Servicing Item 13: Spark Plugs

Check the spark plug electrode gap with spark plug gage every 3000 miles and before installing new spark plugs. If necessary, adjust the gap to the specified size of a = 0.024 + 0.004" by bending the side electrode. Figure 44
Do not clean spark plugs with a metal brush, -- apply a graphite lubricant to the threads before screwing the plug into the cylinder head. It is a good practice to replace the spark plugs every 10000 miles.