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Thread: Standard 2.8 spark plug gaps

  1. #1
    Regular Member Largespanners's Avatar
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    Default Standard 2.8 spark plug gaps

    Hi All,

    I was wondering if i could ask any of you a favour?

    I am going to replace the spark plugs on my 2007 2.8 Elite auto tomorrow morning (when the engine is nice and cold!), and i was wondering if anyone could confirm the standard spark plug gap for me, just to give me peace of mind.

    I have the standard VX plugs, GM50 / NGK IR / DILFR7B-10G and look to be iridium tipped, and appear to be pre gapped at 1.00 mm.

    Iv'e done searches on the forum and there is plenty of topics regarding the type of plugs to use, but i couldn't find anything about standard plugs.

    Cheers in advance.

  2. #2
    Regular Member barney490's Avatar
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    Default

    DILFR7B-10G do come pre gapped at 1.00 mm, which is correct for your car. The -10G indicates the gap size.

  3. #3
    Ex Vec-C Admin Deztroyer's Avatar
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    as a bove - gapped at 1 or 1.1mm dependant on whos plugs and which technical blurb you read = fitted a set last sunday - which were Denso Irridiums and they were recommended by Denso to be gapped at 1.1mm
    they come pregapped and the tip on the denso's was .4mm so i gave a quick "visual" inspection and fittted without any issues

    0-Large smile ......every time it's driven

  4. #4
    Regular Member Largespanners's Avatar
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    Default

    Cheers guys, really appreciate the response.

    I'll just double check the gaps before i fit them in to be on the safe side (don't want to be removing the manifold any more than i have too!)

    Again, cheers

  5. #5
    Ex Vec-C Admin Deztroyer's Avatar
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    Default

    Quote Originally Posted by Largespanners View Post
    Cheers guys, really appreciate the response.

    I'll just double check the gaps before i fit them in to be on the safe side (don't want to be removing the manifold any more than i have too!)

    Again, cheers
    just make sure the coil pack connector is locked tightly on the back right bank as you look at it - i had a misfire on refitting and that was my cause

    0-Large smile ......every time it's driven

  6. #6
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    Vehicle : Vauxhall Astra-J

    Trim : Elite

    Engine : 2.0 CDTi

    Year : 2013

    Default

    Rule of thumb with multi-electrode plugs is never try and re-gap them. The spark will always travel across the shortest distance and if one gap is smaller than the rest, that electrode will wear down quicker than the rest.

    Only ever re-gap single electrode plugs.

  7. #7
    Ex Vec-C Admin Deztroyer's Avatar
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    Dave they are single electrode plugs

    0-Large smile ......every time it's driven

  8. #8
    Regular Member Largespanners's Avatar
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    Just a quickie.

    All done, fair amount of unplugging to do but nothing complicated. I didn't time myself, but the missus only offered me 2 cuppa's while i was in the garage, so i reckon about 2 hours from start to finish.

    Now that's done, it's time to get the old girl mapped....

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    well done mate - satisfying doing it yourself isnt it ....it makes you smile

    and a remap will make the smile larger

    0-Large smile ......every time it's driven

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