Pilot 2006-2008

Spark Plugs

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Inspection



Specific to:

Honda Pilot 2006-2008

Check the plugs for deposits and wear. If they are not going to be replaced, clean the plugs thoroughly. Remember that any kind of deposit will decrease the efficiency of the plug. Plugs can be cleaned on a spark plug cleaning machine, which can sometimes be found in service stations, or you can do an acceptable job of cleaning with a stiff brush. If the plugs are cleaned, the electrodes must be filed flat. Use an ignition points file, not an emery board or the like, which will leave deposits. The electrodes must be filed perfectly flat with sharp edges; rounded edges reduce the spark plug voltage by as much as 50 percent.

Check spark plug gap before installation. The ground electrode (the L-shaped one connected to the body of the plug) must be parallel to the center electrode and the specified size wire gauge must pass between the electrodes with a slight drag.

NEVER adjust the gap on a used platinum type spark plug.

Always check the gap on new plugs as they are not always set correctly at the factory. Do not use a flat feeler gauge when measuring the gap on a used plug, because the reading may be inaccurate. A round-wire type gapping tool is the best way to check the gap. The correct gauge should pass through the electrode gap with a slight drag. If you're in doubt, try one size smaller and one larger. The smaller gauge should go through easily, while the larger one shouldn't go through at all. Wire gapping tools usually have a bending tool attached. Use that to adjust the side electrode until the proper distance is obtained. Be careful not to bend the side electrode too far or too often as it may weaken and break off within the engine, requiring removal of the cylinder head to retrieve it.

Removal & Installation



Specific to:

Honda Pilot 2006-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE
    Be sure that you have the anti-theft codes for the audio system and navigation system, if equipped. Record the audio presets.

  2.  
  3. Before servicing the vehicle, refer to the Precautions Section.
  4.  
  5. Turn the ignition switch OFF.
  6.  
  7. Disconnect and isolate the negative battery cable. Wait 3 minutes for the system capacitor to discharge before performing any service.
  8.  
  9. Disconnect the positive battery cable.
  10.  
  11. Remove the engine cover.

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    Fig. Engine cover

  12.  
  13. Disconnect the ignition coil connectors. Remove the front bank of ignition coils.

    Click image to see an enlarged view

    Fig. Ignition coils and related components-front bank



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    Fig. Ignition coils and related components-rear bank

  14.  
  15. Disconnect the ignition coil connectors. Remove the rear bank of ignition coils.
  16.  
  17. Remove the spark plugs.
  18.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Tighten the spark plug to specification. Be careful not to over tighten the plug and break the ceramic tip.
    NOTE
    The power window reset procedure must be performed when disconnecting the battery, removing the No. 1 (20 amp) fuse in the passenger-s under dash fuse/relay box, disconnecting the 18P connector from the power window control unit, removing the window regulator, glass or glass run channel and disconnecting the driver-s door wire harness.

  4.  
  5. Turn the ignition switch OFF.
  6.  
  7. Turn the ignition switch ON (II).
  8.  
  9. Move the driver-s power window all the way down by holding the driver-s power window switch firmly down to the second detent. When the window reaches the bottom, hold the driver-s power window switch in the AUTO DOWN position for two seconds.
  10.  
  11. Move the driver-s power window all the way up without stopping by holding the driver-s power window switch firmly up to the second detent. When the window reaches the top, hold the driver-s power window switch in the AUTO UP position for two seconds.
    NOTE
    If the power window does not work in AUTO, repeat the procedure.

  12.  

 
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