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Platinums are gapped at 0.60, and iridiums are typically gapped at 0.40... you shouldn't try to change the preset gaps.

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7y ago
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7y ago

With the 2.2 L engine and ACDelco R42LTS spark plugs, the gap is .040".With the 4.3 L engine and ACDelco R44LTS6 spark plugs, the gap is .060".

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