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Spark Plug "Tips"

by Ron Bak

When purchasing new spark plugs, use the specified manufacturer's plugs when possible. If not, replace them with a well-known brand such as Champion, A/C Delco, Bosch, etc. Don't waste your money on the hyped-up, "newest breakthrough" in spark plug technology. These plugs rarely pay for themselves in fuel economy or longevity.

Check the plug gap against your car's specifications, even if they've been preset. Use compressed air to blow debris away from around the spark plug before removing plug. Pull on the plug boot, not the wire.

When replacing the spark plugs, use a small amount of anti-seize compound on the threads to avoid galvanic reaction with the cylinder head. Use a small amount of dielectric grease on the inside of the plug boot where the boot contacts the ceramic insulator of the plug.

Check the condition of the plugs to get an idea of what is going on inside the combustion chambers.