749 749 Found Leaking Oil From Front / Horizontal Head Area

Discussion in '749 / 999' started by Simon Raglione, Jan 28, 2026.

  1. I have ordered the cam cover main gasket, going to get busy with the gunk today and see if i can find anything else.
    Went to buy the genuine "rubber" (viton) washers but they are Bloody expensive for what they are.
    Might have a cheeky measure for OD/ID/Thickness and hardness and replace with industrial equivalents instead (unless there is something special about ducati's spec for them)
     
  2. Cheapest shit on the planet to outsource with the biggest profit margin to flog on. Or is that being too cynical ? :D Andy
     
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  3. No reason not to look around, they're only O-rings! Even Ducati aren't stupid (or vain) enough to use 'special' sizes if there's a commercially available one...
     
  4. Mine came as 'samples' from a fasteners supplier to work, which must mean they are available off the shelf.
     
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  5. May as well whilst the cover’s off if they’ve been leaking

    I was referring to Nasher’s post (I think), sorry for any confusion.

    As long as they’re oil proof they’ll be fine, not all ‘rubber’ is; Viton is just a brand name.
     
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  6. I can confirm that the Cam Covers on my 999 have screws to hold the Coils in place.

    But, that isn't a very helpful thing to post as they did have studs, one of which sheared off and had to be drilled out.
    At which point I put Stainless inserts in both and used stainless Cap head screws to hold the coils in.

    From memory the holes in the Cam covers were Blind, so I don't think they could leak Oil, but we all know things like that appear to change with Ducati at their will.
     
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  7. Looking at it, i think i agree and they seem to be blind. I am trying to work out the best way to scooch the radiator out the way so i can take the cam cover off, clean and spray them and reinstate with new gaskets and washers (and a dab of sealant all round)
     
  8. youre better of removing the rad and bleeding/topping up when done
     
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  9. OK, noted!
    Can i check: remove all the hoses and then 2 bolts at the top by the looks of things?
     
  10. yep just the feed and return for the rad but get them bunged up unless you want to drain down and refil the entire system - not hard just takes time to do it properly esp if you want to flush it first
     
  11. Thanks, with a drip tray, a can of gunk and an airline i have got most of the sh!te off it now but it seems a shame to carry on with it as-is when the cam cover look so skanky
     
  12. While you have the oil rad. off I'd take the opportunity to flush it through with petrol.
     
  13. he wont need to remove the oil cooler to access teh cam cover
     
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  14. Make sure you use sealer on both sides of the rubber cam cover gasket and if it's misshaped in the packaging, sit it next to a fan heater to warm it up before fitting. This makes it more pliable and easier to seat.
     
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  15. Just a note on the radiator, only one fixing at the top is a bolt, the other side is just a pin that the radiator grommet slides on and off. Hope this helps.
     
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  16. Thank you both pieces of advice, i am on this job at lunch time (removal). Gasket should arrive today so will get it next to radiator in office but going to get cover either powder coat, cerakote or just plain old painted before i put it back on
     
  17. No problem, happy to help, good luck and hope it's an easy fix.
     
  18. OK findings to address:

    Cam cover
    On the horizontal cam cover I only had 4 of the rubber washers in place correctly.
    1 was completely missing.
    1 was really thick and splayed out all over the place. I think possibly someone has inadvertently put 2 back on the same bolt.
    So will need to get replacement washers.
    Cam cover itself going for vapour blast and will repaint

    Radiator
    Radiator short, main hoses. 2 very rusty jubilee clips at radiator-end of each hose. Not long before these fail so will be going in bin.
    Doesn't look like the hoses themselves are great either because of all the corrosion etc so might measure diameter and buy a piece of black "samco" to replace them.
    Wasn't able to save any coolant so will have to refill completely. Probably for the best although coolant was very clean.

    Air filters
    Couldn't work out how to remove radiator without removing air ducts / snorkels.
    Pulled out air filters while i was there. They are filthy.
    Just looked to get a replacement pair and they are insanely expensive for a pair of new ones compared to other bikes i have had
    Is there a cheat for these (reasonable off brand replacement, wash them, sock filters?, anything else)
     
  19. Yep, they get left because they are so expensive.
    There are aftermarket options available that although also expensive are at least washable.

    If you look carefully the filter material is held between an inner and outer stainless mesh.
    It is possible to remove the original foam and replace it with a washable type, I got mine from an old panel filter meant for a car I had hanging around.
    Obviously you do so at your own risk of slightly changing the airflow/mixture.

    Be careful when refitting the 3 special retaining screws that hold the tubes/filters in place.
    If you cross thread them or are too heavy handed and spin the captive inserts in the Airbox you are in a world of trouble.
    I have a spare Airbox with 'spun' inserts, and one of the many small 999 projects I plan is to fit studs that are well anchored somehow instead of the inserts.

    Oh - Welcome to 999 ownership :D
     
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  20. If you've not found it already there are a lot of useful images in my rebuild thread.
    This is page 2. The radiator/hoses bit is spread over pages 2,3 and 4. I went with Bling Blue Silicone.
    https://www.ducatiforum.co.uk/threads/project-999.87890/page-2
     
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