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Omitting plugs from service.

Discussion in 'Leon Mk3 (2012-2020)' started by martin j., Oct 7, 2019.

  1. martin j.

    martin j. Active Member

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    Car is in this week for a major service in which plugs are due to be changed, car is nearly 5 year old but only 21k miles, fuel consumption is better than ever and drives fine, so is it worth still having the plugs done or leave alone since it’s fine.?
    If it ain’t broke don’t fix it, maybe.
     
  2. Legojon

    Legojon I only wanted a remap
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    I'd let them change them as a precaution. Or at the very least, remove and inspect them. My tuner recommends changing them yearly, but that's because the Revo map runs quite rich. But if it costs you £30 every 5 years but keeps your engine running great. I'd go for it... so long as they use a reputable brand (I always use NGK).
     
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  3. Lozzy15

    Lozzy15 Mods mods mods
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    Plus 1 for NGK. Don't ever use champion (If they even make plugs that fit this engine) they are trash.
     
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  4. LouG

    LouG Active Member

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    Plugs are mileage dependant. Iridiums are good for 100,000 km's, almost not a service item anymore.
    I'd leave them if there's no sign of issues.
     
  5. Rooster

    Rooster Active Member

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    It’s a good idea to have the spark plugs removed every couple of years or so, if only to prevent them becoming seized in the cylinder head.
     
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  6. Legojon

    Legojon I only wanted a remap
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    Good point. My cylinder 1 is quite rusted... which spreads to the coil pack. So I like to pop it out once a year and clean it up! Even yearly, it takes some force!
     
  7. If VAG recommend 60,000 km or 4 years for replacement I would use that as a minimum (I also change mine yearly)
     
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  8. Brackett

    Brackett Active Member

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    Reminds me, I keep meaning to get a new spark plug for my mower! :thumbup:
     
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  9. cupra14

    cupra14 Active Member

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    Interesting idea! (Though I got some iridiums out of a V8 with no problems after 100K miles at 10 years old.)
     
  10. RUM4MO

    RUM4MO Active Member

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    My American cousin asked for Tonto wine in Barcelona the other day, that made the waiter smile! (hi-ho Silver).

    I've always replaced plugs at the recommended time, which in my case means "years" and not months. I thought that most modern VW Group cars had moved to 4 years for plugs, for a while VW Group fitted seriously expensive plugs and said they were good for 6 years, but not so much now.

    NGK has always worked for me in VW Group cars.
     
  11. RUM4MO

    RUM4MO Active Member

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    Did mine last year!
     
  12. AndrewJB

    AndrewJB Friend to SEAT UK & Cupra Racing

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    I did mine after 3 years, upgraded plugs and fitted the newer revision coilpacks just for the sake of it to be honest.
     
  13. Yes standard is 4 years except in Africa where its 2
     
  14. martin j.

    martin j. Active Member

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    Aha, He meant Tinto? Red wine.

    My Hondas plug change is 72k or 54 months but the tech reckons that at 40k in 10 years they are good yet, car run fine and the mot emissions are low they’re working fine, leave alone.
    I’ll just let the garage change as per service unless they say otherwise, we often left plugs unchanged at service time in the garage if they seemed ok hence the question.
     
  15. It also depends on what car you have, how you drive it and the state of the tune (eg stock or modified) I have certainly had plugs replaced much sooner after a hard couple track sessions. But for stock cars yes you can go longer but VW Set these service intervals to give the car longevity and performance so in my view you should replace them when specified. Would also be interesting to see what is recorded on ERWIN now if they show you had major service but no plugs change.
     
  16. LouG

    LouG Active Member

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    Anti seize compound is always a good idea on plug threads. Some forum threads too.
     
  17. cupra14

    cupra14 Active Member

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    First check whether they already have such a coating (e.g. NGK iridiums) or the maker says not to do that. Also, beware of the torque you use if you do add anti-seize. (Dry & wet torques are different.)
     
  18. LouG

    LouG Active Member

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    True, but plugs have crush washers.
     
  19. Walone

    Walone Active Member

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    Not plugs with tapered seats.
     
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  20. BigJase88

    BigJase88 Jase

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    even if you remove them just to check them you may as well change them

    what with the labour cost to inspect might as well change

    also spark plugs have a washer where its a once use item, I know it sounds crazy but once removed you should replace with a new item, (manufacturer guidelines) as cannot guarantee seal
     

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