2005 Hyundai Sonata 2.7 V6 Replace Spark Plugs

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The spark plugs on a 2007 Hyundai Sonata with the 2.7L V6 engine create the spark that's integral to the internal combustion process. These plugs can degrade over time, and when they do, your Hyundai will lose fuel efficiency and eventually the car will have problems running. To fix the problem, you have to remove the spark plugs and replace them with new ones. This process should take about an hour or so.

Tools Used[edit]

3/8-inch ratchet and socket set
Open-end wrench set
Spark-plug socket set
Replacement spark plugs
Spark-plug gapping tool

Replace Spark Plugs[edit]

  • Pop the hood. Unbolt the plastic engine cover from the top of the engine using the 3/8-inch ratchet and socket. Disconnect the injector connectors and the electrical connections near the spark plugs using your hands. Unbolt the coolant surge tank using the 3/8-inch ratchet and socket.
  • Grip one of the spark plug wires at the base with your hands. Pull it away from the engine using your hands, lifting up while simultaneously twisting the spark plug wire. Unbolt the spark plug from the cylinder head using the 3/8-inch ratchet and socket and the spark-plug socket. Discard the old spark plug.
  • Gap the replacement spark plug to .044 inches using the spark-plug gapping tool. Install the spark plug into the cylinder head using the ratchet and spark-plug socket. Push the spark plug wire onto the spark plug, listening for a popping sound that indicates the plug wire has locked onto the spark plug.
  • Repeat steps 2 and 3, working your way systematically from left to right, changing one single plug at a time until they are all replaced. If necessary, label the spark plugs with tape and a marker to know which ones you've replaced.