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Thread: Plugs - Spark plugs for a Northstar ??

  1. #1
    bobstanster's Avatar
    bobstanster is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville
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    Plugs - Spark plugs for a Northstar ??

    What is the best sparkplug to put in the Northstar ? I have 116 k on the same set of plugs and think it is time to replace them .


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  3. #2
    vincentm's Avatar
    vincentm is offline Cadillac Owners Connoisseur
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    AC Delco, these engines don't like any other, go with the same for the wires
    Last edited by vincentm; 05-01-12 at 01:06 AM.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Plugs

    Update your profile to show your model and year. It will help us help you.
    pre-2000 A/C Delco 41-950
    2000+ A/C Delco 41-987

  5. #4
    bobstanster's Avatar
    bobstanster is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville
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    Sorry , 2003 DeVille with 116,000 on the clock

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Plugs - Spark plugs for a Northstar ??

    Quote Originally Posted by bobstanster View Post
    Sorry , 2003 DeVille with 116,000 on the clock
    Update your profile "What I drive" - and your login header will change to something like ours ^^^. You can supply a bunch of necessary, oft-repeated info that way...........

    You may find that your original plugs are DENSO models - not to worry. DENSO makes the AC Delco platinum plugs for Cadillac: the AC Delco #41-987 is the same plug. Read the box. Some of the 2002 - 2003 owner's manuals still listed the DENSO plug number.


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