Crossfire V6-3.2L VIN L (2004)
CHIPPED ELECTRODE
INSULATOR A chipped electrode insulator (3) usually results from bending the center electrode (2) while adjusting the spark plug electrode gap. Under
certain conditions, severe detonation can also separate the insulator from the center electrode. Spark plugs with this condition must be replaced.
PREIGNITION DAMAGE
Preignition damage is usually caused by excessive combustion chamber temperature. The center electrode (2) dissolves first and the ground electrode (1)
dissolves somewhat later. Insulators appear relatively deposit free. Determine if the spark plug has the correct heat range rating for the engine. Determine
if ignition timing is over advanced or if other operating conditions are causing engine overheating. (The heat range rating refers to the operating
temperature of a particular type spark plug. Spark plugs are designed to operate within specific temperature ranges. This depends upon the thickness and
length of the center electrode s porcelain insulator.
