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Spark plugs 3.8V6

This is a discussion on Spark plugs 3.8V6 within the V6 forums, part of the Vehicle Specific category; I want to replace the original platinum sparkplugs AC Delco 41-921 from my 3.8V6 Camaro (2001). There are several topics ...

  1. #1
    Member pv-camaro's Avatar
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    Spark plugs 3.8V6

    I want to replace the original platinum sparkplugs AC Delco 41-921 from my 3.8V6 Camaro (2001).

    There are several topics about this issue, what is the best replacement:

    AC Delco 41-101 or NGK PTR4B or NGK TR55IX
    and should the gap be the same as original ?

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    Quote Originally Posted by pv-camaro View Post
    I want to replace the original platinum sparkplugs AC Delco 41-921 from my 3.8V6 Camaro (2001).

    There are several topics about this issue, what is the best replacement:

    AC Delco 41-101 or NGK PTR4B or NGK TR55IX
    and should the gap be the same as original ?
    Your 3800-II had Delco Iridiums (41-101) from the factory.... I run iriduims in everything.. Platnum 41-921's are not factory just an fyi.. You do not mess with the iridium gaps. They are factory set @ the proper gapping you can actually damage the electrodes trying to hand gap them.. NGK are junk plugs for the 3800-II imho..
    Last edited by Smittro; 05-26-2010 at 09:37 PM.
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    Member pv-camaro's Avatar
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    Light Pewter (11)
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    Quote Originally Posted by Smittro View Post
    Your 3800-II had Delco Iridiums (41-101) from the factory.... I run iriduims in everything.. Platnum 41-921's are not factory just an fyi....
    I did not remove the original sparkplugs yet, i had read the user manual that the 41-921 was the original one.

    I thought it was better to replace them, the car has only run 37.000km (23.000 miles) yet, but he is 9 years old.

    What does "fyi..." mean ?

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    Quote Originally Posted by pv-camaro View Post
    I did not remove the original sparkplugs yet, i had read the user manual that the 41-921 was the original one.

    I thought it was better to replace them, the car has only run 37.000km (23.000 miles) yet, but he is 9 years old.

    What does "fyi..." mean ?
    fyi = for your info. If your car has the y87 package in the RPO code then it came with iridiums..

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    Member pv-camaro's Avatar
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    Quote Originally Posted by Smittro View Post
    Your 3800-II had Delco Iridiums (41-101) from the factory.... I run iriduims in everything.. Platnum 41-921's are not factory just an fyi.. You do not mess with the iridium gaps. They are factory set @ the proper gapping you can actually damage the electrodes trying to hand gap them.. NGK are junk plugs for the 3800-II imho..
    I have removed one sparkplug, and it is a AC Delco 41-921, it must be the orginal ones.
    I am the second owner (almost 4 years, and bought it with 18.000miles), and the first owner (i spoke to him, and the garage, who delivered the car new) didn't replace them.


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    You know what, you're right! I have an old set of originals laying around checked the numbers and sure enough the numbers match the ones you posted.. My new ones are the 41-101's.. I can tell you though @ 80+k my old ones still look like yours. Good plug too in my book..
    Last edited by Smittro; 05-30-2010 at 06:04 AM.


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