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Originally Posted by GMMerlin
AC Delco P/N 41-985, is gapped to 1.01mm (0.040 inches) when the spark plug is made. The spark plug gap is set during manufacturing and should not be changed or damage to the spark plug may result. Any new spark plug found to not be properly gapped should not be used.
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GMMerlin you are an ace. Do you know if the parts department will give me a hassle for returning a plug that is not properly gapped? I can not thank all you guys for your help. huero.