What is the spark plug gap on a 2.4 Honda?
For most 2.4-liter Honda engines, the spark plug gap should be about 0.043–0.046 inches (1.10–1.17 mm). Always verify the exact specification in your owner's manual or on the plug packaging for your specific model, year, and plug type.
The 2.4-liter Honda family, commonly associated with the K24 engine, appears in several models such as the Accord, CR-V, and related vehicles across different generations. Because the gap can vary slightly with plug type (copper-core, platinum, or iridium) and whether OEM or aftermarket plugs are used, it's important to reference the exact spec for your setup.
Understanding the spark plug gap for Honda's 2.4L engines
The spark plug gap is a small but critical specification that affects ignition efficiency, idle smoothness, and fuel economy. In the K24 family, manufacturers generally aim for a narrow, precise gap that matches the ignition system and the chosen plug type. Using a gap outside the recommended range can lead to misfires, reduced performance, or increased fuel consumption. The guidance below reflects common practice, but your exact figure should come from the official manual or plug packaging for your specific vehicle.
Note that different plug types may have slightly different recommended gaps. Always confirm the spec for your particular model, year, and plug type before installation.
Common gap specs by plug type used in Honda 2.4L engines:
- Copper-core plugs: typically gap around 0.040–0.045 inches (1.02–1.14 mm).
- Platinum or iridium plugs (OEM or aftermarket): typically gap around 0.043–0.046 inches (1.10–1.17 mm).
- OEM baseline: many K24 manuals indicate a gap near 0.043 inches (1.10 mm); verify for your exact year/model and plug type.
Concluding paragraph: In practice, for modern K24 engines with platinum or iridium plugs, a gap around 0.043–0.046 inches (1.10–1.17 mm) is widely used. Copper-core plugs may use a similar or slightly wider gap depending on the plug’s design. Always confirm with the exact OEM specification for your vehicle and plug type.
How to check and set the spark plug gap safely
Use this guide to check the gap without damaging the plug or the engine. Note that many modern iridium/platinum plugs are already gapped at the factory and should not be re-gapped. If the gap is out of spec, replace with the same type and specification plug rather than attempting to adjust the gap.
- Assemble the right tools: spark plug socket, a torque wrench, and a feeler gauge or a dedicated gap gauge in the correct unit (inches or millimeters).
- Ensure the engine is cool and disconnect the negative battery terminal if performing other electrical work to avoid accidental shocks.
- Remove the spark plug wires or coil packs to access the spark plugs; inspect the threads for damage.
- If you are installing copper-core plugs or non-platinum/iridium plugs and the gap is out of spec for your plug type, adjust the gap using a proper feeler gauge. For iridium/platinum plugs, do not attempt to gap; replace.
- Check the gap with the gauge. For most 2.4L engines, target 0.043–0.046 inches (1.10–1.17 mm).
- Reinstall the plugs and torque to the manufacturer’s specification. (Always follow the exact torque value for your vehicle and plug type.)
- Reattach ignition components and run the engine to confirm smooth operation; check for misfires if any issue persists.
Note: If you are unsure about the exact gap for your vehicle, consult the owner's manual, service bulletin, or the plug packaging for the specific model/year. When in doubt, replacing with a new plug of the correct type is safer than attempting to re-gap an iridium or platinum plug.
Summary
The spark plug gap for most 2.4-liter Honda engines is typically around 0.043–0.046 inches (1.10–1.17 mm) for platinum or iridium plugs, with copper-core plugs often in the 0.040–0.045 inch range. Always verify the exact specification for your model and plug type, and replace rather than re-gap if using platinum/iridium plugs. Following the correct gap and torque specification helps ensure optimal performance and fuel efficiency.
What should the Gap be on a BPR5ES spark plug?
The NGK BPR5ES spark plug typically requires a gap of 0.044 inches (1.1 mm). Incorrect gaps can lead to poor combustion, misfires, or rough idling. Always check the gap with a feeler gauge before installation. Inspect ignition wires and coils for wear, as these affect spark quality.
Are Honda NGK spark plugs pre-gapped?
Honda recommends replacement every 60k miles or sooner. These plugs are pre-gapped at . 044".
What is the spark plug Gap on a 2004 Honda Accord LX?
Notes: Gap 0.044".
What is the spark plug Gap on a 2002 Honda Accord 2.3 L?
0.044"
