The recommended spark plug gap for the 2008 Honda Accord V6 is 0.043 inches (1.1 mm).
This article explains the official spec, why the gap matters, and how to verify or adjust the gap when replacing spark plugs on the 3.5-liter V6 engine.
Official specifications for the 2008 Accord V6
The factory service information for the 3.5L V6 in the 2008 Accord specifies a spark plug gap of 0.043 inches (1.1 mm) for standard replacement plugs. If you use aftermarket plugs, confirm the plug manufacturer’s recommended gap, which typically falls in the range of 0.043–0.047 inches.
Some plugs may arrive pre-gapped; follow the plug maker’s guidance and avoid bending or re-gapping iridium/platinum plugs beyond the manufacturer’s instructions.
With that gap in mind, here are the basics to keep in mind when you replace or inspect plugs on the 2008 Accord V6.
- Gap target: 0.043 inches (1.1 mm) for the 3.5L V6 engine in the 2008 Accord.
- Plug choices: OEM-equivalent or reputable aftermarket plugs should maintain the 0.043 in gap unless the manufacturer specifies otherwise; common options are from NGK or Denso.
- Performance impact: Maintaining the correct gap supports proper ignition, combustion, and smooth engine operation for the V6.
In short, using a plug with the correct gap or verifying the gap to 0.043 inches is essential for optimal performance on the 2008 Accord V6.
How to check and adjust the spark plug gap
When replacing spark plugs, verify the gap with a precise feeler gauge and adjust if necessary. Here is a practical checklist to guide the process.
- Remove the spark plug boot and extract the spark plug from the engine bay.
- Inspect the plug to ensure it’s clean and free of debris; if the plug is fouled, replace it rather than attempting to re-gap a used plug.
- Measure the gap with a feeler gauge set to 0.043 inches (1.1 mm). If the gauge slides in with moderate resistance, the gap is correct; if not, carefully adjust by bending the side electrode or selecting a plug with the correct gap.
- Reinstall the plug with any recommended anti-seize compounds or anti-fouling coatings as specified by the manufacturer, and insert it properly to avoid cross-threading.
- Reconnect the ignition components and start the engine to verify smooth operation and proper combustion.
Always verify the gap after any adjustment and ensure the plug is installed correctly to maintain engine reliability.
Summary
For the 2008 Honda Accord V6, the recommended spark plug gap is 0.043 inches (1.1 mm). When replacing plugs, use the specified gap or the plug maker’s guidance, check the gap with a gauge, and install correctly to preserve performance and reliability of the 3.5L V6 engine.