Spark plugs reading....
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Thread: Spark plugs reading....

  1. #1
    1000+ Posts PugMonkey's Avatar
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    Default Spark plugs reading....

    Can any of the brain trust help me to determine why cylinder 2 has ended up looking like this? All the colours look good but cylinder 2 came out with a growth on it.

    Thanks heaps.

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    Ps, these Bosch plugs I put in quite a while back to experiment with performance and humbly forgot they were in there. No problem with performance but today was the first time I've had to service in a while.

    Sent from my GT-I9305T using aussiefrogs mobile app

    Spark plugs reading....-20171029_153637.jpg

    I've gone back to copper plugs because I still feel copper is a better conductor.

    Last edited by PugMonkey; 29th October 2017 at 05:11 PM.
    ....now watch a Peugeot turn into a corner!

  2. #2
    Fellow Frogger! Roland's Avatar
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    No Picture!!
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  3. #3
    1000+ Posts PugMonkey's Avatar
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    trying to post a pick but it wont let me....
    ....now watch a Peugeot turn into a corner!

  4. #4
    the famous 18E pug206gti's Avatar
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    Quote Originally Posted by PugMonkey View Post
    trying to post a pick but it wont let me....

    G'day,
    here you go...

    Spark plugs reading....-pick.png
    Roland and 27of85 like this.
    regards,
    Les W.


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  5. #5
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    Quote Originally Posted by PugMonkey View Post
    Can any of the brain trust help me to determine why cylinder 2 has ended up looking like this? All the colours look good but cylinder 2 came out with a growth on it.

    Thanks heaps.

    Ps, these Bosch plugs I put in quite a while back to experiment with performance and humbly forgot they were in there. No problem with performance but today was the first time I've had to service in a while.

    Sent from my GT-I9305T using aussiefrogs mobile appClick image for larger version. 

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    Looks like cancer...

  6. #6
    1000+ Posts PugMonkey's Avatar
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    My kind of humour! Gratis!

    Picture is now up.
    ....now watch a Peugeot turn into a corner!

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    Gratis? or Grazie?

    I would think that the residue is the result of burning oil, so a compression test would be in order, but not necessarily definitive. In theory if compression is even on all 4, then the valve stem seals would be suspect, but I believe it is possible for the fault to be the oil ring alone, with no wear/damage to the compression rings, so no effect on compression.

    Cheers

    Alec

  8. #8
    1000+ Posts robmac's Avatar
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    I'd go with "ash fouled"

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  9. #9
    BVH Roger Wilkinson's Avatar
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    In my experience those 4-electrode plugs don't last long in a tired engine. They foul quickly. When my sister had an Alfa Romeo I found I needed to change the spark plugs at least twice a year.

    Roger

  10. #10
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    I suspect ash too. You might find this helpful: http://beru.federalmogul.com/sites/d...-_en_lores.pdf

  11. #11
    Too many posts! JohnW's Avatar
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    My R8 plugs do exactly that when I drive long distances. I find I need to clean them every 5,000 to 10,000 km. First symptom is misfiring under load. The engines uses practically no oil, but for long distances I add the lead substitute in the recommended proportions.
    JohnW

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  12. #12
    Fellow Frogger! driven's Avatar
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    Bosch shows what the issues are and possible fixes

    Engine is worn with many alloy particles in oil, change oil asap at least

    http://www.bosch-classic.com/media/e..._gesichter.pdf

  13. #13
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    PCV mist isnít directed towards that cylinder, I take it.


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  14. #14
    Fellow Frogger! Bluey's Avatar
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    What engine?

  15. #15
    1000+ Posts PugMonkey's Avatar
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    XU9J4 Mi16 1.9
    ....now watch a Peugeot turn into a corner!

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