Spark Plugs White Tip
Spark Plugs White Tip. If your spark plug has started to look white in colour, this indicates that something is making the plug run too hot. White deposits, melted electrodes, or blisters on the insulator tips show you have burnt spark plugs.
There is a risk that the engine won’t be operating at its best in this situation. Normal should appear tan to. Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot.