How to change your sparkplugs - Page 6
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This is a discussion on How to change your sparkplugs within the Maintenance, service, and repair forums, part of the Tutorials & DIY category; uuughg???...what?...

  1. #76
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    uuughg???...what?

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  3. #77
    Moderating on the run! Big Sky WRX's Avatar
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    As this thread is concerning spark plugs you want a flex head spark plug socket for sure- also the locking extensions I pointed out are helpful as well.

    In general I use my flex head sockets a lot- I have set from 10mm, 12mm, 14mm, 17mm (3/8" drive).

    I've got a couple of flex head ratchets as well.
    "Simplify and add lightness." - Colin Chapman

  4. #78
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by Big Sky WRX
    As this thread is concerning spark plugs you want a flex head spark plug socket for sure- also the locking extensions I pointed out are helpful as well.

    In general I use my flex head sockets a lot- I have set from 10mm, 12mm, 14mm, 17mm (3/8" drive).

    I've got a couple of flex head ratchets as well.
    Flex head sockets are great. I need to pick up a nice set for working on the sube.

    I've also found this to be invaluable. Wobble Extension

    Just right if you just need a little bit but if it's in a tight spot where you can't get a hand to hold a universal joint.
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  5. #79
    Registered User turbo_bxr's Avatar
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    Quote Originally Posted by SubeN'Siren
    uuughg???...what?

    i must have misread your comment

  6. #80
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    today i'm installing NGK iridiums and next month i'm installing a VF39 with supporting mods and protune for the AP.....would these plugs be good for my application...and also the person at the auto parts store where i purchased my plugs told me they come pregapped at 0.44....i think i'm going to close that a bit to 0.34 or .035....any input on this?
    Quote Originally Posted by ansonowicz View Post
    So if I'm stuck in a rut or something, it's mostly because I made a wrong decision somewhere and I need to correct myself out of it.

  7. #81
    Moderating on the run! Big Sky WRX's Avatar
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    I'd suggest w/ the turbo upgrade (and the subsequent increase in hp) to go one step colder.

    Also you have the wrong plugs if they are .044, you want them ~ .028. Find plugs that come pre-gapped closer to .030. When you close the gap too much the angle is ususally less than optimum- w/ iridiums you also run the risk of damaging them.
    "Simplify and add lightness." - Colin Chapman

  8. #82
    Registered User STIaddict's Avatar
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    Good info and nice work on putting it together. Well I have 65K on my stockers and haven't had any problems yet! Of course I am stock except a TB exhaust. Car runs fine and doesn't run rough. I drive spirted at at times but not abusive.

    Been meaning to get to replacing them but been busy. Hopefully there not that different from my old 00RS. I am always good about maintenance but let my plugs go longer if all is well. Thanks for the insight.

  9. #83
    Registered User PolarisSnT's Avatar
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    Ive already changed my plugs once at 30k and I bought them from the dealer and checked em out and the gap was right. I just ordered a set of 1 step colder and Im concerned about gapping. I have a gapping tool but if I need to adjust the gap how do I do it? Just usr pressure to close the gap? I dont want to break anything.
    Dan- 2004 PSM 5spd

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  10. #84
    Moderating on the run! Big Sky WRX's Avatar
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    If the gap is very large- I consider taking them back for a closer fit. There are some plugs that are gapped too large IMO. It's almost impossible to get a good even gap w/ those.

    If it's just a litlle wide, tap the plug gently on a firm surface- measure, tap again if necessary.
    "Simplify and add lightness." - Colin Chapman

  11. #85
    Registered User turbo_bxr's Avatar
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    Quote Originally Posted by Big Sky WRX
    If the gap is very large- I consider taking them back for a closer fit. There are some plugs that are gapped too large IMO. It's almost impossible to get a good even gap w/ those.

    If it's just a litlle wide, tap the plug gently on a firm surface- measure, tap again if necessary.
    i had to do this with dealer plugs. they were close to .040 i believe.

  12. #86
    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by turbo_bxr
    i had to do this with dealer plugs. they were close to .040 i believe.
    they gave you the wrong size then- the oem plugs are gapped right at .030 from the factory (NGK)
    "Simplify and add lightness." - Colin Chapman

  13. #87
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    ...Just got done changing my plugs, thanks, I wouldn't have been able to figure it out on my own (I probably could have, but I don't like to just go taking things apart!).

    I found that a 1/4" drive works way better than a 3/8" flex socket to take the coils off. The 1/4" drive I have (ace hardware) fits right down in there.

    If you have a variety of tools to work with, it makes the job easier (obviously), I was swiching back and forth between different ratchets, because this one won't fit in the space, or that one isn't long enough, etc.

    Just my $0.02!

    Big thanks again!

  14. #88
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    Finally did the plugs last weekend for the first time on the car using this post as a guide. A bit overdue at 108K on the OEM plugs. Went very smoothly, so thanks!

    However, did not need flex sockets. Got it done with a 3/8 drive and a short locking extension. Only trick was to get the drive off the socket a few turns after loosening (flat blade screwdriver helps) and do the rest by turning the extension by hand. Even found enough room to get a mini torque wrench on the plug and the coil pack bolt for tightening up again.

  15. #89
    Registered User Sotbas's Avatar
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    I'm about to get a set of plugs to attempt this. I was looking up plugs on sparkplugs.com and they have NGK platinum and double platinum. It says that the double platinum are the OEM plugs and are 11.71 as opposed to 2.68 for the regular platinum. Which ones should I go with?

  16. #90
    Moderating on the run! Big Sky WRX's Avatar
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    My guess is they will peform similarly- the double platinums probably last longer.
    "Simplify and add lightness." - Colin Chapman

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