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Home >> Saturn >> 2007 >> Relay 3.9 1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - Introduction (2 Of 2) >> Repair Instructions >> Spark Plug Replacement >> Removal Procedure
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Removal Procedure

NOTE: 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 Spark Plug/Coil Harness
    GM1582091Courtesy 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.
    4. Fig 2: View Of Spark Plug Wire Assembly
    GM1582938Courtesy of GENERAL MOTORS CORP.
  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 3: Removing/Installing Spark Plugs
    GM1587748Courtesy of GENERAL MOTORS CORP.
  6. Remove the spark plugs.
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