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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 186 (Engine Controls - 3.9L - Introduction (2 Of 2)) >> Repair Instructions >> Spark Plug Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Notice: 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 .
  2. Remove the intake manifold cover, if required. Refer to INTAKE MANIFOLD COVER REPLACEMENT .
    3. Fig 1: View Of Left Spark Plug/Coil Harness
    GM1582091Courtesy of GENERAL MOTORS CORP.
  3. Remove the left side spark plug wires from the spark plugs.
  4. Rotate the engine for access, if required. Refer to ROTATING THE ENGINE FOR SERVICE ACCESS .
  5. Remove the right side spark plug wires from the spark plugs.
    6. Fig 2: Removing/Installing Spark Plugs
    GM1587748Courtesy of GENERAL MOTORS CORP.
  6. Remove the spark plugs.
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