What is the spark plug gap on a Honda?
There is no single spark plug gap for every Honda model. The correct gap depends on the engine and the plug type, but many Honda engines target a gap around 0.043 inches (1.1 mm). Always verify the exact specification for your vehicle in the owner's manual or service data.
Understanding the gap is important because it affects ignition, combustion efficiency, and overall performance. The following guide explains typical ranges and how to check and adjust the gap for Honda engines.
Why the gap matters
The spark plug gap determines how far the electrical arc must jump to ignite the air-fuel mixture. If the gap is too wide, the ignition system may struggle to fire reliably, leading to misfires and reduced power. If the gap is too narrow, the spark energy can be wasted, potentially affecting fuel economy and performance. Correctly gapping plugs helps ensure smooth starting, clean combustion, and optimal engine efficiency across Honda models.
Common ranges for Honda engines
Before you adjust a gap, it’s important to know that ranges vary by engine family, plug type, and model year. The list below provides typical targets and limits to guide you, but always confirm with your specific vehicle data.
- Broad operating range often observed across Honda engines: 0.028–0.060 inches (0.7–1.5 mm)
- Common target for many modern Honda engines: about 0.043 inches (1.1 mm)
- Older or specialized models and certain plug types may use approximately 0.031–0.036 inches (0.8–0.9 mm) or up to 0.047–0.057 inches (1.2–1.5 mm) depending on the plug and application
Because exact requirements vary by model and plug type, verify the specification for your Honda in the owner’s manual or service data, or consult your dealer or a trusted mechanic.
How to check and set the gap
To check and set the gap, use the gap specification from your model’s documentation and a proper feeler gauge. The steps below outline a typical process, but always follow your manufacturer’s instructions for your vehicle.
- Ensure the engine is off and cool, and locate the spark plugs. Have the correct replacement plugs ready if you need to replace any that are worn or damaged.
- Remove the spark plug using the appropriate socket and keep track of which cylinder you are working on.
- Measure the gap with a suitable feeler gauge and compare it to the specified value. If the gap is slightly off, gently adjust by bending the side electrode or replace with a plug that has the correct gap.
- After gap adjustment, reinstall the plug and tighten to the manufacturer’s torque specification. Use anti-seize compound only if recommended by Honda for your plug type.
- Repeat for all plugs, then start the engine to check for smooth operation. If you notice misfires or rough idle, re-check the gaps and plug condition.
Consistent testing after installation helps ensure the ignition system performs as designed and can prevent driveability issues.
Plug types and part numbers
Honda-approved plugs vary by model and engine code. When replacing plugs, use the OEM-recommended part numbers and confirm the gap specification for the chosen plug type. Iridium and platinum plugs are common in many Honda vehicles, and some come pre-gapped; others require manual adjustment to the correct specification.
Summary
In short, there is no universal spark plug gap for all Honda vehicles. The gap depends on your specific engine and plug type, with a typical practical range of 0.028–0.060 inches (0.7–1.5 mm) and a common target around 0.043 inches (1.1 mm). Always check your owner’s manual or service data to obtain the exact specification, and follow proper procedures when inspecting or adjusting gaps to maintain performance and reliability.
What is the spark plug Gap on a 2012 Honda?
0.044" 1.1 mm
Gap 0.044" 1.1 mm. 2 Plugs Per Cylinder Required.
What is the spark plug Gap on a 2010 Honda Accord 3.5 V6?
Notes: Gap 0.044".
What is the spark plug Gap on a Honda 3.5 V6?
0.044"
Are Honda NGK spark plugs pre-gapped?
Honda recommends replacement every 60k miles or sooner. These plugs are pre-gapped at . 044".
