How to Change Spark Plugs in Your Car

This is a spark plug gapper, you need this tool to replace old spark plugs.

Old spark plugs will cause your car to not run at its best and will also decrease the amount of miles per gallon you will get. Spark plugs are very simple to replace and can be done with only a few simple tools.

Things You'll Need

• Ratchet
• Spark plug socket
• New spark plugs
• New spark plug wires
• Spark plug gapper

Instructions

1. 

   Open the hood of your car and locate the distributor cap. This will be on top of the engine and will b where all of the spark plug wires come out of.

2. Remove only one spark plug wire from the distributor cap and follow it down to the spark plug in the engine.

3. 

   Remove the old spark plug from the engine using a spark plug socket.

4. 

   Gap the new spark plug. The gap for your engine can be found out from your local auto parts dealer. Insert the gapper into the spark plug and move it to the proper distance marked on the gapper.

5. 

   Replace the old spark plug with the new one. Tighten the spark plug but do not tighten it to the point of stripping out the threads.

6. Replace the old spark plug wire with a new one. Use the old wire to compare to the new ones to make sure you are selecting the proper wire from the new set. Connect one end of the wire to the spark plug and the other end to the distributor cap.

7. Repeat from step 2 above for each of the spark plugs in your engine.

Tips & Warnings

• Only replace one spark plug and wire at a time, you can not confuse where the wire hook up to.