    Is it definitely diesel?
    3rd Sep 2026 10:48 am
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    Yeah defo diesel.
    3rd Sep 2026 11:57 am
  • BAZ8046
    Member Since: 23 Apr 2026
    Location: Kent
    Posts: 49
    United Kingdom 
    2022 Discovery Td6 S Carpathian Grey

    See if you can see the leak off lines from the injectors as this will be the most likely source.
    They will be under the foam cover which is blue on the attached screen shot.
    The second screen shot then shows the leak off pipes themselves.
    It might take a bit of dismantling as I can't remember what is in the way.




    3rd Sep 2026 12:55 pm
  • Lynchyy
    Member Since: 11 Jan 2026
    Location: UK - Newcastle
    Posts: 78
    United Kingdom 
    2020 Discovery SDV6 First Edition Loire Blue

    Thanks for the help Baz. Amazing that. Stripped down. Pin hole in fuel injection pipe.
    3rd Sep 2026 6:50 pm
  • BAZ8046
    Member Since: 23 Apr 2026
    Location: Kent
    Posts: 49
    United Kingdom 
    2022 Discovery Td6 S Carpathian Grey

    No problem, glad you found the leak, they are not always easy to track down.
    3rd Sep 2026 7:32 pm
  • Mole HD
    Member Since: 19 Nov 2024
    Location: Orkney Islands
    Posts: 902
    Scotland 
    2017 Discovery Td6 HSE Fuji White

    Nice job in tracking it down Lynchyy...and for posting the results up. Folk tend to forget that it all helps if someone else has the same issue. Thumbs Up

    Baz, awesome detective work from a couple of screenshots. Bow down
    4th Sep 2026 3:46 pm
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