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Thread: Spark Plug Gap

  1. #1
    Regular Member Gogs67's Avatar
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    Default Spark Plug Gap

    Just serviced my 2006 1.8 VVT SRi, with all genuine Vx items. Can anyone tell me if the gap on the spark plugs is factory-set or should be they gapped before fitting? If so, does anyone have the correct gap info? 1 Vx dealer I checked with told me that they are pre-set; another told me that they have to be manually set, however he didn't have any info

    The plugs are labeled Bosch GM34 and have FQR8LEU2 stamped on the metal ring between the thread and the insulator.

    Also noted that the new plugs are single electrode, any plugs I've fitted to Veccys in the past have been multi-electrode, however according to the Vx Trade Club site they are the correct plugs.

    Confused

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    Regular Member bobby-tupper's Avatar
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    ive never checked the gap before fitting genuine plugs mate ,believe they are gapped at the factory. hth

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    Regular Member Gogs67's Avatar
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    Quote Originally Posted by bobby-tupper View Post
    ive never checked the gap before fitting genuine plugs mate ,believe they are gapped at the factory. hth
    That's what I thought mate, however on measuring the gap on each plug out of the box, I found that they were all slightly different, ranging from 0.6mm to 1.0mm

    Anyway I e-mailed Vauxhall's tech department and received the following response this morning:

    Thank you for your e-mail dated 20 September 2009, regarding your Vauxhall Vectra DU06 XZC.

    In response to your enquiry our Technical Department advised that the gap on each spark plug for the Z18XER engine is 1.0 mm.

    Thank you for contacting Vauxhall Motors and allowing me the opportunity to comment.

    Bosch didn't bother responding to my enquiry, and a VX dealer near to where I'm working just now didn't have a clue when asked

    Going to re-check the plugs later on today

  4. #4
    Ex Vec-C Admin Deztroyer's Avatar
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    think the standard gap is 1mm = same as advised on the 2.0turbo z20net engine as well

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

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