2010 Acura TL BaseFACTORY OEM SERVICE PROCEDURE

Spark Plug Inspection

  1. Remove the ignition coils (see IGNITION COIL REMOVAL/INSTALLATION )
  2. Remove the spark plugs, then inspect the electrodes and the ceramic insulator
    • Burned or worn electrodes may be caused by these conditions
      • Advanced ignition timing
      • Loose spark plug
      • Plug heat range too hot
      • Insufficient cooling
    • Fouled plugs may be caused by these conditions
      • 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
    Fig 1: Identifying Spark Plug
    G05986538Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. If the spark plug electrode is dirty or contaminated, clean the electrode with a plug cleaner
    NOTE:
    • Do not use a win? brush or scrape the indium electrode since this will damage the electrode
    • When using a sand blaster spark plug cleaner, do not clean for more than 20 seconds to avoid damaging the electrode
  4. Replace the plug at the specified interval, or if the center electrode is rounded (A), or if the spark plug gap (B) is out of specification Use only the spark plugs listed
    NOTE: Do not adjust the gap of indium tip plugs

    J35Z6 engine 

    Spark Plug 

    NGK ILZKR7B11 

    Electrode Gap 

    Standard (New) 1./0-1.1 mm (0.039-0.043 in) 

    J37A4 engine 

    Spark Plug 

    DENSO SXU22HCR11S 

    Electrode Gap 

    Standard (New) 1.0-1.1 mm (0.039-0.043 in) 

    Fig 2: Identifying Spark Plug Gap
    G05986539Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Apply a small amount of anti-seize compound to the plug threads, and screw the plugs into the cylinder head, finger-tight Torque them to 22 Nm (2.2 kgf.m, 16 lb.ft)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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