Lucerne V6-3.9L (2009)
Spark Plug: Service and Repair
Spark Plug Replacement
Removal Procedure
Caution: Observe the following service precautions:
*
Allow the engine to cool before removing the spark plugs. Attempting to remove spark plugs from a hot engine can cause the spark plugs to seize.
This can damage the cylinder head threads.
*
Clean the spark plug recess area before removing the spark plug. Failure to do so can result in engine damage due to dirt or foreign material
entering the cylinder head, or in contamination of the cylinder head threads. Contaminated threads may prevent proper seating of the new spark
plug.
*
Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the
vehicle. Installing spark plugs of another type can severely damage the engine.
1. Remove the air cleaner outlet duct, if required. Refer to Air Cleaner Outlet Duct Replacement (See: Air Cleaner Housing/Air Cleaner Fresh Air
Duct/Hose/Service and Repair).
2. Remove the intake manifold cover, if required. Refer to Intake Manifold Cover Replacement (See: Engine, Cooling and Exhaust/Engine/Intake
Manifold/Service and Repair).
3. Remove the left side spark plug wires from the spark plugs, if required.