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Home >> Chevrolet >> 2011 >> Impala LTZ >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 3.9L - Repair Instructions >> Repair Instructions >> Spark Plug Replacement >> Removal Procedure
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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.
    Fig 1: View Of Left Side Spark Plug Wires
    GM1608802Courtesy of GENERAL MOTORS CORP.
  1. Remove the air cleaner outlet duct, if required. Refer to Air Cleaner Outlet Duct Replacement .
  2. Remove the intake manifold cover, if required. Refer to Intake Manifold Cover Replacement .
  3. Remove the left side spark plug wires from the spark plugs, if required.
    4. Fig 2: Right Side Spark Plug Wires & Ignition Coil
    GM1608803Courtesy of GENERAL MOTORS CORP.
  4. Remove the right side spark plug wires from the spark plugs, if required.
    5. Fig 3: Spark Plugs
    GM1587748Courtesy of GENERAL MOTORS CORP.
  5. Remove the spark plugs.
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