Broken, Cracked or Chipped Insulator

Chipped Electrode Insulator:

Note: Replace any spark plugs which have cracked broken or chipped insulators.

Symptoms: Insulator chipped or broken.

Possible Causes:

^ Usually results from bending the center electrode while adjusting the spark plug electrode gap.

^ Severe detonation also can separate the insulator from the center electrode.

^ Sudden Rise In Tip Temperature.

^ Severe Operating Conditions.

^ Improper Gapping Of Plugs.