Plugs - Spark plugs for a Northstar ??
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Northstar Engines and System Technical Discussion Discussion, Plugs - Spark plugs for a Northstar ?? in Cadillac Engine Technical Discussion; What is the best sparkplug to put in the Northstar ? I have 116 k on the same set of ...
  1. #1
    bobstanster's Avatar
    bobstanster is offline Cadillac Owners Fanatic
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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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    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

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    Ranger's Avatar
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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

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    bobstanster's Avatar
    bobstanster is offline Cadillac Owners Fanatic
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    Sorry , 2003 DeVille with 116,000 on the clock

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    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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