Q: Can old spark plugs be cleaned

A: Yes, you can clean spark plugs. However, it is good to remember that spark plugs are a wearable item, so it's important to make sure you check to see if it's worth cleaning before you go through the following steps.

• If the firing end is wet, make sure you clean the spark plug with
  a quick drying cleaner. (Examples: contact cleaner or brake cleaner).
• Sand blast the spark plug using low air pressure
  and use a dry compound.
• Completely blow all the sand from the spark plug.
• Using a wire brush clean the threads and re-gap.

NOTE: Insufficient cleaning of the spark plug may lead to spark plug failure in a very short period of time. Clean the spark plug thoroughly to avoid problems later. Remember, if a spark plug is fouling it's usually a result of engine side factors or incorrect heat range selection.

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