After you remove the plastic engine cover. You will see the front 3 plugs across the front of the engine with coilpacks on top of them. You will see 3 plug wires that go from those 3 coilpacks around the passenger side of the engine to the back side where the other 3 plugs are located. To get to those 3 plugs you will need to remove the intake plenum. This part is tricky, and will require a new gasket. Don't forget where all the wires and hoses came from. Good luck
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http://en.allexperts.com/q/Hyundai-Repair-815/change-spark-plugs-XG300-1.htm
spark plug socket extention and rachet pull boots off plugs and have at it
how do you change the spark plugs in a trajet hyundi i have change the front one but the back one nearest the fire wall i dont no how to get to thanks for your help
Well it is easy to get to the front spark plugs but you are going to have to take off the intake manifold to get to the rear ones. Not an easy job. Probably have to pay big bucks at a garage to do this unless you can do it yourself.
Disconnect the battery, remove the engine cover, remove the spark plugs wires and boots, and remove the spark plugs. Put in the new spark plugs, replace the spark plug wires and boots, replace the engine cover, and connect the battery.
when do you change spark plugs
http://www.santafemods.com/Mods/SparkPlugReplacement.htm
My car 2007 is a four cylinder Hyundai sonata Is there any truth to what the service manager said about having to remove the manifold to change the spark plugs?