2007 Acura TL BaseFACTORY OEM SERVICE PROCEDURE

Spark Plug Inspection

  1. Remove the spark plugs, and 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: Inspecting Spark Plug
        G05457446Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. If the spark plug electrode is dirty or contaminated, clean the electrode with a plug cleaner.
    NOTE:
    • Do not use a wire brush or scrape the iridium electrode since this will damage the electrode.
    • When using a sandblaster spark plug cleaner, do not clean for more than 20 seconds to avoid damaging the electrode.
  3. Do not adjust the gap (A) of iridium tip plugs, replace the spark plug if the gap is out of specification.

    Electrode Gap 

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

    Fig 2: Identifying Gap Of Iridium Tip Plugs
    G05457447Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Replace the plug at the specified interval or if the center electrode is rounded (A). Use only the spark plugs listed.

    Spark Plugs 

    NGK: IZFR6K11 

    Fig 3: Identifying Center Electrode Of Spark Plug
    G05457448Courtesy 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 18 N.m (1.8 kgf.m, 13 lbf.ft).
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.