Quote:
Originally Posted by Artstu
The 1/4 turn is really for used plugs, I'd say new ones need at least another 1/4 turn if not a bit more.
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NGK's own advice for 10mm & 12mm plugs is 180 degrees from finger tight for new plugs, and 30 degrees for used plugs.
http://www.ngk-sparkplugs.jp/english...q18/index.html