Why do spark plug electrodes burn off?
Why do spark plug electrodes burn off? The higher the engine's revving range and output, the stronger is the vibration. Since the spark plugs are fitted in the engine's cylinder head, they are subject to the same vibrations as the engine. If it does loosen, it will be subject to abnormal vibration and this can cause the ground electrode to break off. What does a burnt out spark plug look like? Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. Causes can include the engine overheating, incorrect...