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Oil on spark plugs - Cause for concern? '17 1.5 ecoboost

R18RHT
R18RHT
in Ford Focus Club

Featured Replies

Hi all,
I just changed my spark plugs on my 2017 Focus 1.5 ecoboost (M8DD) at 67k miles.

There is oil on the threads of the plugs from cylinders 1 & 2. Plugs from 3 & 4 are dry.

I have searched the web for the answer but half of the results say that it is absolutely normal, and the other half say that it is caused by a leaking valve gasket.

Please can anyone with experience with this engine tell me if I have an issue or not?

Thanks!

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    I'm assuming there cycling 1234 in left to right order, if so, I'd be suspicious of cylinder 2 as thats the only plug with black ceramic, the others look healthy from the ceramic colour.

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    • Like 1

    From the look of them they just look like they've been in way way too long, especially number 4

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    • Like 2
    • Author

    Thanks both,

     

    That can probably be put down to running a map on it previous which clearly wasn't right (superchips bluefin) - it caused it to fail an MOT on emissions and stank after driving it hard. I took it off and replaced with the standard map and it got through the re-test fine. 

    Probably a blessing in disguise as I since learned of this engine being prone to crack the block, especially on the 182hp version over the 150hp which I have.

    I'll leave it as is then and check the new plugs in a few thousand miles just to be sure.

     

    Thanks!

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    • Like 1

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