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LS1 (2002) spark plug change tips

This is a discussion on LS1 (2002) spark plug change tips within the General Help forums, part of the LSx Technical Help Section category; I thought I heard the stock gap was .059. Just short of .060 like the NGK TR55's. Maybe I heard ...

  1. #41
    Junior Member
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    Black
    2000 Camaro SS

    I thought I heard the stock gap was .059. Just short of .060 like the NGK TR55's. Maybe I heard wrong. I just left mine at .060. No problems here.

    I got mine off Jegs.

  2. #42
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Just to add to the confusion, when GM switched to the iridium tip plugs for LS engines, they came out with a service bulletin that says the proper gap for the iridium tip plugs is .040"

  3. #43
    Single Malt rbob93's Avatar
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    Sebring Silver
    2000 CamaroSS

    Quote Originally Posted by Cutlass View Post
    Just to add to the confusion, when GM switched to the iridium tip plugs for LS engines, they came out with a service bulletin that says the proper gap for the iridium tip plugs is .040"
    Yep.....iridiums were developed because some engines have plugs so inaccessable, they needed extended replacement intervals.
    Iridiums last way longer than platinum plugs because they can take higher temps.
    The tip on iridiums is a very small diameter & can be bent very easily.
    It is not recommended to try & re-gap them.

  4. #44
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    silver
    2000 formula

    i have a ignition book written by Dr Jacobs.......a ignition guru IMO......he started jacob ignition products.......which i USED to use exclusively......til he sold it......and it went downhill.......in his book he discusses how one of the best things you can do is to increase your plug gap....but also increasing gap means having a system that is up to snuff....ie.....wires and coil

  5. #45
    Member rkvette's Avatar
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    victory red
    2007 zo6

    thanks for that tip.. i have heard that before, and it makes sense. rkvette

  6. #46
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    Black
    2000 Camaro SS

    After reading through some of that I see why mine were at .060. I bought the TR55 platinum plugs, thus the .060 platinum's need for optimal spark.

  7. #47
    Member Blue28's Avatar
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    Navy Blue
    1999 Camaro Z28

    99-02 valve covers and coil mounts are all the same, I would always remove the whole coil pack assembly on the passenger side(for us people with big forearms, and or hands) and as far as the rear most bolt for the coil pack bracket I never reused it; just leave it off!

  8. #48
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    silver
    2000 formula

    has anyone seen the new accel silver plugs???? 40$ a plug !!!!! WTF..............

  9. #49
    Senior Member JayTA98's Avatar
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    1998 Trans Am

    damm thats outrageous,but again they have silver...

  10. #50
    Member rkvette's Avatar
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    victory red
    2007 zo6

    these new sparkplugs, are just great !!! my first corvette was a 1967 big block conv., 427/435 horse .. this vette had loads of torque/power.. spark plugs would may make it 100 miles.,, sometimes.??. the problem was hot cam /factory carbs,no unleaded gas, no high spark, had points system !! i would have to beat it ,, hold on high side rpm's to keep them clean... i would index them all ,burn old amaco white gas seemed to make last a little longer.. i wish i still had it today, loved loud sidepipes and legal !! rkvette

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