Infinity_QX56_2004-2005

Spark Plugs

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Inspection



Inspect the spark plug tip for wear and damage. If the tip is covered with carbon, replace the plug. Do not drop or shock the spark plug. If the ceramic body is broken replace the plug.

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the harness connector from the ignition coil.
  4.  
  5. Remove the ignition coil retaining bolt.
  6.  
  7. Remove the ignition coil.
  8.  
  9. Remove the spark plug using a spark plug socket and wrench.
  10.  

To install:

  1. Be sure the spark plug gap is to specification (0.043 in).
  2.  
  3. Carefully install the spark plug and torque to specification, 18 ft. lbs.
  4.  
  5. Install the ignition coil, torque the retaining bolt to 80 inch lbs.
  6.  
  7. Connect the harness coil.
  8.  
  9. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Spark plug and related components

  10.  

 
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