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Spark Plugs - Replacement Guide: A general guide to replacing spark plugs. Illustrated: Bosch Spark Plug 1. Disconnect the wire from the Spark Plug, leaving the other end of the wire attached to the Distributor Cap. Disconnect by grasping the wire's rubber boot and twisting it away gently. 2. Remove the old spark plug, using a socket wrench, an extender and a spark-plug socket. 3. Prepare each new plug before installing it: Use a feeler gauge to "gap" the new plug. Check your owner's manual or a service manual to determine the correct gap, then slide the appropriate-sized feeler between the electrodes . The feeler should slide out freely, with only a slight drag. If the electrode needs to be adjusted, use the adjuster on the end of the tool. Apply a small amount of antiseize lubricant to the threads on the new plugs to make sure they can be removed the next time the plugs need replacing. 4. Install the new plug, using the extender and the spark-plug socket. Take care not to cross threads. Use a torque wrench to tighten the plug to the proper specifications, as indicated by your owner's manual. 5. Apply some dielectric grease to the ends of the new wire to ensure good contact. Reconnect the wire by carefully replacing the boot over the plug. 6.Repeat the process for each plug and wire. :: Recommended Reading / Videos :: :: Recommended material containing aditional info about Spark Plugs - Replacement Guide ::

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