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What is the required spark plug gap on a 3100 engine for a 1999 Buick Century Custom?

VernE ∙

Lvl 1

∙ 18y ago

Updated: 10/26/2022

I believe my 1995 Century has the same motor (3100). My gap setting is .060 inches. You can double check in the "capacities and specifications" section in your owner's manual. Or triple check on your emissions sticker under the hood, usually on the passenger strut tower.

Wiki User

∙ 18y ago

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