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Thread: Puma 2.4 oil blowby?

  1. #1
    Join Date
    Apr 2018
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    Sydney
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    Puma 2.4 oil blowby?

    G'day

    I've noticed a decent amount of oil in my catch can and leaking from the exit intercooler hose (intake manifold side) of late.

    So checked this am by taking the oil cap off at running temp while running. Lo and behold it's ticking and spitting oil out the cap (and plenty of vapour).

    What are the thoughts on cause? Injector seat? Or more sinister piston rings?

    Can get a video if it would help diagnose?

    Thanks
    Gus

  2. #2
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    More digging online, and to pre-emptively answer my own question (such that anyone in the future may have a similar issue and stumble on this), very much seems like an injector seating issue.

    Not sure if allowed here, cross-posting to another forum but the below thread pretty much exactly describes it.

    DEFENDER2.NET - View topic - Excess Chuff? (Possible high engine crank case pressure)

    And before video (from thread - near enough to exactly same as mine):

    DEFENDER2.NET - View topic - Excess Chuff? (Possible high engine crank case pressure)

    And after cleaning/seating injectors:

    Chuff Update - YouTube

    Good thing stuck in lockdown!

  3. #3
    Join Date
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    Might be worth checking for a crack in the exhaust manifold or a leak caused by a loose bolt.
    2009 Defender 110 2.4. ARB bulbar, Ironman winch, Safari snorkel, Steinbauer chip, AP HD clutch, Lightforce spots, larger tank, Off Road Systems drawer, Traxide 160 controller, Tekonsha brakes, Mulgo seat runners, Uniden UHF, Nuggetstuff seat corners, breathers, Polaris GPS.

  4. #4
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    Quote Originally Posted by DiscoMick View Post
    Might be worth checking for a crack in the exhaust manifold or a leak caused by a loose bolt.
    Thanks Mick - for my learning how would a crack / leak in the exhaust manifold lead to oil / exhaust spitting out the oil filler?

    Or do you mean just the oil spitting out of the hoses?

  5. #5
    Join Date
    Apr 2008
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    Brisbane,some of the time.
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    Catch can could be culprit,bypass it and see how you go.

    Engine oil not over full?

    If problem still persists,compression test is probably the next thing to do,or take it to your local indie,and see what they say.
    Paul

    D2,D2,D2a,D4,'09 Defender 110(sons), all moved on.

    '56 S1,been in the family since...'56
    Comes out of hibernation every few months for a run

  6. #6
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    Quote Originally Posted by scarry View Post
    Catch can could be culprit,bypass it and see how you go.

    Engine oil not over full?

    If problem still persists,compression test is probably the next thing to do,or take it to your local indie,and see what they say.
    Thanks for your input Scarry. Hadn't considered the possibility the issue could be the catch can! I'll have to check... Gut feel is its okay as it is filling (too) well still so if it was blocked up and restricting the rocker case pressure it probably wouldnt be getting much oil into it.

    Oils good - measured it last change (5k km ago) and dipstick is about half / two thirds up the hatched part.

    I'm thinking its these injector seats but if not that will be the way I go! The two inner injector seals in the rocker case have had quite a bit of oil seepage / plenty of gunk built up, especially second to front, so expecting it'll be that one/combo of that and the other. Plan to pull the injectors and have a peek down the barrel this weekend. I'll report back with pics for future ref

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