Plugs & Gap? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 09-14-2010, 12:38 PM   #1
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Exclamation Plugs & Gap?

anybody know the Stock AC DELCO part # for plugs and GAP for 98 SSEI?
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Old 09-14-2010, 12:45 PM   #2
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Looks like the part # is 4638-05005479 and I believe the gap is .060
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Old 09-14-2010, 12:46 PM   #3
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Sweet Thanks Dan!
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Old 09-14-2010, 01:05 PM   #4
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Copper Core?
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Old 09-14-2010, 01:50 PM   #5
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gap is definitely .060

i have a p/n on the plugs as 41-921 though.
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Old 09-14-2010, 01:54 PM   #6
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ya gap id .60 was looking on rock auto and not sure whitch would be best for forced induction I think factory plugs are copper but not sure................
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Old 09-14-2010, 01:58 PM   #7
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generally speaking, the coppers aren't going to last as long as platinum or iridium plugs, but will perform the same until they get around to needing replaced.
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