Autolite Copper Core Spark Plug Heat Ranges
BNaylor
12-09-2006, 10:48 PM
The following is a guide to heat ranges when using Autolite Copper Core spark plugs applicabe to '97 and up Grand Prixs with the Series II and III 3800 engines - L36, L67, L26 and L32.
Autolite 606 = stock heat range
Autolite 605 = one range colder
Autolite 104 = two ranges colder
Autolite 103 = three ranges colder
Gap may vary depending on mods. Stock gap = .060"
Autolite 606 = stock heat range
Autolite 605 = one range colder
Autolite 104 = two ranges colder
Autolite 103 = three ranges colder
Gap may vary depending on mods. Stock gap = .060"
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