Northstar Engines and System Technical Discussion Discussion, Plugs - Spark plugs for a Northstar ?? in Cadillac Engine Discussion; What is the best sparkplug to put in the Northstar ? I have 116 k on the same set of ...
- 04-30-12 09:24 PM #1
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 .
- 04-30-12 10:06 PM #2
AC Delco, these engines don't like any other, go with the same for the wires
- 04-30-12 10:22 PM #3
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
- 05-01-12 07:00 PM #4
Sorry , 2003 DeVille with 116,000 on the clock
- 05-02-12 09:08 AM #5
Re: Plugs - Spark plugs for a Northstar ??
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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