Honda Pilot - 2003-2005

Spark Plugs

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Inspection



Inspect the electrodes and ceramic insulator.

Burned or worn electrodes may be caused by:



Advanced ignition timing
 
Loose spark plug
 
Plug heat range too hot
 
Insufficient cooling
 

Fouled plug may be caused by:



Retarded ignition timing
 
Oil in combustion chamber
 
Incorrect spark plug gap
 
Plug heat range too cold
 
Excessive idling/low speed running
 
Clogged air cleaner element
 
Deteriorated ignition coils

Click image to see an enlarged view

Fig. Spark plug inspection

 

Do not adjust the gap (A) of platinum tip plugs; replace the spark plug if the gap is out of specification. The gap should be:

  1. Standard (new): 0.039-0.043 in. (1.0-1.1mm)
  2.  
  3. Service Limit: 0.051 in. (1.3mm)

    Click image to see an enlarged view

    Fig. Do not adjust the gap (A) of platinum tip plugs; replace the spark plug if the gap is out of specification

  4.  

  1. Replace the plug at the specified interval or if the center electrode is rounded (A). Use only the spark plugs listed below:
    1. NGK: PZFRF-11
    2.  
    3. DENSO: PJK16CR-L11

      Click image to see an enlarged view

      Fig. The spark plug must be replaced at the proper service interval, or if the center electrode (A) is rounded and worn

    4.  

  2.  
  3. Apply a small quantity of anti-seize compound to the plug threads, and screw the plugs into the cylinder head finger-tight. Then tighten the spark plugs to 13 ft. lbs. (18 Nm).
  4.  

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Remove the ignition coil(s), as outlined in this section.
  4.  
  5. Remove the spark plug.
  6.  
  7. Inspect the spark plug, as outlined in this section.
  8.  

To install:

  1. Apply a small quantity of anti-seize compound to the plug threads, and screw the plugs into the cylinder head finger-tight. Then tighten the spark plugs to 13 ft. lbs. (18 Nm).
  2.  
  3. Install the ignition coil(s), as outlined in this section.

    Click image to see an enlarged view

    Fig. The spark plugs are located under the ignition coils

  4.  

 
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